TY - CONF AU - Ferrario, M. AU - Aßmann, R.W. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - From Dreams to Reality: Prospects for Applying Advanced Accelerator Technology to Next Generation Scientific User Facilities J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Recent years have seen spectacular progress in the development of innovative acceleration methods that are not based on traditional RF accelerating structures. These novel developments are at the interface of laser, plasma and accelerator physics and may potentially lead to much more compact and economical accelerator facilities. While primarily focusing on the ability to accelerate charged particles with much larger gradients than traditional RF, these new techniques have yet to demonstrate comparable performances to RF in terms of both beam parameters or reproducibility. To guide the developments beyond the necessary basic R&D and concept validations, a common understanding and definition of required performance and beam parameters for an operational user facility is now needed. These innovative user facilities can include "table-top" light sources, medical accelerators, industrial accelerators or even high-energy colliders. The talk will review the most promising developments in new acceleration methods, it will present the status of ongoing projects including the EU project EuPRAXIA and will identify the set of required specifications for the application under consideration. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1 EP - 5 KW - plasma KW - electron KW - laser KW - acceleration KW - wakefield DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOXPLM2 UR - http://jacow.org/ipac2019/papers/moxplm2.pdf ER - TY - CONF AU - Kostin, D. AU - Ayvazyan, V. AU - Branlard, J. AU - Decking, W. AU - Lilje, L. AU - Omet, M. AU - Schnautz, T. AU - Vogel, E. AU - Walker, N. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - SRF Operation at XFEL: Lessons Learned After More Than One Year J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The European XFEL is the largest high-field SRF installation in the world and has now been in operation more than a year. It serves as a "prototype" for other facilities being constructed or in the planning stages. Performance of the operation of the SRF system over this period of time and the lessons learned will be discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 12 EP - 16 KW - FEL KW - cavity KW - operation KW - linac KW - SRF DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOYPLM2 UR - http://jacow.org/ipac2019/papers/moyplm2.pdf ER - TY - CONF AU - Balandin, V. AU - Golubeva, N. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Notes on Linear Theory of Coupled Particle Beams with Equal Eigenemittances J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - We consider some aspects of the linear theory of coupled particle beams with equal eigenemittances and compare them with the one dimensional Courant-Snyder theory. PB - JACoW Publishing CP - Geneva, Switzerland SP - 98 EP - 100 KW - emittance KW - betatron KW - linear-dynamics KW - synchrotron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPGW015 UR - http://jacow.org/ipac2019/papers/mopgw015.pdf ER - TY - CONF AU - Balandin, V. AU - Decking, W. AU - Golubeva, N. AU - Scholz, M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Straightness Correction of Ballistic Trajectories J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - We describe procedure for straightness correction of ballistic trajectories in the presence of BPM noise and unknown BPM offsets. We also discuss applicability of this method to the beam based alignment of the European XFEL undulators. PB - JACoW Publishing CP - Geneva, Switzerland SP - 101 EP - 103 KW - FEL KW - alignment KW - undulator KW - quadrupole KW - focusing DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPGW016 UR - http://jacow.org/ipac2019/papers/mopgw016.pdf ER - TY - CONF AU - Yamin, S. AU - Aßmann, R.W. AU - Dorda, U. AU - Lemery, F. AU - Marchetti, B. AU - Panofski, E. AU - Walker, P.A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Design Considerations for Permenant Magnetic Quadrupole Triplet for Matching Into Laser Driven Wake Field Acceleration Experiment at SINBAD J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - SINBAD (Short and INnovative Bunches and Accelerators at DESY) facility aims to produce ultrashort bunches (sub-fs) at ~100 MeV, suitable for injection into novel accelerators e.g. dielectric Laser acceleration (DLA) and Laser Driven Wakefield acceleration (LWFA). The LWFA experiment demands β functions to be of the order of 1 mm to reduce energy spreads and emittance growth from nonlinearities. Matching such a space charge dominated beam to such constraints with conventional electromagnets is challenging. A Permanent Magnetic Quadrupole (PMQ) triplet is one promising focusing strategy. In this paper, we investigate the performance of a PMQ triplet to fit the requirements of the electron beam properties in a plasma cell and discuss the realizable phase spaces for the LWFA experiment planned at SINBAD. PB - JACoW Publishing CP - Geneva, Switzerland SP - 143 EP - 146 KW - laser KW - plasma KW - electron KW - experiment KW - acceleration DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPGW027 UR - http://jacow.org/ipac2019/papers/mopgw027.pdf ER - TY - CONF AU - Yamin, S. AU - Aßmann, R.W. AU - Marchetti, B. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Study for the Alignment of Focusing Solenoid of ARES RF Gun and Effect of Misalignment of Solenoid on Emittance of Space Charge Dominated Electron Beam J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - SINBAD (Short and INnovative Bunches and Accelerators at DESY) facility will host multiple experiments relating to ultra-short high brightness beams and novel experiments with ultra-high gradient. ARES (Accelerator Research Experiment at SINBAD) Linac is an S-band photo injector to produce such electron bunches at around 100 MeV. The Linac will be commissioned in stages with the first stage corresponding to gun commissioning. In this paper, we present studies about the scheme adopted for the alignment of focusing solenoid for the ARES gun. The method is bench marked using ASTRA simulations. Moreover the effect of misalignment of the solenoid on the emittance of space charge dominated scheme and its compensation is also discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 147 EP - 150 KW - solenoid KW - alignment KW - emittance KW - electron KW - gun DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPGW028 UR - http://jacow.org/ipac2019/papers/mopgw028.pdf ER - TY - CONF AU - Chao, H.C. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Design Status of DESY IV – Booster Upgrade for PETRA IV J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - In PETRA IV project the on-axis injection scheme is preferred since there is no sufficient dynamic aperture for off-axis injection in ultra low emittance storage rings. The challenge is to prepare the injected bunches with the smaller emittance and larger intensity. The current injector complex including the accumulator and booster does not fulfill the requirements and thus will need refurbishments. The injector upgrade option chosen will be composed of an upgraded electron gun, a higher energy LINAC, and the new booster synchrotron DESY IV which has smaller emittance. DESY IV will be located in the existing tunnel of the current booster DESY II. The design of the lattice and some simulation results are addressed in this article. PB - JACoW Publishing CP - Geneva, Switzerland SP - 331 EP - 334 KW - booster KW - injection KW - emittance KW - insertion KW - linac DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPGW092 UR - http://jacow.org/ipac2019/papers/mopgw092.pdf ER - TY - CONF AU - Zimmermann, F. AU - Abelleira, J.L. AU - Abramov, A. AU - Amorim, D. AU - Antipov, S.A. AU - Apyan, A. AU - Arsenyev, S. AU - Barranco García, J. AU - Benedikt, M. AU - Bruce, R. AU - Burkart, F. AU - Cai, Y. AU - Crouch, M.P. AU - Cruz Alaniz, E. AU - Fartoukh, S.D. AU - Giovannozzi, M. AU - Goddard, B. AU - Guillermo Cantón, G. AU - Hofer, M. AU - Keintzel, J. AU - Kersevan, R. AU - Mertens, V. AU - Mether, L. AU - Molson, J. AU - Muttoni, Y. AU - Nosochkov, Y.M. AU - Ohmi, K. AU - Oide, K. AU - Osborne, J.A. AU - Parma, V. AU - Pieloni, T. AU - Pikhartova, H. AU - Raginel, V. AU - Redaelli, S. AU - Risselada, T. AU - Rivkin, L. AU - Ruehl, I. AU - Salvant, B. AU - Schoerling, D. AU - Seryi, A. AU - Shaposhnikova, E.N. AU - Tambasco, C. AU - Tavian, L.J. AU - Todesco, E. AU - Tommasini, D. AU - Tomás, R. AU - Valchkova-Georgieva, F. AU - Venturi, V. AU - Wollmann, D. AU - Zhou, D. AU - van Riesen-Haupt, L. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Updated High-Energy LHC Design J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - We present updated design parameters for a future High-Energy LHC. A more realistic turnaround time has led to a revision of the target peak luminosity, as well as a choice of a larger IP beta function, and longer physics fills. Pushed parameters of the Nb₃Sn superconducting cable together with a modified layout of the 16 T dipole magnets resulted in revised field errors, updated dynamic-aperture simulations, and an associated re-evaluation of injector options. Collimators in the dispersion suppressors help achieve satisfactory cleaning performance. Longitudinal beam parameters ensure beam stability throughout the cycle. Intrabeam scattering rates and Touschek lifetime appear benign. PB - JACoW Publishing CP - Geneva, Switzerland SP - 524 EP - 527 KW - injection KW - emittance KW - proton KW - impedance KW - damping DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPMP037 UR - http://jacow.org/ipac2019/papers/mopmp037.pdf ER - TY - CONF AU - Burkart, F. AU - Aßmann, R.W. AU - Dorda, U. AU - Hauser, J. AU - Lederer, S. AU - Lemery, F. AU - Marchetti, B. AU - Mayet, F. AU - Panofski, E. AU - Trunk, M. AU - Wiesener, P. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - The Experimental Area at the ARES LINAC J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The ARES (Accelerator Research Experiment at SINBAD) linac at the accelerator R&D facility SINBAD (Short innovative bunches and accelerators at DESY) will drive multiple independent experiments including the acceleration of ultrashort electron bunches. In addition the linac will host an experimental area, open for transnational access, to study advanced high gradient, laser driven, acceleration concepts, like the ones studied within the ACHIP (accelerator on a chip) project. The area will be operational mid-2019. This paper will report on the current status of the experimental area, including hardware parameters, beam optics, achievable beam parameters, design of the experimental chamber and commissioning plans. The modification plans for a micro-bunching experiment in the frame of the ACHIP experiment and future upgrade plans will be shown and discussed in detail. PB - JACoW Publishing CP - Geneva, Switzerland SP - 867 EP - 870 KW - experiment KW - laser KW - electron KW - linac KW - acceleration DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS014 UR - http://jacow.org/ipac2019/papers/mopts014.pdf ER - TY - CONF AU - Lemery, F. AU - Aßmann, R.W. AU - Dorda, U. AU - Flöttmann, K. AU - Hauser, J. AU - Hüning, M. AU - Kube, G. AU - Lantschner, M. AU - Lederer, S. AU - Marchetti, B. AU - Mildner, N. AU - Pelzer, M. AU - Rosan, M. AU - Tiessen, J. AU - Wittenburg, K. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Overview of the ARES Bunch Compressor at SINBAD J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Bunch compressors are essential for the generation of short bunches with applications in e.g. colliders, free electron lasers, and advanced accelerator concepts. The up-and-coming ARES accelerator located at SINBAD, DESY will support the formation of ~100~MeV, pC, sub-fs electron bunches for LWFA research and development. We give an overview on the ARES bunch compressor, providing start-to-end simulations of the machine and an update on its technical design. PB - JACoW Publishing CP - Geneva, Switzerland SP - 902 EP - 905 KW - electron KW - laser KW - plasma KW - linac KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS025 UR - http://jacow.org/ipac2019/papers/mopts025.pdf ER - TY - CONF AU - Panofski, E. AU - Aßmann, R.W. AU - Burkart, F. AU - Dorda, U. AU - Flöttmann, K. AU - Hüning, M. AU - Marchetti, B. AU - Marx, D. AU - Mayet, F. AU - Walker, P.A. AU - Yamin, S. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status Report of the SINBAD-ARES RF Photoinjector and LINAC Commissioning J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The accelerator R&D facility SINBAD (Short innovative bunches and accelerators at DESY) will drive multiple independent experiments including the acceleration of ultrashort electron bunches and the test of advanced high gradient acceleration concepts. The SINBAD-ARES (Accelerator Research Experiment at SINBAD) setup hosts a normal conducting RF photoinjector generating a low charge electron beam that is afterwards accelerated to 100 MeV by an S-band linac section. The linac as well as a magnetic chicane allow the production of ultrashort pulses with an excellent arrival-time stability. The high brightness beam has then the potential to serve as a test beam for next generation compact acceleration schemes. The setup of the SINBAD-ARES facility will proceed in stages. We report on the current status of the ARES RF gun and linac commissioning. PB - JACoW Publishing CP - Geneva, Switzerland SP - 906 EP - 909 KW - gun KW - linac KW - electron KW - laser KW - experiment DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS026 UR - http://jacow.org/ipac2019/papers/mopts026.pdf ER - TY - CONF AU - Tomin, S. AU - Fröhlich, L. AU - Scholz, M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status of Automated Optimization Procedures at the European XFEL Accelerator J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The European XFEL is in the operational stage since fall 2017. Since then, tuning of the FEL performance (e.g. of the photon pulse energy) has become increasingly important. Due to a large number of parameters to which FEL facilities are highly sensitive and their complex correlations, controlling and optimizing them in a speedy manner is becoming a very important and challenging task. Several automated optimization procedures were developed to optimize the FEL beam quality. In this work, we present the status and the results of these activities, as well as the optimization statistics. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1212 EP - 1215 KW - FEL KW - feedback KW - electron KW - undulator KW - status DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUZZPLM2 UR - http://jacow.org/ipac2019/papers/tuzzplm2.pdf ER - TY - CONF AU - Agapov, I.V. AU - Bacher, R. AU - Bieler, M. AU - Bospflug, R. AU - Brinkmann, R. AU - Chae, Y.-C. AU - Chao, H.C. AU - Duhme, H.T. AU - Ebert, M. AU - Eckoldt, H.-J. AU - Ehrlichmann, H. AU - Gavaldà, X.N. AU - Hurdelbrink, U. AU - Hüning, M. AU - Keil, J. AU - Klute, J. AU - Krause, B. AU - Kube, G. AU - Körfer, M. AU - Leemans, W. AU - Lilje, L. AU - Obier, F. AU - Petrov, A. AU - Plambeck, N. AU - Prenting, J. AU - Sahoo, G.K. AU - Schlarb, H. AU - Schlösser, M. AU - Schmidt-Föhre, F. AU - Schmitz, M. AU - Schroer, C.G. AU - Tempel, T. AU - Thede, M. AU - Tischer, M. AU - Wanzenberg, R. AU - Weckert, E.F. AU - Wilksen, T. AU - Wittenburg, K. AU - Zhang, J.X. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status of the PETRA IV project J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Since 2016 DESY has been pursuing R&D towards upgrading its PETRA synchrotron light source to a fourth-generation machine, PETRA IV, which is expected to start operation in 2027. The conceptual design of a 6 GeV seven-bend-achromat-based lattice with an approx. 10pm emittance along with critically important technical systems has been completed. We will present the status of the project, the expected parameter space of the facility, and lattice design and beam dynamics issues for the main ring. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1404 EP - 1407 KW - emittance KW - lattice KW - brightness KW - timing KW - synchrotron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPGW011 UR - http://jacow.org/ipac2019/papers/tupgw011.pdf ER - TY - CONF AU - Agapov, I.V. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Sensitivity Studies of the PETRA IV Lattice J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - As the machine with the smallest emittance among the planned fourth-generation hard x-ray synchrotron light sources, PETRA IV will have very demanding requirements on magnet alignment and stability. Several developments to address mechanical and beam-based stabilization have been started in connection to that. Here we summarize the alignment and field error tollerances resulting from startup and commissioning simulations of the main ring. Novel high level control tools will be required to assure smooth operation of the machine; progress in their development and beam test results at PETRA III will be reported. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1408 EP - 1410 KW - alignment KW - emittance KW - simulation KW - site KW - resonance DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPGW012 UR - http://jacow.org/ipac2019/papers/tupgw012.pdf ER - TY - CONF AU - Bieler, M. AU - Agapov, I.V. AU - Chae, Y.-C. AU - Keil, J. AU - Sahoo, G.K. AU - Wanzenberg, R. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Petra III Operation and Studies 2018 J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - At DESY the Synchrotron Light Source PETRA III offers scientists outstanding opportunities for experiments with hard X-rays of exceptionally high brilliance since 2009. This paper describes the operational schedule, the operational statistics and the most important beam studies done at PETRA III in 2018. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1419 EP - 1421 KW - operation KW - vacuum KW - impedance KW - undulator KW - radiation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPGW015 UR - http://jacow.org/ipac2019/papers/tupgw015.pdf ER - TY - CONF AU - Chao, H.C. AU - Brinkmann, R. AU - Gavaldà, X.N. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - PETRA IV Study with Non-Interleaved Sextupole Scheme J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - This study is an attempt to design PETRA IV storage ring, which is an upgrade from PETRA III toward diffraction-limit synchrotron light source, based on the non-interleaved sextupole scheme. The lattice is constructed by mixing different types of cells. There are two basic building blocks. The double minus identity (DMI) cell dedicated for the chromaticity correction with non-interleaved sextupoles is tightly built up, while the combined function FODO cell with dispersion suppressors provides straights with small beta functions ideally for undulators. In addition, the hybrid section including a 10-m long super insertion device (ID) is custom-made to adapt to DESY’s current site plan. The beam dynamic behaviors are simulated and discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1430 EP - 1433 KW - sextupole KW - lattice KW - emittance KW - storage-ring KW - optics DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPGW018 UR - http://jacow.org/ipac2019/papers/tupgw018.pdf ER - TY - CONF AU - Zhang, J.X. AU - Agapov, I.V. AU - Ehrlichmann, H. AU - Gavaldà, X.N. AU - Hüning, M. AU - Keil, J. AU - Obier, F. AU - Schmitz, M. AU - Wanzenberg, R. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - The Injection System and the Injector Complex for PETRA IV J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - PETRA IV project is to upgrade PETRA III to a synchrotron radiation source with an ultra-low emittance. Due to the small dynamic aperture of the PETRA IV storage ring, a horizontal on-axis injection is prepared. In this paper, the preliminary study of the injection scheme is described. To meet the requirements of the on-axis injection, a plan of a new injector complex, including the Gun, the LINAC and the accumulator is shown in this paper. Several options are discussed in this paper, too. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1465 EP - 1467 KW - injection KW - emittance KW - kicker KW - gun KW - booster DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPGW029 UR - http://jacow.org/ipac2019/papers/tupgw029.pdf ER - TY - CONF AU - Chae, Y.-C. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Working Impedance Model and Its Effect on the Intensity Limitation of Petra-IV Storage Ring J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - We made sufficient progress in modeling the imped-ance of the PETRA-IV storage ring. The result was ap-plied to estimate the impedance-based single and multi-bunch intensity limit. Due to the extremely small emit-tance of the beam the intrabeam scattering (IBS) effects will be significant unless they are reduced by bunch lengthening. The 3rd harmonic cavity was proposed to dilute the bunch density which resulted in the small syn-chrotron frequency with a large spread. Because of the complexity introduced by impedance and harmonic cavity we used broadband impedance up to 200 GHz to compute the parameters such as bunch length and energy spread at different currents. We found that the microwave instability started very early in current less than 0.5 mA. Even if it is small, the prediction by tracking simulation was consistent with another diffraction-limited storage ring (DLSR) when the Keil-Schnell criterion was used to predict one from the other. Then, we present the single-bunch current limit which had included the effect of geometric and resistive wall impedances of the NEG-coated chamber. Finally, we present the emittance and lifetime which can be realistically achieved in the ring with the above collective effects included. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1623 EP - 1626 KW - impedance KW - cavity KW - feedback KW - emittance KW - storage-ring DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPGW092 UR - http://jacow.org/ipac2019/papers/tupgw092.pdf ER - TY - CONF AU - Burkart, F. AU - Aßmann, R.W. AU - Brinkmann, R. AU - Decking, W. AU - Golubeva, N. AU - Heinemann, B. AU - Hüning, M. AU - List, J. AU - Wing, M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - LUXE - a QED Experiment at the European XFEL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The proposed experiment aims to measure QED in the presence of strong fields and above the Schwinger critical field. An experiment is being considered at the European XFEL, which should be able to measure non-perturbative QED and its transition from the perturbative regime. This paper presents the current status of the LUXE (Laser und XFEL Experiment) design study. First layout considerations; accelerator beam line design, electron and laser beam parameters, radioprotection issues and first results of the start to end simulations will be presented and discussed in detail. An outlook concerning the implementation into the XFEL schedule and timeline of this experiment will be given. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1694 EP - 1697 KW - experiment KW - FEL KW - electron KW - laser KW - photon DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB008 UR - http://jacow.org/ipac2019/papers/tuprb008.pdf ER - TY - CONF AU - Grattoni, V. AU - Ackermann, S. AU - Aßmann, R.W. AU - Faatz, B. AU - Hillert, W. AU - Lang, T. AU - Lechner, C. AU - Mohammad Kazemi, M.M. AU - Paraskaki, G. AU - Reiche, S. AU - Zemella, J. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Simulation Studies for a EEHG seeded FEL in the XUV J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Echo-enabled harmonic generation (EEHG) is a promising technique for seeded free electron lasers (FELs) not only to go down to wavelengths of 4 nm, but also to simplify the schemes that are currently used to achieve a similar wavelength range (double cascade HGHG). Thus a study optimizing the EEHG performance in the wavelength range from 60 to §I{4}{nm} has been performed. The more critical working point, at 4 nm, is here analyzed in terms of seed laser energy stability for two different seed laser frequencies: visible and UV. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1705 EP - 1708 KW - laser KW - bunching KW - electron KW - FEL KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB013 UR - http://jacow.org/ipac2019/papers/tuprb013.pdf ER - TY - CONF AU - Liu, S. AU - Brinker, F. AU - Decking, W. AU - Fröhlich, L. AU - Golubeva, N. AU - Wamsat, T. AU - Wilgen, J. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Collimator Performance Study at the European XFEL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Beam halo collimation is of great importance for the high repetition rate operation at the European XFEL and for the future CW machines. At the European XFEL several different types of collimators are installed at different locations of the beam line, which include the gun collimators, the bunch compressor collimators, and the main and supplementary collimators in the collimation section. Beam halo measurements have been performed using the wire scanners downstream of the main linac, which show that large part of beam halo is collimated by the gun collimator. Remaining losses in the collimation section are mainly due to misalignment. Alignment using orbit bumps in the collimation section is performed and presented in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1717 EP - 1720 KW - FEL KW - alignment KW - gun KW - collimation KW - operation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB019 UR - http://jacow.org/ipac2019/papers/tuprb019.pdf ER - TY - CONF AU - Decking, W. AU - Brinker, F. AU - Fröhlich, L. AU - Kammering, R. AU - Limberg, T. AU - Liu, S. AU - Nölle, D. AU - Omet, M. AU - Scholz, M. AU - Wamsat, T. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status of the European XFEL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The European XFEL is a Hard X-ray Free Electron Laser based on superconducting accelerator technology. In operation since 2017, it now serves 3 FEL beamlines simultaneously for user experiments. We will report on the present operation of the linear accelerator, the beam distribution to the various beamlines and the performance of the FEL radiators. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1721 EP - 1723 KW - FEL KW - operation KW - electron KW - photon KW - MMI DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB020 UR - http://jacow.org/ipac2019/papers/tuprb020.pdf ER - TY - CONF AU - Liu, S. AU - Li, Y. AU - Wolff-Fabris, F. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Undulator Radiation Dose Caused by Synchrotron Radiation at the European XFEL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Radiation damage of the undulators is a big concern for the light sources. At the European XFEL (EuXFEL), dosimeters based on on-line Radfets are used for the un-dulator radiation dose measurements. However, since the Radfets are not only sensitive to the electrons and neu-trons but also to the photons, it can capture the synchro-tron radiation (SR) generated in the undulators, which is not considered to be the main source for undulator radia-tion damage. Therefore, it is important to estimate the contribution of synchrotron radiation to the radiation doses measured by the Radfets. For this purpose, we have first calculated the synchrotron radiation profile using SPECTRA, and then put the profile into the tracking code BDSIM to track it through the whole undulator beam line. The radiation doses from SR have been simulated and compared with the measured values. The differences in the radiation doses measured by the Radfets before and after Pb shielding will also be presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1724 EP - 1727 KW - undulator KW - radiation KW - FEL KW - simulation KW - vacuum DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB021 UR - http://jacow.org/ipac2019/papers/tuprb021.pdf ER - TY - CONF AU - Schneidmiller, E. AU - Balandin, V. AU - Decking, W. AU - Dohlus, M. AU - Geloni, G. AU - Golubeva, N. AU - Li, Y. AU - Molodtsov, S. AU - Nölle, D. AU - Pflüger, J. AU - Serkez, S. AU - Sinn, H. AU - Tanikawa, T. AU - Tomin, S. AU - Yurkov, M.V. AU - Zagorodnov, I. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Considerations for the Ultrahard X-ray Undulator Line of the European XFEL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The European XFEL is a multi-user X-ray FEL facility based on superconducting linear accelerator. Presently, three undulators (SASE1, SASE2, SASE3) routinely deliver high-brightness soft- and hard- X-ray beams for users. There are two empty undulator tunnels that were originally designed to operate with spontaneous radiators in the range 20-90 keV. We consider, instead a possible installation of two FEL undulators. One of them (SASE4) is proposed for operation in a standard (7-25 keV) range as well as in ultrahard (25-100 keV) regime. We discuss a possible location and length of SASE4, modifications of electron beam transport, beam dynamics, choice of undulator technology, different operation modes (SASE and advanced lasing concepts) etc. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1732 EP - 1735 KW - undulator KW - FEL KW - photon KW - electron KW - operation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB023 UR - http://jacow.org/ipac2019/papers/tuprb023.pdf ER - TY - CONF AU - Schneidmiller, E. AU - Faatz, B. AU - Hartl, I. AU - Schreiber, S. AU - Tischer, M. AU - Vogt, M. AU - Wurth, W. AU - Yurkov, M.V. AU - Zemella, J. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - A Concept for Upgrade of FLASH2 Undulator Line J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - FLASH is the first soft X-ray FEL user facility, routinely providing brilliant photon beams for users since 2005. There are plans to upgrade both existing undulator lines of this facility, FLASH1 and FLASH2. FLASH1 will mainly operate in XUV range in seeding and SASE modes, while FLASH2 will use the standard SASE regime as well as new lasing concepts aiming at production of brilliant photon beams on the fundamental and harmonics down to 1nm. In this paper we present a concept for FLASH2 upgrade, and discuss different advanced options. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1736 EP - 1739 KW - undulator KW - FEL KW - polarization KW - electron KW - operation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB024 UR - http://jacow.org/ipac2019/papers/tuprb024.pdf ER - TY - CONF AU - Schneidmiller, E. AU - Brinker, F. AU - Decking, W. AU - Gerasimova, N. AU - Grünert, J. AU - Kujala, N.G. AU - Laksman, J. AU - Li, Y. AU - Liu, J. AU - Maltezopoulos, Th. AU - Nölle, D. AU - Petrov, I. AU - Samoylova, L. AU - Serkez, S. AU - Sinn, H. AU - Wolff-Fabris, F. AU - Yurkov, M.V. AU - Zagorodnov, I. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Harmonic Lasing of the European XFEL in the Angstrom Regime J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Harmonic lasing in XFELs is an opportunity to extend the photon energy range of existing and planned X-ray FEL user facilities. Contrary to nonlinear harmonic generation, harmonic lasing can provide much more intense, stable, and narrow-band FEL beam. Another interesting application is Harmonic Lasing Self-Seeding (HLSS) that allows to improve longitudinal coherence and spectral power of a Self-Amplified Spontaneous Emission (SASE) FEL. This concept was successfully tested at FLASH2 in the range of 4.5 - 15 nm and at PAL XFEL at 1 nm. In this contribution we present recent results from the European XFEL where we successfully demonstrated operation of HLSS FEL at 5.9 A, thus pushing harmonic lasing for the first time into the Angstrom regime. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1740 EP - 1743 KW - FEL KW - undulator KW - photon KW - experiment KW - operation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB025 UR - http://jacow.org/ipac2019/papers/tuprb025.pdf ER - TY - CONF AU - Zemella, J. AU - Vogt, M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Optics & Compression Schemes for a Possible FLASH Upgrade J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The proposed FLASH upgrade will rely on high quality electron beams provided to all undulator beamlines. Here we describe possible modifications to the FLASH lattice and the compression scheme that aim at improving the beam quality and the ability to control critical beam properties along the machine - simultaneously and independently for all beamlines. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1744 EP - 1747 KW - FEL KW - emittance KW - electron KW - laser KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB026 UR - http://jacow.org/ipac2019/papers/tuprb026.pdf ER - TY - CONF AU - Vogt, M. AU - Honkavaara, K. AU - Rönsch-Schulenburg, J. AU - Schreiber, S. AU - Zemella, J. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Upgrade Plans for FLASH for the Years After 2020 J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - FLASH is a unique superconducting soft X-ray FEL capable of producing up to 8000 photon pulses per second. A substantial upgrade is planned to keep FLASH attractive and competitive. Several upgrade scenarios are discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1748 EP - 1751 KW - laser KW - electron KW - FEL KW - undulator KW - operation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB027 UR - http://jacow.org/ipac2019/papers/tuprb027.pdf ER - TY - CONF AU - Shi, L. AU - Baboi, N. AU - Jones, R.M. AU - Joshi, N.Y. AU - Pierini, P. AU - Reiche, S. AU - Sulimov, A. AU - Vogel, E. AU - Wamsat, T. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Higher Order Mode Spectra Study of 3.9 GHz Superconducting Radio Frequency Cavities for the European XFEL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - It is important to verify both by simulation and experiments the wakefields in superconducting radio frequency (SRF) cavities, which can degrade the electron beam quality considerably or impose excessive heat load if left undamped. In this paper, we investigate the Higher Order Mode (HOM) spectra of the 3.9 GHz SRF cavities, which are assembled in a cryogenic module and are used to linearize the longitudinal phase space of the electron beam in the injector of the European XFEL. The HOM spectra are significantly different from the ones from a single cavity due to the coupling of the modes amongst cavities. The measurements not only provide direct input for the beam dynamics studies but also for the beam instrumentation utilizing these modes. The mode spectra are also investigated with a number of numerical simulations and the comparison with measurements shows favorable agreement. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1840 EP - 1843 KW - cavity KW - HOM KW - simulation KW - electron KW - FEL DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB075 UR - http://jacow.org/ipac2019/papers/tuprb075.pdf ER - TY - CONF AU - Rönsch-Schulenburg, J. AU - Honkavaara, K. AU - Kuhlmann, M. AU - Schreiber, S. AU - Treusch, R. AU - Vogt, M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status of the Superconducting Soft X-Ray Free-Electron Laser User Facility Flash at DESY J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - FLASH, the free electron laser user facility at DESY (Hamburg, Germany), delivers high brilliance XUV and soft x-ray FEL radiation to photon experiments with different parameters at two undulator beamlines simultaneously. FLASH’s superconducting linac can produce bunch trains of up to 800 bunches within a 0.8 ms RF flat top at a repetition rate of 10 Hz. In standard operation during 2018, FLASH supplied up to 500 bunches in two bunch trains with independent fill patterns and compression schemes to each of the two beamlines. In 2018 first successful plasma accelerating experiments could be reported by the FLASHForward plasma wakefield acceleration experiment situated in a third beamline. We report on the highlights of FLASH operation in 2018/2019. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1909 EP - 1911 KW - experiment KW - laser KW - electron KW - operation KW - undulator DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB106 UR - http://jacow.org/ipac2019/papers/tuprb106.pdf ER - TY - CONF AU - Henkel, C. AU - Flöttmann, K. AU - Hillert, W. AU - Miltchev, V. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Characterization of an Electron Gun Test Setup Based on Multipacting J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - A multipacting electron gun (MEG) is a micro-pulse electron source, based on secondary electron emission in a resonant microwave cavity structure, for the generation of low emittance electron bunches in continuous wave operation. Based on numerical simulations, an experimental test setup for low-energy electron beams at 3 GHz has been established. In this contribution we show a detailed description and characterization of the RF test stand, supported by first results on charge collection measurements of the output current with respect to important operational parameters like power transmission and modifiable mechanical dimensions in the assembly of the experiment. This is a milestone in the development of a MEG setup for higher energetic electron beams and subsequent investigation of essential beam characteristics like emittance and energy distribution for the optimization with regard to best possible beam quality and future fields of application. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1961 EP - 1963 KW - cavity KW - electron KW - cathode KW - multipactoring KW - gun DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS013 UR - http://jacow.org/ipac2019/papers/tupts013.pdf ER - TY - CONF AU - Allaria, E. AU - Badano, L. AU - De Ninno, G. AU - Di Mitri, S. AU - Diviacco, B. AU - Fawley, W.M. AU - Ferrari, E. AU - Garzella, D. AU - Grattoni, V. AU - Hemsing, E. AU - Mirian, N.S. AU - Penco, G. AU - Pop, M.A. AU - Prat, E. AU - Rebernik Ribič, P. AU - Roussel, E. AU - Spampinati, S. AU - Spezzani, C. AU - Trovò, M. AU - Xiang, D. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Amplified Emission of a Soft-X Ray Free-Electron Laser Based on Echo-Enabled Harmonic Generation J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - We report the first evidence of substantial gain in a soft-X ray Free Electron Laser (FEL) based on Echo-Enabled Harmonic Generation (EEHG). The experiment was focused on harmonics 36 (~7.3nm) and 45 (5.8 nm) and clearly demonstrated the expected EEHG capability of generating powerful and coherent FEL pulses, with strongly reduced sensitivity to electron-beam fluctuations. The experiment was carried out at FERMI, the seeded FEL user facility at Elettra-Sincrotrone Trieste. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2230 EP - 2232 KW - FEL KW - laser KW - electron KW - experiment KW - free-electron-laser DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEXXPLM1 UR - http://jacow.org/ipac2019/papers/wexxplm1.pdf ER - TY - CONF AU - Nghiem, P.A.P. AU - Alesini, D. AU - Aschikhin, A. AU - Audet, T. AU - Aßmann, R.W. AU - Beck, A. AU - Chancé, A. AU - Chen, M. AU - Chiadroni, E. AU - Cianchi, A. AU - Clarke, J.A. AU - Couprie, M.-E. AU - Croia, M. AU - Cros, B. AU - Dattoli, G. AU - Del Dotto, A. AU - Delerue, N. AU - Dorda, U. AU - Ferran Pousa, A. AU - Ferrario, M. AU - Fonseca, R.A. AU - Ghaith, A. AU - Giribono, A. AU - Gizzi, L.A. AU - Helm, A. AU - Hidding, B. AU - Hooker, S.M. AU - Ibison, M.G. AU - Jaroszynski, D.A. AU - Kruchinin, K.O. AU - Labate, L. AU - Lee, P. AU - Li, F.Y. AU - Li, X. AU - Libov, V. AU - Marchetti, B. AU - Martinez de la Ossa, A. AU - Marx, D. AU - Massimo, F. AU - Mathieu, F. AU - Maynard, G. AU - Mazzotta, Z. AU - Mehrling, T.J. AU - Molodozhentsev, A.Y. AU - Mosnier, A. AU - Mostacci, A. AU - Najmudin, Z. AU - Nguyen, F. AU - Niknejadi, P. AU - Oumbarek Espinos, D. AU - Pattathil, R. AU - Pompili, R. AU - Romeo, S. AU - Rossi, A.R. AU - Schaper, L. AU - Sheng, Z.M. AU - Shpakov, V. AU - Silva, L.O. AU - Silva, T. AU - Simon, C. AU - Specka, A. AU - Stella, A. AU - Streeter, M.J.V. AU - Svystun, E.N. AU - Symes, D. AU - Terzani, D. AU - Toci, G. AU - Tomassini, P. AU - Vaccarezza, C. AU - Vieira, J.M. AU - Vujanovic, M. AU - Walczak, R. AU - Walker, P.A. AU - Weikum, M.K. AU - Welsch, C.P. AU - Weng, S.M. AU - Wiggins, S.M. AU - Wolfenden, J. AU - Yoffe, S. AU - Zhu, J. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - EuPRAXIA, a Step Toward a Plasma-Wakefield Based Accelerator With High Beam Quality J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The EuPRAXIA project aims at designing the world’s first accelerator based on plasma-wakefield advanced technique, which can deliver a 5 GeV electron beam with simultaneously high charge, low emittance and low energy spread to user’s communities. Such challenging objectives can only have a chance to be achieved when particular efforts are dedicated to identify the subsequent issues and to find the way to solve them. Many injection/acceleration schemes and techniques have been explored by means of thorough simulations in more than ten European institutes to sort out the most appropriate ones. The specific issues of high charge, high beam quality and beam extraction then transfer to the user’s applications, have been tackled with many innovative approaches*. This article highlights the different advanced methods that have been employed by the EuPRAXIA collaboration and the preliminary results obtained. The needs in terms of laser and plasma parameters for such an accelerator are also summarized. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2291 EP - 2295 KW - plasma KW - laser KW - injection KW - acceleration KW - emittance DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEZZPLS2 UR - http://jacow.org/ipac2019/papers/wezzpls2.pdf ER - TY - CONF AU - Jaster-Merz, S. AU - Aßmann, R.W. AU - Burkart, F. AU - Dorda, U. AU - Kraemer, U. AU - Panofski, E. AU - Stanitzki, M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Development of a Silicon Strip Detector for Novel Accelerators at Sinbad J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - At the SINBAD facility (DESY Hamburg), novel particle acceleration techniques like dielectric laser acceleration (DLA) structures will be tested using the ARES linac. Due to the small size of these structures, the accelerated electron beams only have a very low (sub-pC) charge. To determine the energy distribution of these beams, a silicon strip detector for the ARES linac spectrometer is currently under development. This detector fulfils the requirements of high spatial resolution for low charge density beams. The detector consists of two 1 cm x 1 cm silicon strip sensors and readout components. The design of the detector, its components and an estimate of its behaviour for a specific electron beam distribution are presented and discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2487 EP - 2490 KW - electron KW - detector KW - simulation KW - acceleration KW - linac DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPGW011 UR - http://jacow.org/ipac2019/papers/wepgw011.pdf ER - TY - CONF AU - Lockmann, N.M. AU - Gerth, C. AU - Peier, P. AU - Schmidt, B. AU - Wesch, S. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - A Non-Invasive THz Spectrometer for Bunch Length Characterization at European XFEL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The European X-ray Free-Electron Laser provides one of the most powerful X-ray laser pulses to a wide range of experiments. These experiments strongly benefit from the exact knowledge of the electron bunch current profile and demand for stable and shortest-possible pulse lengths. During the 2018 summer shutdown, the 4-staged grating spectrometer CRISP* has been installed at a diffraction radiation (DR) beamline just upstream of the undulator beamline switchyard. The DR at final electron beam energies of up to 17.5 GeV enables non-invasive bunch length characterization based on form factor measurements down to a few micrometers. Fast detectors and electronics allow for the characterization of the whole bunch train with repetition rates above 1 MHz. This contribution will present commissioning results of the THz beamline as well as first measured form factors and reconstructed electron current profiles. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2495 EP - 2497 KW - electron KW - FEL KW - radiation KW - diagnostics KW - factory DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPGW014 UR - http://jacow.org/ipac2019/papers/wepgw014.pdf ER - TY - CONF AU - Patil, M.M. AU - Bründermann, E. AU - Caselle, M. AU - Funkner, S. AU - Gerth, C. AU - Kehrer, B. AU - Makowski, D.R. AU - Mielczarek, A. AU - Müller, A.-S. AU - Niehues, G. AU - Wang, W. AU - Weber, M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - An Ultra-Fast and Wide-Spectrum Linear Array Detector for High Repetition Rate and Pulsed Experiments J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Photon science research at accelerators is influenced radically by the developments of sensor and readout technologies for imaging. These technologies enable a wide range of applications in beam diagnostics, tomography and spectroscopy. The repetition rate of commercially available linear array detectors is a limiting factor for the emerging synchrotron applications. To overcome these limitations, KALYPSO(Karlsruhe Linear arraY detector for MHz rePetition rateSpectrOscopy), an ultra-fast and wide-field of view linear array detector operating at several mega-frames per second(Mfps), has been developed. A silicon micro-strip sensor is connected to custom cutting-edge front end ASICs to achieve unprecedented frame rate in continuous readout mode. In this contribution, the third generation of KALYPSO will be presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2504 EP - 2506 KW - detector KW - experiment KW - radiation KW - electron KW - synchrotron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPGW018 UR - http://jacow.org/ipac2019/papers/wepgw018.pdf ER - TY - CONF AU - Bosotti, A. AU - Bertucci, M. AU - Bignami, A. AU - Michelato, P. AU - Monaco, L. AU - Paparella, R. AU - Reschke, D. AU - Sertore, D. AU - Sulimov, A. AU - Wiencek, M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Vertical Test of ESS Medium Beta Cavities J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Medium beta (β=0.67) section of the European Spallation Source (ESS) Linac is composed of 36 six-cell elliptical superconducting (SC) cavities. As a part to the in kind contribution of Italy to the ESS project, INFN-LASA is in charge of the development and of the industrial production of the whole set of 36 resonators plus two spares. The production activity is now ongoing at ZANON. To qualify the cavities power tests in vertical cryostat has been committed to DESY. During the qualification tests, where the cavities provided with He tanks are pushed to their electromagnetic limits, recording their main electromagnetics parameters such as quality factor Q₀ vs E_{acc}. In this paper we report about the qualification tests performed on the first part of the quality production. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2852 EP - 2855 KW - cavity KW - HOM KW - cryomodule KW - vacuum KW - linac DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB023 UR - http://jacow.org/ipac2019/papers/weprb023.pdf ER - TY - CONF AU - Bruni, C. AU - Baynard, E. AU - Cayla, J-N. AU - Chancé, S. AU - Chaumat, V. AU - Delerue, N. AU - ElKamchi, N. AU - Lepercq, P. AU - Lucas, B. AU - Neveu, O. AU - Pittman, M. AU - Purwar, H. AU - Vinatier, T. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Short Bunch Experiment at EXALT Facility J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Nowdays, different applications required short bunches, with low energy spread and low emittances. On EXALT facility, we perform an experiment with a short (few100 femtosecond) laser pulse on a photocathode in a 3 GHz RF gun. We perform the measurement of the single photon emission process with a copper cathode. We show that the longitudinal photoinjector model via transfer matrix is suitable for the reconstruction of the bunch duration even in short pulse mode with an increased accurracy charge below 20 pC. We clearly measure the parabolic profile in the energy spectrum resulting from blow out phenomena at the cathode due to strong space charge forces. Measurements are also compared with the Astra simulations. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3100 EP - 3102 KW - laser KW - cathode KW - experiment KW - electron KW - gun DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPTS007 UR - http://jacow.org/ipac2019/papers/wepts007.pdf ER - TY - CONF AU - Lechner, C. AU - Dohlus, M. AU - Faatz, B. AU - Grattoni, V. AU - Miltchev, V. AU - Paraskaki, G. AU - Rönsch-Schulenburg, J. AU - Schneidmiller, E. AU - Yurkov, M.V. AU - Zemella, J. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Experimental Test of Longitudinal Space-Charge Amplifier in Optical Range J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Longitudinal space-charge effects can act as a driver for short wavelength radiation production in a longitudinal space-charge amplifier (LSCA) *. A single cascade of an LSCA was tested using the hardware of the sFLASH experiment installed at the FEL user facility FLASH (at DESY, Hamburg). Scans of the longitudinal dispersion of the chicane were performed with the tightly focused electron beam for different compression settings, while recording the intensity of the emission from a few-period undulator. We present experimental results and estimates on electron beam properties. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3267 EP - 3270 KW - electron KW - undulator KW - laser KW - FEL KW - experiment DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPTS061 UR - http://jacow.org/ipac2019/papers/wepts061.pdf ER - TY - CONF AU - Ludwig, F. AU - Branlard, J. AU - Butkowski, Ł. AU - Czwalinna, M.K. AU - Hierholzer, M. AU - Hoffmann, M. AU - Killenberg, M. AU - Kuntzsch, M. AU - Lamb, T. AU - Marjanovic, J. AU - Mavrič, U. AU - Müller, J.M. AU - Pfeiffer, S. AU - Schlarb, H. AU - Schmidt, Ch. AU - Springer, L. AU - Zenker, K. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - RF Controls Towards Femtosecond and Attosecond Precision J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - In the past two decades, RF controls have improved by two orders in magnitude achieving meanwhile sub-10 fs phase stabilities and 10⁻⁴ amplitude precision. Advances are through improved field detection methods and massive usage of digital signal procession on very powerful field programmable gate arrays (FPGAs). The question rise, what can be achieved in the next 10 years? In this talk, a review is given of existing systems and strategies, current stability limitations of RF control system and new technologies with the potential to achieve attosecond resolutions. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3414 EP - 3418 KW - cavity KW - LLRF KW - controls KW - detector KW - FEL DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THYPLS1 UR - http://jacow.org/ipac2019/papers/thypls1.pdf ER - TY - CONF AU - Walter, T. AU - Mahns, I. AU - Schlarb, H. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - MICROTCA TECHNOLOGY LAB AT DESY: CURRENT CASES IN TECHNOLOGY TRANSFER J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - MicroTCA-based LLRF systems for beam control and beam diagnostics are gaining traction in many facilities around the world. Over the past decade, a comprehensive portfolio of hardware solutions (boards, crates, backplanes) has become available to cater for demanding signal processing applications in state-of-the-art facilities like the European XFEL. Gradually, industrial applications of MicroTCA also have become more common. In response various requests, DESY has opened the MicroTCA Technology Lab (A Helmholtz Innovation Lab) in April 2018 as a service unit for research and industry with a focus on: - Customer-specific developments in MicroTCA (hardware, firmware, software), - High-end test and measurement services, - Consulting and system integration. We report on intermediate results and emerging projects after one year of operation, with transfer examples from the industrial automation and medical technology sectors as well as overlapping developments for the physics research community. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3459 EP - 3461 KW - controls KW - operation KW - LLRF KW - hardware KW - electron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPMP007 UR - http://jacow.org/ipac2019/papers/thpmp007.pdf ER - TY - CONF AU - Burkart, F. AU - Aßmann, R.W. AU - Dorda, U. AU - Kärtner, F.X. AU - Marchetti, B. AU - Matlis, N.H. AU - Rohwer, T. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Commissioning-Stages and Radio-Protection Concept for the THz-Linac Based Accelerator "AXSIS" at DESY J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The dedicated accelerator R&D facility SINBAD at DESY hosts the AXSIS accelerator. This project is funded by the European Research Council to develop a compact source for attosecond serial X-ray crystallography and spectroscopy. For that purpose, in one of the arcs of the SINBAD facility and the neighboring laser labs, an accelerator research site is being constructed where a fully THz-driven accelerator (electron gun and linac, < 30MeV) will be installed. The current status of the hardware installation of the electron beam accelerator is presented. Furthermore, the required radio-protection measures and maximum beam parameters are presented. In this contribution the commissioning plans and the staging of the beam operation for the accelerator complex will be shown and discussed in detail. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3598 EP - 3600 KW - electron KW - MMI KW - laser KW - operation KW - linac DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW011 UR - http://jacow.org/ipac2019/papers/thpgw011.pdf ER - TY - CONF AU - Ferran Pousa, A. AU - Aßmann, R.W. AU - Martinez de la Ossa, A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Wake-T: A Fast Particle Tracking Code for Plasma-Based Accelerators J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The design and study of plasma-based accelerators relies typically on costly 3D Particle-In-Cell (PIC) simulations due to the complexity of the laser-plasma and beam-plasma interactions. However, under certain assumptions, more efficient and simple models can be implemented to describe the dynamics of the accelerated beams. Wake-T (Wakefield particle Tracker) is a new code for analytical and numerical particle tracking in plasma-based accelerators which is orders of magnitude faster than conventional PIC codes. This allows for fast parameter scans and is well suited for the initial design and optimization of these novel accelerators. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3601 EP - 3604 KW - plasma KW - simulation KW - emittance KW - electron KW - laser DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW012 UR - http://jacow.org/ipac2019/papers/thpgw012.pdf ER - TY - CONF AU - Genovese, L. AU - Aßmann, R.W. AU - Dorda, U. AU - Kellermeier, M. AU - Kuropka, W. AU - Lemery, F. AU - Mayet, F. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Tolerance Studies and Limitations for Photonic Bandgap Fiber Accelerators J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Laser-driven hollow core photonic bandgap (PBG) fibers were proposed by Lin in 2001 as high-gradient accelerators. The central defect in the transversely periodic lattice supports an accelerating mode for synchronous acceleration in the ultra-relativistic regime. The optical frequencies in such dielectric laser accelerators motivate a sensitivity and tolerance study to overcome manufacturing imperfections. Finally we discuss the propagation characteristics of Lin-fibers and find that small-bandwidth (~ns) pulses would be needed for efficient acceleration over longer distances. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3605 EP - 3608 KW - laser KW - acceleration KW - photon KW - simulation KW - electron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW014 UR - http://jacow.org/ipac2019/papers/thpgw014.pdf ER - TY - CONF AU - Rossmanith, R. AU - Aßmann, R.W. AU - Bernhard, A. AU - Burkart, F. AU - Damminsek, K. AU - Dorda, U. AU - Gethmann, J. AU - Jafarinia, F. AU - Kaluza, M. AU - Marchetti, B. AU - Richter, S. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Proposed Beam Test of a Transverse Gradient Undulator at the SINBAD Facility at DESY J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - While Laser Plasma Accelerators produce beams with the high output energy required for FELs, up to now the relatively high energy spread has prohibited FEL lasing. Therefore it was proposed to replace the normal FEL undulators by Transverse Gradient Undulators (TGUs). For a first, small scale test of the TGU concept, a 40 period prototype high gradient superconductive TGU was built at KIT and will be tested with beam at the ARES-linac in the new accelerator test facility SINBAD (Short Innovative Bunches and Accelerators at Desy) at DESY. The proposed tests are summarized in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3609 EP - 3611 KW - undulator KW - linac KW - electron KW - experiment KW - radiation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW015 UR - http://jacow.org/ipac2019/papers/thpgw015.pdf ER - TY - CONF AU - Lishilin, O. AU - Brinkmann, R. AU - Chen, Y. AU - Good, J.D. AU - Groß, M. AU - Grüner, F.J. AU - Isaev, I.I. AU - Koschitzki, C. AU - Krasilnikov, M. AU - Loisch, G. AU - Martinez de la Ossa, A. AU - Mehrling, T.J. AU - Melkumyan, D. AU - Niemczyk, R. AU - Oppelt, A. AU - Osterhoff, J. AU - Qian, H.J. AU - Schroeder, C.B. AU - Stephan, F. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Overview and Prospects of Plasma Wakefield Acceleration Experiments at PITZ J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Photo Injector Test Facility at DESY in Zeuthen (PITZ) carries out studies of beam-driven plasma wakefield acceleration (PWFA). The facility possesses a flexible photocathode laser beam shaping system and a variety of diagnostics including a high-resolution dipole spectrometer and an rf deflector which enables the observation of the longitudinal phase space of electron beams after their passage through a plasma. Two plasma sources are available: a gas discharge plasma cell and a photoionized lithium vapor plasma cell. Studies at PITZ include investigations of the self-modulation instability of long electron beams and the high transformer ratio, i.e., the ratio between the maximum accelerating field behind the drive beam and the decelerating field within the beam. This overview includes the experimental results and plans for future experiments. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3612 EP - 3615 KW - plasma KW - electron KW - wakefield KW - laser KW - experiment DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW016 UR - http://jacow.org/ipac2019/papers/thpgw016.pdf ER - TY - CONF AU - Lishilin, O. AU - Brinkmann, R. AU - Chen, Y. AU - Good, J.D. AU - Groß, M. AU - Grüner, F.J. AU - Isaev, I.I. AU - Koschitzki, C. AU - Krasilnikov, M. AU - Loisch, G. AU - Martinez de la Ossa, A. AU - Mehrling, T.J. AU - Oppelt, A. AU - Osterhoff, J. AU - Qian, H.J. AU - Schroeder, C.B. AU - Stephan, F. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Self-Modulation Instability of Electron Beams in Plasma Channels of Variable Length J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The self-modulation instability (SMI) of long (in respect to the plasma wavelength) charged particle beams passing through plasma enables the use of currently existing high energy charged particle beams as drivers for plasma wakefield accelerators. At the Photo Injector Test facility at DESY in Zeuthen (PITZ) the SMI of electron beams is studied *, **. An enhanced experimental setup includes a plasma channel of variable length which allows to investigate in details the development stages of the SMI by measuring the instability growth rate and phase velocity as a function of propagation distance in the plasma. In this contribution we present the experimental setup improvements, first measurement results and supporting beam dynamics simulations. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3616 EP - 3618 KW - plasma KW - wakefield KW - simulation KW - laser KW - electron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW017 UR - http://jacow.org/ipac2019/papers/thpgw017.pdf ER - TY - CONF AU - Niknejadi, P. AU - D'Arcy, R.T.P. AU - Ferrario, M. AU - Garland, J.M. AU - Lindstrøm, C.A. AU - Mehrling, T.J. AU - Osterhoff, J. AU - Romeo, S. AU - Schaper, L. AU - Schmidt, B. AU - Tauscher, G.E. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - FLASHforward Findings for the EuPRAXIA Design Study and the Next-Generation of Compact Accelerator Facilities J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - FLASHForward, the exploratory FLASH beamline for Future-ORiented Wakefield Accelerator Research and Development, is a European pilot test bed facility for accelerating electron beams to GeV-levels in a few centimeters of ionized gas. The main focus is on the advancement of plasma-based particle acceleration technology through investigation of injection schemes, novel concepts and diagnostics, as well as benchmarking theoretical studies and simulations. Since the plasma wakefield will be driven by the optimal high-current-density electron beams extracted from the FLASH L-band Superconducting RF accelerator, FLASHForward has been in a unique position for studying and providing insight for the design study of next-generation light source and high energy physics facilities such as EuPRAXIA*. Summary of these findings and their broader impact is discussed here. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3619 EP - 3623 KW - plasma KW - wakefield KW - focusing KW - electron KW - laser DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW019 UR - http://jacow.org/ipac2019/papers/thpgw019.pdf ER - TY - CONF AU - Svystun, E.N. AU - Aßmann, R.W. AU - Dorda, U. AU - Marchetti, B. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - The Effect of the Transverse Beam Jitter on the Accelerated Electron Beam Quality in a Laser-Driven Plasma Accelerator with External Injection at SINBAD for ATHENAe J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Laser plasma accelerators with external injection of an RF-generated electron beam, providing high accelerating field gradients and increased control over the electron beam injection process, are promising candidates for production electron beams matching the requirements of modern user-applications. The experiments are planned at the SINBAD (Short INnovative Bunches and Accelerators at DESY) facility to test this acceleration technique in the context of the ATHENAe (Accelerator Technology HElmholtz iNfrAstructure) project. In this paper we present numerical studies on the effect of the transverse electron beam jitter on the final quality of a sub-femtosecond, 0.75 pC, 100 MeV electron beam accelerated to 1 GeV energy in the plasma wakefield driven by a 196 TW, 5 J laser pulse. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3624 EP - 3627 KW - plasma KW - electron KW - laser KW - injection KW - acceleration DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW022 UR - http://jacow.org/ipac2019/papers/thpgw022.pdf ER - TY - CONF AU - Svystun, E.N. AU - Aßmann, R.W. AU - Dorda, U. AU - Marchetti, B. AU - Martinez de la Ossa, A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Numerical Studies on Electron Beam Quality Optimization in a Laser-Driven Plasma Accelerator with External Injection at SINBAD for ATHENAe J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Nowadays the electron beams produced in plasma-based accelerators (PBAs) are of sufficient energy for multi-GeV applications. However, to allow PBAs to be usable for demanding applications such as Free-Electron Lasers, the quality and stability of plasma-accelerated beams have to be improved. We present numerical studies on accelera-tion of an RF-generated electron beam with a charge of 0.8 pC and initial mean energy of 100 MeV to GeV energies by a laser-plasma accelerator. This acceleration scheme is planned to be tested experimentally within the framework of the ATHENAe (Accelerator Technology HElmholtz iNfrAstructure) project at the SINBAD (Short INnovative Bunches and Accelerators at DESY) facility at DESY, Hamburg. Electron beam injection, acceleration and extraction from the plasma are investigated through start-to-end 3D simulations. The effect of the injection phase on the accelerated beam quality is investigated through tolerance studies on the arrival-time jitter between the electron beam and the external laser. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3628 EP - 3631 KW - plasma KW - electron KW - laser KW - acceleration KW - injection DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW023 UR - http://jacow.org/ipac2019/papers/thpgw023.pdf ER - TY - CONF AU - Walker, P.A. AU - Aßmann, R.W. AU - Chiadroni, E. AU - Dorda, U. AU - Ferrario, M. AU - Marchetti, B. AU - Specka, A. AU - Walczak, R. AU - Weikum, M.K. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Facility Considerations for a European Plasma Accelerator Infrastructure (EuPRAXIA) J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - EuPRAXIA (European Plasma Research Accelerator with eXcellence In Applications) is a conceptual design study for a compact European infrastructure with multi-GeV electron beams based on plasma accelerators. The concept foresees two main experimental sites, one at INFN in Frascati and one at DESY in Hamburg. In Frascati, an RF injector based on S-band and X-band technology (electron energy up to 1 GeV) will be constructed and used as a drive beam for beam driven plasma acceleration (PWFA) with final electron beam energies up to 5 GeV. At DESY, the focus will be on laser driven plasma acceleration (LWFA) and an RF injector based on S-band technology (electron energy up to 240 MeV) or alternatively a plasma injector (electron energy up to 150 MeV) can be used before the beam is injected into the plasma accelerator for external LWFA and acceleration up to 5 GeV. A single stage approach based on LWFA with internal injection will also be pursued in a second beamline. User areas at both sites will provide access to FEL pilot experiments, positron generation, compact radiation sources, and test beams for HEP detector development. This contribution discusses facility space considerations for the future plasma accelerator research infrastructure of EuPRAXIA. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3635 EP - 3637 KW - plasma KW - laser KW - electron KW - site KW - positron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW025 UR - http://jacow.org/ipac2019/papers/thpgw025.pdf ER - TY - CONF AU - Weikum, M.K. AU - Akhter, T. AU - Alesini, D. AU - Alexandrova, A.S. AU - Anania, M.P. AU - Andreev, N.E. AU - Andriyash, I.A. AU - Aschikhin, A. AU - Audet, T. AU - Aßmann, R.W. AU - Bacci, A. AU - Barna, I.F. AU - Beaton, A. AU - Beck, A. AU - Beluze, A. AU - Bernhard, A. AU - Bielawski, S. AU - Bisesto, F.G. AU - Brandi, F. AU - Brinkmann, R. AU - Bründermann, E. AU - Bussmann, M.H. AU - Bussolino, G. AU - Büscher, M. AU - Chancé, A. AU - Chen, M. AU - Chiadroni, E. AU - Cianchi, A. AU - Clarke, J.A. AU - Cole, J. AU - Couprie, M.-E. AU - Croia, M. AU - Cros, B. AU - Crump, P.A. AU - Dattoli, G. AU - De Nicola, S. AU - Del Dotto, A. AU - Delerue, N. AU - Dias, J.M. AU - Dorda, U. AU - Fedele, R. AU - Ferran Pousa, A. AU - Ferrario, M. AU - Filippi, F. AU - Fiore, G. AU - Fonseca, R.A. AU - Galimberti, M. AU - Gallo, A. AU - Ghaith, A. AU - Giove, D. AU - Giribono, A. AU - Gizzi, L.A. AU - Grüner, F.J. AU - Habib, A.F. AU - Haefner, C. AU - Heinemann, T. AU - Hidding, B. AU - Holzer, B.J. AU - Hooker, S.M. AU - Hosokai, T. AU - Huebner, M. AU - Irman, A. AU - Jafarinia, F. AU - Jaroszynski, D.A. AU - Joshi, C. AU - Kaluza, M. AU - Kando, M. AU - Karger, O.S. AU - Karsch, S. AU - Khazanov, E. AU - Khikhlukha, D. AU - Knetsch, A. AU - Kocon, D. AU - Koester, P. AU - Kononenko, O.S. AU - Korn, G. AU - Kostyukov, I. AU - Kruchinin, K.O. AU - Labate, L. AU - Le Blanc, C. AU - Lechner, C. AU - Leemans, W. AU - Lehrach, A. AU - Li, X. AU - Libov, V. AU - Lifschitz, A. AU - Litvinenko, V. AU - Lu, W. AU - Lundh, O. AU - Maier, A.R. AU - Malka, V. AU - Manahan, G.G. AU - Mangles, S.P.D. AU - Marchetti, B. AU - Martinez de la Ossa, A. AU - Martins, J.L. AU - Mason, P.D. AU - Massimo, F. AU - Mathieu, F. AU - Maynard, G. AU - Mazzotta, Z. AU - Molodozhentsev, A.Y. AU - Mostacci, A. AU - Murphy, C.D. AU - Müller, A.-S. AU - Najmudin, Z. AU - Nghiem, P.A.P. AU - Nguyen, F. AU - Niknejadi, P. AU - Osterhoff, J. AU - Oumbarek Espinos, D. AU - Papadopoulos, D.N. AU - Patrizi, B. AU - Pattathil, R. AU - Petrillo, V. AU - Pocsai, M.A. AU - Poder, K. AU - Pompili, R. AU - Pribyl, L. AU - Pugacheva, D. AU - Romeo, S. AU - Rossetti Conti, M. AU - Rossi, A.R. AU - Rossmanith, R. AU - Roussel, E. AU - Sahai, A.A. AU - Sarri, G. AU - Schaper, L. AU - Scherkl, P. AU - Schramm, U. AU - Schroeder, C.B. AU - Scifo, J. AU - Serafini, L. AU - Sheng, Z.M. AU - Siders, C. AU - Silva, L.O. AU - Silva, T. AU - Simon, C. AU - Sinha, U. AU - Specka, A. AU - Streeter, M.J.V. AU - Svystun, E.N. AU - Symes, D. AU - Szwaj, C. AU - Tauscher, G.E. AU - Terzani, D. AU - Thompson, N. AU - Toci, G. AU - Tomassini, P. AU - Torres, R. AU - Ullmann, D. AU - Vaccarezza, C. AU - Vannini, M. AU - Vieira, J.M. AU - Villa, F. AU - Wahlstrom, C.-G. AU - Walczak, R. AU - Walker, P.A. AU - Wang, K. AU - Welsch, C.P. AU - Wiggins, S.M. AU - Wolfenden, J. AU - Xia, G.X. AU - Yabashi, M. AU - Zhu, J. AU - Zigler, A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status of the Horizon 2020 EuPRAXIA Conceptual Design Study J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Horizon 2020 Project EuPRAXIA (European Plasma Research Accelerator with eXcellence In Applications) is producing a conceptual design report for a highly compact and cost-effective European facility with multi-GeV electron beams accelerated using plasmas. EuPRAXIA will be set up as a distributed Open Innovation platform with two construction sites, one with a focus on beam-driven plasma acceleration (PWFA) and another site with a focus on laser-driven plasma acceleration (LWFA). User areas at both sites will provide access to FEL pilot experiments, positron generation and acceleration, compact radiation sources, and test beams for HEP detector development. Support centres in four different countries will complement the pan-European implementation of this infrastructure. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3638 EP - 3642 KW - plasma KW - laser KW - electron KW - acceleration KW - site DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW026 UR - http://jacow.org/ipac2019/papers/thpgw026.pdf ER - TY - CONF AU - Syresin, E. AU - Brovko, O.I. AU - Freund, W. AU - Grebentsov, A.Yu. AU - Grünert, J. AU - Yurkov, M.V. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - MCP Based Detectors of European XFEL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Radiation detectors based on microchannel plates (MCP) are used for measurements of the SASE process of the European XFEL. Detectors operate in a wide dynamic range from the level of spontaneous emission to the saturation level (between a few nJ and 25 mJ) and in a wide wavelength range from 0.05 nm to 0.4 nm for SASE1 and SASE2 and from 0.4 nm to 4.43 nm for SASE3. Photon pulse energies are measured by the MCPs with an anode and by a photodiode. The MCP imager measures the photon beam image with a phosphor screen. Three MCP detectors are installed, one behind each SASE undulator (SASE1, SASE2, and SASE3). Calibration and first experiments with the MCP detectors are under discussion. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3703 EP - 3705 KW - FEL KW - detector KW - photon KW - radiation KW - electron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW051 UR - http://jacow.org/ipac2019/papers/thpgw051.pdf ER - TY - CONF AU - Lamb, T. AU - Czwalinna, M.K. AU - Felber, M. AU - Gerth, C. AU - Kozak, T. AU - Müller, J.M. AU - Schlarb, H. AU - Schulz, S. AU - Sydlo, C. AU - Titberidze, M. AU - Zummack, F. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Large-Scale Optical Synchronization System of the European XFEL with Femtosecond Precision J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Femtosecond pulsed optical synchronization systems have evolved over the last few years and are now a mature technique to synchronize FELs. A large-scale femtosecond-precision synchronization system with up to 44 end-stations has been constructed at the European XFEL to meet the FEL synchronization stability requirements. The synchronization system is used to phase-lock various laser systems with femtosecond accuracy, to precisely measure the electron bunch arrival time along the accelerator for fast arrival time feedbacks and to locally phase stabilize the phase of the RF reference signals for the accelerator RF controls on a femtosecond level. The architecture of the large-scale synchronization system and design choices made to achieve the reliability, maintainability and performance requirements are presented together with measurement results from the past year of operation. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3835 EP - 3838 KW - laser KW - FEL KW - electron KW - FEM KW - controls DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPRB018 UR - http://jacow.org/ipac2019/papers/thprb018.pdf ER - TY - CONF AU - Mattiello, S. AU - Penirschke, A. AU - Schlarb, H. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - A Feedback System to Minimize the Electron Bunch Arrival-Time Jitter Between Femtosecond Laser Pulses and Electron Bunches for Laser-Driven Plasma Wakefield Accelerators J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - In a laser driven plasma based particle accelerator a stable synchronization of the electron bunch and of the plasma wake field in the range of less than 2 fs is necessary in order to optimize the acceleration. For this purpose we are developing a new shot to shot feedback system with a time resolution of less than 1 fs*. We plane to generate stable THz pulses by optical rectification of a fraction of the plasma generating high energy laser pulses in a nonlinear lithium niobate crystal. With these pulses we will energy modulate the electron bunches shot to shot before the plasma to achieve the time resolution. In this contribution we will focus on realization aspects of the shot to shot feedback system and the lithium niobate crystal itself. Here we compare different approximations for the modeling of the generation dynamics (second order or first order calculation) and of the dielectric function (influence of the dispersion relation, of the free carries generated by the pump adsorption and their saturation, depletion of the pump) in order to investigate the importance of a detailed description of the optical properties for the THz generation. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3843 EP - 3846 KW - laser KW - plasma KW - electron KW - feedback KW - optics DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPRB020 UR - http://jacow.org/ipac2019/papers/thprb020.pdf ER - TY - CONF AU - Mavrič, U. AU - Hoffmann, M. AU - Ludwig, F. AU - Schlarb, H. AU - Springer, L. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Automatic Loop for Carrier Suppression in Attosecond RF Receivers J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The carrier suppression interferometer method can be used as a radio receiver architecture which allows for detection of RF signals in the attosecond range. The carrier suppression scheme requires an automatic carrier suppression circuit which provides stable operation of the RF receiver in the best operating point. In the poster we investigate the requirements for such an algorithm, evaluate the achievable closed loop bandwidth and the side effects on the overall-performance. In addition we apply the carrier tracking to simplify and automate the characterization of various electronic phase shifters and attenuators in the as-range PB - JACoW Publishing CP - Geneva, Switzerland SP - 3847 EP - 3849 KW - controls KW - operation KW - electron KW - FPGA KW - electronics DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPRB021 UR - http://jacow.org/ipac2019/papers/thprb021.pdf ER - TY - CONF AU - Przygoda, K.P. AU - Butkowski, Ł. AU - Pfeiffer, S. AU - Schlarb, H. AU - Wiljes, P. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - An MTCA.4 Based Position Feedback Application Using Laserinterferometers J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - To perform experiments on the nanometer scale at high brilliant x-ray light sources, it is highly recommended to have the mechanical components of the experiment, like lenses, mirrors and samples, as stable as possible. Since these components need to move from nanometer up to millimeter range they cannot be stabilized by only using rigid structures. For that reason an active stabilization system with fast and precise sensors needs to be developed. Here a Laserinterferometer is used, which provides picometer resolution at several MHz sample rate. In this paper we will present a laboratory setup which consists of a 6-slot Micro Telecommunication Computing Architecture generation 4 (MTCA.4) crate with standard components such MicroTCA carrier hub (MCH), central processing unit (CPU), power supply (PS) and cooling unit (CU). The Interferometer application has been setup with Deutsches Elektronen-Synchrotron (DESY) advanced mezzanine card (DAMC-FMC20) data processing unit, DESY Field Programmable Gate Array (FPGA) mezzanine card (DFMC-UNIO) universal input and output extension and DESY rear transition module (DRTM-PZT4) piezo driver. The encoder signals given by the interferometer controller are processed within the FPGA and then forwarded to the piezo amplifier RTM-board. The signal processing application includes decoding the digital feedback signal, calculating the coordinate transform for specific experimental setups and closed-loop operation based on a proportional integral derivative (PID) controller. The first results of the laboratory setup are demonstrated and briefly discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3853 EP - 3855 KW - laser KW - experiment KW - controls KW - feedback KW - interface DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPRB023 UR - http://jacow.org/ipac2019/papers/thprb023.pdf ER - TY - CONF AU - Przygoda, K.P. AU - Branlard, J. AU - Butkowski, Ł. AU - Grecki, M.K. AU - Hierholzer, M. AU - Omet, M. AU - Schlarb, H. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Piezo Controls For The European XFEL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The European X-Ray Free Electron Laser (E-XFEL) accelerator is a pulse machine. The typical time duration of a radio frequency (RF) pulse is about 1.3 ms. The RF power transmitted to the superconducting RF (SCRF) cavity as a set of successive pulses (10 Hz repetition rate), causes strong mechanical stresses inside the cavity. The mechanical deformations of the RF cavity are typically caused by the Lorentz force detuning (LFD). The cavity can be tuned to a 1.3 GHz resonance frequency during the RF pulse using fast piezo tuners. Since the E-XFEL will use around 800 cavities (each cavity with double piezos), a distributed architecture with multi-channel digital and analog control circuits seems to be essential. The most sought-after issue is high-voltage, high-current piezo driving circuit dedicated to multi-channel configuration. The driving electronics should allow a maximum piezo protection against any kind of failure. The careful automation of the piezo tuners control and its demonstration for the high gradient conditions a real challenge. The first demonstration of piezo controls applied for chosen RF stations of the E-XFEL linear accelerator (linac) are presented and obtained results are briefly discussed within this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3856 EP - 3859 KW - cavity KW - controls KW - FEL KW - linac KW - LLRF DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPRB024 UR - http://jacow.org/ipac2019/papers/thprb024.pdf ER - TY - CONF AU - Przygoda, K.P. AU - Butkowski, Ł. AU - Fenner, M. AU - Hierholzer, M. AU - Rybaniec, R. AU - Schlarb, H. AU - Schmidt, Ch. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - New MicroTCA Piezo Driver (PZT4) J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - In the paper we would like to present a new Micro Telecommunication Computing Architecture (MicroTCA) piezo driver (PZT4). The piezo driver module is capable of driving of 4 piezo actuators with high voltages up to 160 Vpp. It is also possible to measure cavity mechanical vibrations using 4 analog to digital converters (ADC) ported to the driver electronics. The new piezo driver can be supplied using internal 12 V payload power provided by the MicroTCA standard. For the applications that need more than 30 W of the input power, the external power supply module can be provided. In order to protect the piezo driver electronics against output short condition a dedicated supervision circuit is designed. The piezo driver module has been setup at Cryo Module Test Bench (CMTB) facility in Deutsches-Elektronen Synchrotron (DESY) as a part of the single cavity low-level radio frequency (LLRF) controls. The LLRF control system has been used to demonstrate the radio frequency (RF) field stabilization and cavity tuning capabilities for continuous (CW) and pulse modes of operation of 1.3 GHz superconducting resonant RF (SCRF) cavity. The preliminary results are demonstrated and briefly discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3860 EP - 3863 KW - cavity KW - high-voltage KW - controls KW - operation KW - power-supply DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPRB025 UR - http://jacow.org/ipac2019/papers/thprb025.pdf ER - TY - CONF AU - Troeng, O. AU - Eshraqi, M. AU - Johansson, A.J. AU - Pfeiffer, S. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Field Control Challenges for Different LINAC Types J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Linacs for free-electron lasers typically require cavity field stabilities of 0.01\% and 0.01 degree, while the requirements for high-intensity proton linacs are on the order of 0.1–1\% and 0.1–1 degrees. From these numbers it is easy to believe that the field control problem for proton linacs is many times easier than for free-electron lasers linacs. In this contribution we explain why this is not necessarily the case, and discuss the factors that make field control challenging. We also discuss the drivers for field stability, and how high-level decisions on the linac design affect the difficulty of the field control problem. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3946 EP - 3949 KW - cavity KW - controls KW - linac KW - FEL KW - electron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPRB063 UR - http://jacow.org/ipac2019/papers/thprb063.pdf ER - TY - CONF AU - Nonn, P. AU - Gümüş, Ç. AU - Kampmeyer, C.K. AU - Schlarb, H. AU - Schmidt, Ch. AU - Walter, T. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - MicroTCA Based LLRF Control Systems for TARLA and NICA J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The MicroTCA Technology Lab (A Helmholtz Innovation Lab) is preparing two turn-key Low Level RF control systems for facilities outside of DESY. The Turkish Accelerator and Radiation Laboratory in Ankara (TARLA) is a 40 MeV electron accelerator with continuous wave (CW) RF operation. The MicroTCA based LLRF control system is responsible for two normal conducting and four superconducting cavities, controlling the RF as well as cavity tuning via motors and piezos. The Light Ion Linac (LILAC) is one of the injectors for the Nuclotron-based Ion Collider Facility (NICA) in Dubna, Russia. It will provide a 7 MeV/u pulsed, polarized proton or deuteron beam. The MicroTCA based LLRF control system will control five normal conducting cavities, consisting of one RFQ, one buncher, one debuncher and two IH-cavities. MicroTCA Technology Lab is cooperating with BEVATECH GmbH, Frankfurt, Germany, who designed the cavities. This paper gives a brief overview of the design of both LLRF systems as well as the status of their assembly. PB - JACoW Publishing CP - Geneva, Switzerland SP - 4089 EP - 4091 KW - LLRF KW - cavity KW - controls KW - operation KW - electron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPRB115 UR - http://jacow.org/ipac2019/papers/thprb115.pdf ER -