TY - CONF AU - Biagini, M.E. AU - Antonelli, M. AU - Bacci, A. AU - Bauce, M. AU - Blanco-García, O.R. AU - Boscolo, M. AU - Cesarini, G. AU - Chaikovska, I. AU - Chehab, R. AU - Ciarma, A. AU - Collamati, F. AU - Giribono, A. AU - Guiducci, S. AU - Liuzzo, S.M. AU - Lucchesi, D. AU - Pastrone, N. AU - Raimondi, P. AU - Vaccarezza, C. AU - Variola, A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Positron Driven Muon Source for a Muon Collider: Recent Developments 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 of a future multi-TeV muon collider needs new ideas to overcome the technological challenges related to muon production, cooling, accumulation and acceleration. The Low Emittance Muon Accelerator (LEMMA) concept *,** presents in this paper an upgraded layout of a positron driven muon source. The positron beam, stored in a ring with high energy acceptance and low emittance, is extracted and driven in a push-pull configuration to a multi-target system, to produce muon pairs at threshold on the target’s electrons. This solution alleviates the issues related to the power deposited and the integrated Peak Energy Density Deposition on the targets. Muons produced in the multi-target system will then be accumulated in many parallel rings before acceleration and injection in the collider. A special multi-target line lattice has been designed to cope with the focusing of both the positron and muon beams. Studies on the number, material and thickness of the targets have been carried out. A general layout of the overall scheme and a description is presented, as well as plans for future R&D. PB - JACoW Publishing CP - Geneva, Switzerland SP - 49 EP - 52 KW - target KW - emittance KW - damping KW - collider KW - positron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOZZPLS2 UR - http://jacow.org/ipac2019/papers/mozzpls2.pdf ER - TY - CONF AU - Korysko, P. AU - Burrows, P. AU - Faus-Golfe, A. AU - Kubo, K. AU - Latina, A. AU - Okugi, T. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Intensity Dependent Effects at ATF2, KEK 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 Test Facility 2 (ATF2) at KEK is a prototype for the Final Focus Systems of the future e⁺e⁻ linear colliders, the International Linear Collider (ILC) and the Compact Linear Collider (CLIC). In this paper both simulation and experimental results are presented with special emphasis on intensity-dependent effects. The importance of these effects is shown using the PLACET code and realistic ATF2 machine simulations (including beam jitter, misalignment, wakefield, Beam Based Alignment (BBA) correction, …). The latest experimental results are also presented, in particular the impact of the beam intensity on the beam size at the IP. PB - JACoW Publishing CP - Geneva, Switzerland SP - 308 EP - 311 KW - simulation KW - collider KW - linear-collider KW - wakefield KW - electron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPGW086 UR - http://jacow.org/ipac2019/papers/mopgw086.pdf ER - TY - CONF AU - Ogur, S. AU - Barnyakov, A.M. AU - Chaikovska, I. AU - Chehab, R. AU - Furukawa, K. AU - Iida, N. AU - Kamitani, T. AU - Levichev, A.E. AU - Martyshkin, P.V. AU - Miyahara, F. AU - Nikiforov, D.A. AU - Oide, K. AU - Ozcan, E.V. AU - Papaphilippou, Y. AU - Polozov, S.M. AU - Rinolfi, L. AU - Yaman, F. AU - Zimmermann, F. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Linac and Damping Ring Designs for the FCC-ee 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 design of the pre-injector chain for the Future Circular e⁺ e⁻ Collider (FCC-ee) system. The electron beam from a low-emittance RF gun is accelerated by an S-band linac up to 6 GeV. A damping ring at 1.54 GeV is required for emittance cooling of the positron beam. The intermediate energy step from the exit of the S-band linac at 6 GeV to the 20 GeV injection energy of the top-up booster can be provided by the modified Super Proton Synchrotron (SPS), serving as a pre-booster ring (PBR). An alternative option to reach 20 GeV energy would be to extend the S-band linac with a C- or X-band linac. An overall cost optimisation will determine the choice of the final configuration. Beam loss and emittance dilution in the linac due to space charge effects, wakefields, and misalignment of accelerator components can be mitigated by RF phasing and orbit steering. Start-to-end simulations examine the beam transport through the linac up to either 6 GeV or 20 GeV. The results indicate large design margins. Simulations of the beam dynamics in the damping ring (DR) demonstrate a sufficiently large momentum acceptance. Effects of intrabeam scattering and electron cloud instability in the DR are also studied. PB - JACoW Publishing CP - Geneva, Switzerland SP - 420 EP - 423 KW - linac KW - emittance KW - positron KW - gun KW - electron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPMP002 UR - http://jacow.org/ipac2019/papers/mopmp002.pdf ER - TY - CONF AU - Chaikovska, I. AU - Apyan, A. AU - Chehab, R. AU - Enomoto, Y. AU - Faus-Golfe, A. AU - Furukawa, K. AU - Han, Y. AU - Kamitani, T. AU - Martyshkin, P.V. AU - Miyahara, F. AU - Ogur, S. AU - Oide, K. AU - Papaphilippou, Y. AU - Rinolfi, L. AU - Satoh, M. AU - Seimiya, Y. AU - Sievers, P. AU - Suwada, T. AU - Zimmermann, F. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Positron Source for FCC-ee J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The FCC-ee is a high-luminosity, high-precision circular collider to be constructed in a new 100 km tunnel in the Geneva area. The physics case is well established and the FCC-ee operation is foreseen at 91 GeV (Z-pole), 160 GeV (W pair production threshold), 240 GeV (Higgs resonance) and 365 GeV (t-tbar threshold). Due to the large 6D production emittance and important thermal load in the production target, the positron injector, in particular the positron source, is one of the key elements of the FCC-ee, requiring special attention. To ensure high reliability of the positron source, conventional and hybrid targets are currently under study. The final choice of the positron target will be made based on the estimated performances. In this framework, we present a preliminary design of the FCC-ee positron source, with detailed simulation studies of positron production, capture and primary acceleration. PB - JACoW Publishing CP - Geneva, Switzerland SP - 424 EP - 427 KW - positron KW - target KW - linac KW - electron KW - collider DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPMP003 UR - http://jacow.org/ipac2019/papers/mopmp003.pdf ER - TY - CONF AU - Blanco-García, O.R. AU - Antonelli, M. AU - Biagini, M.E. AU - Boscolo, M. AU - Cesarini, G. AU - Ciarma, A. AU - Collamati, F. AU - Guiducci, S. AU - Li Voti, R. AU - Raimondi, P. AU - Vaccarezza, C. AU - Variola, A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Multi-Target Lattice for Muon Production From e⁺ Beam Annihilation on Target J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Low Emittance Muon Accelerator~(LEMMA) aims at producing small emittance muons from positron annihilation with electrons in a target. Given the low cross section of the production process, a large number of positrons on the target are required, exposing it to high power deposition and the beam to large degradation because of multiple scattering and bremstrahlung. A multi-target IP, and multi-IP line has been studied to reduce the power deposition per target and the degradation of the positron beam while preserving the number of muon pairs produced. The lattice copes with the focusing and transport of three beams at two different energies, the positron beam at 45 GeV, and µ⁺+ and µ⁻ beams at 22.5~GeV. Studies on the beam dynamics, number of targets, material and thickness of the targets are reported in this paper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 578 EP - 581 KW - target KW - positron KW - emittance KW - lattice KW - site DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPRB003 UR - http://jacow.org/ipac2019/papers/moprb003.pdf ER - TY - CONF AU - Nagaoka, R. AU - Bence, A. AU - Brunelle, P. AU - Gamelin, A. AU - Hoummi, L. AU - Loulergue, A. AU - Nadji, A. AU - Nadolski, L.S. AU - Tordeux, M.-A. AU - Vivoli, A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Study of Higher-Order Achromat Lattice as an Alternative Option for the SOLEIL Storage Ring Upgrade J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - A ring composed of 20 symmetrical 7BA cells in which of a pair of chromaticity correcting sextupoles placed around horizontal dispersion bumps à la ESRF-EBS was developed as a baseline lattice for the SOLEIL storage ring upgrade (presented at IPAC2018). The strict phase relation between the two dispersion bumps provides an efficient way of optimizing the (on-momentum) nonlinear optics with a limited number of sextupoles. As an alternative, a scheme known as Higher-Order Achromat (HOA) develops a MBA (Multi-Bend Achromat) lattice where chromaticity correcting sextupoles are distributed in each M unit cell with a strict phase relation cell-wise such as to cancel basic geometric and chromatic resonance driving terms. The beam dynamics in a 20-fold 7BA HOA ring is compared with those of the baseline lattice, with focus on off-momentum properties such as Touschek lifetime, which are important for medium energy rings like SOLEIL. The robustness against errors, the reduction of the ring symmetry by introducing 4 longer straight sections, as well as a horizontal dispersion bump to cope with longitudinal on-axis injection scheme are also presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 586 EP - 589 KW - lattice KW - sextupole KW - storage-ring KW - octupole KW - injection DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPRB005 UR - http://jacow.org/ipac2019/papers/moprb005.pdf ER - TY - CONF AU - Bruce, R. AU - Abramov, A. AU - Bertarelli, A. AU - Besana, M.I. AU - Carra, F. AU - Cerutti, F. AU - Faus-Golfe, A. AU - Fiascaris, M. AU - Gobbi, G. AU - Krainer, A.M. AU - Lechner, A. AU - Mereghetti, A. AU - Mirarchi, D. AU - Molson, J. AU - Pasquali, M. AU - Redaelli, S. AU - Schulte, D. AU - Serluca, M. AU - Skordis, E. AU - Varasteh Anvar, M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Collimation System Studies for the FCC-hh J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Future Circular Collider (FCC-hh) is being designed as a 100 km ring that should collide 50 TeV proton beams. At 8.3 GJ, its stored beam energy will be a factor 28 higher than what has been achieved in the Large Hadron Collider, which has the highest stored beam energy among the colliders built so far. This puts unprecedented demands on the control of beam losses and collimation, since even a tiny beam loss risks quenching superconducting magnets. We present in this article the design of the FCC-hh collimation system and study the beam cleaning through simulations of tracking, energy deposition, and thermo-mechanical response. We investigate the collimation performance for design beam loss scenarios and potential bottlenecks are highlighted. PB - JACoW Publishing CP - Geneva, Switzerland SP - 669 EP - 672 KW - collimation KW - proton KW - collider KW - simulation KW - hadron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPRB048 UR - http://jacow.org/ipac2019/papers/moprb048.pdf ER - TY - CONF AU - Dutheil, Y. AU - Alden, S.E. AU - Alemany-Fernández, R. AU - Apyan, A. AU - Bartosik, H. AU - Bessonov, E.G. AU - Biancacci, N. AU - Bosco, A. AU - Bruce, R. AU - Castelli, F. AU - Curatolo, C. AU - Czodrowski, P. AU - Fedosseev, V. AU - Gibson, S.M. AU - Goddard, B. AU - Hirlaender, S. AU - Jowett, J.M. AU - Kersevan, R. AU - Kowalska, M. AU - Kroeger, K. AU - Lamont, M. AU - Manglunki, D. AU - Martens, A. AU - Molson, J. AU - Nevay, L.J. AU - Petrenko, A.V. AU - Petrillo, V. AU - Sapinski, M. AU - Schaumann, M. AU - Serafini, L. AU - Stöhlker, T. AU - Weber, G. AU - Wu, Y.K. AU - Zimmermann, F. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Gamma Factory at CERN: Design of a Proof-of-Principle Experiment J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Gamma Factory (GF) initiative proposes to create novel research tools at CERN by producing, accelerating and storing highly relativistic partially stripped ion beams in the LHC rings and by exciting their atomic degrees of freedom by lasers, to produce high-energy photon beams. Their intensity would be several orders of magnitude higher than those of the presently operating light sources in the particularly interesting gamma-ray energy domain reaching up to 400 MeV. In this energy domain, the high-intensity photon beams can be used to produce secondary beams of polarized electrons, polarized positrons, polarized muons, neutrinos, neutrons and radioactive ions. Over the years 2017-2018 we have demonstrated that these partially stripped ion beams can be successfully produced, accelerated and stored in the CERN accelerator complex, including the LHC. The next step of the project is to build a proof of principle experiment in the SPS to validate the principal GF concepts. This contribution will present the initial conceptual design of this experiment along with its main challenge - the demonstration of the fast cooling method of partially stripped ion beams. PB - JACoW Publishing CP - Geneva, Switzerland SP - 685 EP - 688 KW - photon KW - laser KW - experiment KW - electron KW - cavity DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPRB052 UR - http://jacow.org/ipac2019/papers/moprb052.pdf ER - TY - CONF AU - Bilgen, S. AU - Baglin, V. AU - Bruni, C. AU - Mercier, B. AU - Sattonnay, G. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Dynamic Pressure in the LHC - Influence of Ions Induced by Ionization of Residual Gas by Both the Proton Beam and the Electron Cloud J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Ultra-High Vacuum is an essential requirement to reach design performances in high-energy particle colliders. For the future HL-LHC or FCC study, the understanding of the beam interactions with the vacuum chamber is fundamental to provide solutions to mitigate the pressure rises induced by electronic, photonic and ionic molecular desorption. Studies were performed on the ions, produced by molecular ionization generated by the proton beam and the electron cloud, and stimulating molecular desorption by the surface bombardment. In-situ measurements were carried out, on the LHC Vacuum Pilot Sector (VPS)*, to monitor the dynamic pressure, and to collect the electrical signals due to the electron cloud and to the ions interacting with the vacuum chamber walls. Experimental measurements of electrical signals recorded by copper electrodes were compared to calculations taking into account both the Secondary Electron Yield of copper and electron energy distribution. Finally, it seems that copper electrodes were not fully conditioned and an ion current could be estimated. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1236 EP - 1239 KW - electron KW - proton KW - vacuum KW - experiment KW - ECR DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPMP004 UR - http://jacow.org/ipac2019/papers/tupmp004.pdf ER - TY - CONF AU - Sattonnay, G. AU - Baglin, V. AU - Bilgen, S. AU - Mercier, B. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - DYVACS (DYnamic VACuum Simulation) Code: Calculation of Gas Density Profiles in Presence of Electron Cloud J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The computation of residual gas density profiles in particle accelerators is an essential task to optimize beam pipes and vacuum system design. In a hadron collider such as the LHC, the beam induces dynamic effects due to ion, electron and photon-stimulated gas desorption. The well-known VASCO* code developed at CERN in 2004 (and then PyVASCO**) is already used to estimate vacuum stability and density profiles in steady state conditions. Nevertheless, some phenomena are not taken into account such as the ionization of residual gas by the electron clouds. Therefore, we propose an upgrade of this code by introducing electron cloud maps*** to estimate the electron density and the ionization of gas by electrons, leading to an increase of both electron- and ion-induced desorption. Results obtained with the new code (called DYVACS for DYnamic VACuum Simulation) will be compared to pressure measurements in the VPS sector**** of the LHC. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1244 EP - 1247 KW - electron KW - vacuum KW - proton KW - photon KW - experiment DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPMP007 UR - http://jacow.org/ipac2019/papers/tupmp007.pdf ER - TY - CONF AU - Kaabi, W. AU - Angal-Kalinin, D. AU - Bogacz, S.A. AU - Bousson, S. AU - Brüning, O.S. AU - Calaga, R. AU - Chaikovska, I. AU - Dassa, L. AU - Gerigk, F. AU - Hounsell, B. AU - Hutton, A. AU - Jensen, E. AU - Klein, M. AU - Levichev, E.B. AU - Longuevergne, D. AU - Marhauser, F. AU - McKenzie, J.W. AU - Militsyn, B.L. AU - Olivier, G. AU - Olry, G. AU - Pupkov, Yu.A. AU - Rimmer, R.A. AU - Stocchi, A. AU - Tennant, C. AU - Thonet, P.A. AU - Vallerand, C. AU - Welsch, C.P. AU - Williams, P.H. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - PERLE: A High Power Energy Recovery Facility J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - PERLE is a proposed high power Energy Recovery Linac, designed on multi-turn configuration, based on SRF technology, to be hosted at Orsay-France in a col-laborative effort between local laboratories: LAL and IPNO, together with an international collaboration involv-ing today: CERN, JLAB, STFC ASTeC Daresbury, Liverpool University and BINP Novosibirsk. PERLE will be a unique leading edge facility designed to push advances in accelerator technology, to provide intense and highly flexible test beams for component development. In its final configuration, PERLE provides a 500 MeV elec-tron beam using high current (20 mA) acceleration during three passes through 801.6 MHz cavities. This presenta-tion outlines the technological choices, the lattice design and the main component descriptions. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1396 EP - 1399 KW - cavity KW - linac KW - cryomodule KW - injection KW - gun DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPGW008 UR - http://jacow.org/ipac2019/papers/tupgw008.pdf ER - TY - CONF AU - D'Auria, G. AU - Aicheler, M. AU - Aksoy, A.A. AU - Alesini, D. AU - Apsimon, R. AU - Arnesano, J.M. AU - Bellaveglia, M. AU - Bernhard, A. AU - Bosco, F. AU - Buonomo, B. AU - Burt, G. AU - Calvi, M. AU - Cardelli, F. AU - Castaneda Cortes, H.M. AU - Castilla, A. AU - Clarke, J.A. AU - Croia, M. AU - Cross, A.W. AU - Dattoli, G. AU - Di Mitri, S. AU - Diomede, M. AU - Dowd, R.T. AU - Dunning, D.J. AU - Fang, W.D. AU - Faus-Golfe, A. AU - Ferrario, M. AU - Ficcadenti, L. AU - Gallo, A. AU - Gazis, E.N. AU - Gazis, N. AU - Geometrante, R. AU - Gethmann, J. AU - Giribono, A. AU - Goryashko, V.A. AU - Han, Y. AU - Jacewicz, M. AU - Janssen, X.J.A. AU - Kokole, M. AU - Latina, A. AU - Liu, X. AU - Luiten, O.J. AU - Marcos, J. AU - Marín, E. AU - Mostacci, A. AU - Mutsaers, P.H.A. AU - Muñoz Horta, R. AU - Nguyen, F. AU - Palumbo, L. AU - Petralia, A. AU - Piersanti, L. AU - Priem, J.M.A. AU - Pérez, F. AU - Rochow, R.A. AU - Rossi, C. AU - Ruber, R.J.M.Y. AU - Schmidt, T. AU - Schulte, D. AU - Spataro, B. AU - Stapnes, S. AU - Stragier, X.F.D. AU - Taylor, G. AU - Thompson, N. AU - Vaccarezza, C. AU - Wu, X.W. AU - Wuensch, W. AU - Zhang, K. AU - Zhang, L. AU - Zhu, D. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - The CompactLight Design Study Project J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The H₂020 CompactLight Project (www. CompactLight.eu) aims at designing the next generation of compact X-rays Free-Electron Lasers, relying on very high gradient accelerating structures (X-band, 12 GHz), the most advanced concepts for bright electron photo injectors, and innovative compact short-period undulators. Compared to existing facilities, the proposed facility will benefit from a lower electron beam energy, due to the enhanced undulators performance, and will be significantly more compact, with a smaller footprint,  as a consequence of the lower energy and the high-gradient X-band structures. In addition, the whole infrastructure will also have a lower electrical power demand as well as lower construction and running costs. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1756 EP - 1759 KW - FEL KW - linac KW - electron KW - undulator KW - brightness DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPRB032 UR - http://jacow.org/ipac2019/papers/tuprb032.pdf ER - TY - CONF AU - Hounsell, B. AU - Kaabi, W. AU - Klein, M. AU - Militsyn, B.L. AU - Noakes, T.C.Q. AU - Welsch, C.P. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Re-optimisation of the ALICE Gun Upgrade Design for the 500-pC Bunch Charge Requirements of PERLE J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The injector for PERLE, a planned ERL test facility, must be capable of delivering 500 pC bunches at a repetition rate of 40.1 MHz to provide a beam with 20 mA average current with a projected rms emittance of less than 6 mm mrad. This must be achieved at two different operational voltages 350 kV and 220 kV for unpolarised and polarised operation respectively. The PERLE injector will be based on an upgrade of a DC photocathode electron gun operated previously at ALICE ERL at Daresbury. The upgrade will add a load lock system for photocathode interchange. This paper presents the results of a re-optimisation of the electrode system as ALICE operated with a bunch charge of around 80 pC while PERLE needs a bunch charge of 500 pC. This re-optimisation was done using the many-objective genetic algorithm NSGAIII to minimise both the slice emittance and transverse beam size for both required operational voltages. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2071 EP - 2074 KW - cathode KW - gun KW - electron KW - operation KW - laser DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS066 UR - http://jacow.org/ipac2019/papers/tupts066.pdf ER - TY - CONF AU - Sattonnay, G. AU - Alves, M. AU - Bilgen, S. AU - Bonnis, B.J. AU - Brisset, F. AU - Gonnin, A. AU - Grasset, D. AU - Jenzer, S. AU - Letellier-Cohen, F. AU - Mercier, B. AU - Mistretta, E. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Is it Possible to Use Additive Manufacturing for Accelerator UHV Beam Pipes? J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Recently, additive manufacturing (AM) has revolutionized mechanical engineering by allowing the quick production of mechanical components with complex shapes. AM by selective laser melting (SLM) is an advanced manufacturing process which uses lasers to melt metal powders one layer at a time to produce final 3D components. This technology could be also used to make Ultra High Vacuum components. Therefore, we investigated in this work the reproducibility of AM 316L stainless steel properties for different specimen supplied by several manufacturers with the same SLM process. Clearly, the microstructure and therefore the mechanical properties of the investigated AM samples are different as a function of manufacturers: indeed, they are largely influenced by processing parameters, which produces heterogeneous and anisotropic microstructures that differ from traditional wrought counterparts. Samples were also submitted to bake cycles at high temperature, in order to check the structural stability of material properties after heat treatments. The outgassing rates and the secondary emission yield of vacuum components constructed from AM 316L were also measured. Finally, the possibility to use AM for accelerator beam pipes will be discussed. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2240 EP - 2243 KW - electron KW - vacuum KW - laser KW - ECR KW - experiment DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEXXPLS3 UR - http://jacow.org/ipac2019/papers/wexxpls3.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 - Esposito, L.S. AU - Addesa, F.M. AU - Afonin, A.G. AU - Bestman, P. AU - Borg, J.E. AU - Butcher, M.E.J. AU - Calviani, M. AU - Chesnokov, Y.A. AU - Denisov, A.S. AU - Di Castro, M. AU - Donzé, M. AU - Durum, A.A. AU - Fraser, M.A. AU - Galluccio, F. AU - Garattini, M. AU - Gavrikov, Y. AU - Gilardoni, S.S. AU - Goddard, B. AU - Hall, G. AU - Iacoangeli, F. AU - Ivanov, Yu.M. AU - James, T. AU - Kain, V. AU - Kovalenko, A.D. AU - Koznov, M.A. AU - Lendaro, J. AU - Maisheev, V.A. AU - Malyarenko, L.G. AU - Masi, A. AU - Murtas, F. AU - Natochii, A. AU - Pari, M. AU - Pesaresi, M. AU - Prieto, J. AU - Rossi, R. AU - Sandomirskiy, Yu.E. AU - Scandale, W. AU - Seidenbinder, R. AU - Serrano Galvez, P. AU - Skorobogatov, V. AU - Stoel, L.S. AU - Taratin, A.M. AU - Velotti, F.M. AU - Yanovich, A.A. AU - Zhovkovska, V. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Crystal for Slow Extraction Loss-Reduction of the SPS Electrostatic Septum J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The use of a bent crystal was investigated in order to reduce the losses at the CERN Super Proton Synchrotron (SPS) electrostatic septa (ZS) during the slow extraction of 400 GeV protons toward the North Area. The crystal, installed a few meters upstream the ZS, bends protons that would otherwise impinge on the ZS wires. Since particle deflection with good efficiency is achieved only when the crystal lattice is aligned within ~10 urad to the trajectory of the particles (at p = 400 GeV/c), a compact goniometer was built to allow the correct angular alignment of the crystal with respect to the incoming beam with a precision of few urad. In this paper, we report on the crystal features measured during a dedicated beam test by the UA9 experimental installation in the CERN H8 beam line. Details of the goniometer and its installation are also reported. The first results achieved during dedicated Machine Development (MD) sessions are finally presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2379 EP - 2382 KW - extraction KW - proton KW - experiment KW - ECR KW - alignment DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPMP028 UR - http://jacow.org/ipac2019/papers/wepmp028.pdf ER - TY - CONF AU - El Khaldi, M. AU - Alkadi, M. AU - Bruni, C. AU - Garolfi, L. AU - Gonnin, A. AU - Monard, H. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Design Study of High Gradient Compact S-band TW Accelerating Structure for the ThomX LINAC Upgrade J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - ThomX is a Compton source project in the range of the hard X rays (45/90 keV). The machine is composed of a 50/70 MeV injector Linac and a storage ring where an electron bunch collides with a laser pulse accumulated in a Fabry-Perot resonator. The final goal is to provide an X-rays average flux of 10¹²-10¹³ ph/s. A demonstrator was funded and is being built on the Orsay university campus. The S-band injector Linac consists of 2.5 cell photocathode RF gun and a TW accelerating section. During the commissioning phase, a standard LIL S-band accelerating section is able to achieve around 50 MeV corresponding to around 45 keV X-rays energy. Since the maximum targeted X-ray energy is 90 keV, the development of a new S-band accelerating section, intended to replace the LIL structure, will provide an electron beam energy of 70 MeV. This requires essentially the development of more reliable high gradient compact S band accelerating section. Such design is tailored for high gradient operation, low breakdown rates. We present here the RF design of the LINAC upgrade and the performances obtained in terms of beam dynamics. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2807 EP - 2810 KW - linac KW - HOM KW - electron KW - vacuum KW - emittance DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB008 UR - http://jacow.org/ipac2019/papers/weprb008.pdf ER - TY - CONF AU - Banon-Caballero, D. AU - Catalán Lasheras, N. AU - Faus-Golfe, A. AU - Gimeno, B. AU - Szypula, K.T. AU - Wuensch, W. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Combined Field Emission and Multipactor Simulation in High Gradient RF Accelerating Structures J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Field emitted electrons have important consequences in the operation of high-gradient RF accelerating structures both by generating so-called dark currents and initiating RF breakdown. The latter is an important limitation of the performance in such devices. Another kind of vacuum discharge that primarily affects the operation of lower-field RF components, for example those used in space applications, is multipactor. Theoretical simulations using CST Particle Studio, show that field emitted electrons generated in the high field regions of high-gradient accelerating cavities migrate to low field regions under ponderomotive forces potentially triggering multipactor there. This phenomenon is an interplay between high field and low field processes which may have as a consequence that multipactor actually affects to the performance of high-gradient cavities because field emitted electrons might reduce the timescales for the onset of multipactor. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2940 EP - 2943 KW - electron KW - multipactoring KW - simulation KW - cavity KW - GUI DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB058 UR - http://jacow.org/ipac2019/papers/weprb058.pdf ER - TY - CONF AU - Banon-Caballero, D. AU - Boronat, M. AU - Catalán Lasheras, N. AU - Faus-Golfe, A. AU - Gimeno, B. AU - Lucas, T.G. AU - Millar, W.L. AU - Paszkiewicz, J. AU - Pitman, S. AU - Sánchez Sebastián, V. AU - Vnuchenko, A. AU - Volpi, M. AU - Widorski, M. AU - Wuensch, W. AU - del Pozo Romano, V. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Dark Current Analysis at CERN’s X-band Facility J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Dark current is particularly relevant during operation in high-gradient linear accelerators. Resulting from the capture of field emitted electrons, dark current produces additional radiation that needs to be accounted for in experiments. In this paper, an analysis of dark current is presented for four accelerating structures that were tested and conditioned in CERN’s X-band test facility for CLIC. The dependence on power, and therefore on accelerating gradient, of the dark current signals is presented. The Fowler-Nordheim equation for field emission seems to be in accordance with the experimental data. Moreover, the analysis shows that the current intensity decreases as a function of time due to conditioning, but discrete jumps in the dark current signals are present, probably caused by breakdown events that change the emitters’ location and intensity. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2944 EP - 2947 KW - radiation KW - operation KW - electron KW - ECR KW - linac DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPRB059 UR - http://jacow.org/ipac2019/papers/weprb059.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 - Faus-Golfe, A. AU - Bai, B. AU - Delorme, R. AU - Dosanjh, M. AU - Duchesne, P. AU - Favaudon, V. AU - Fouillade, C. AU - Han, Y. AU - Poortmans, P.M. AU - Pouzoulet, F. AU - Prezado, Y. AU - Vallerand, C. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Optics Design and Beam Dynamics Simulation for a VHEE Radiobiology Beam Line at PRAE 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 Platform for Research and Applications with Electrons (PRAE) is a multidisciplinary R&D facility gathering subatomic physics, instrumentation, radiobiology and clinical research around a high-performance electron accelerator with beam energies up to 70 MeV. In this paper we report the complete optics design and performance evaluation of a Very High Energy Electron (VHEE) innovative radiobiology study, in particular by using Grid mini-beam and FLASH methodologies, which could represent a major breakthrough in Radiation Therapy (RT) treatment modality. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3444 EP - 3447 KW - linac KW - gun KW - radiation KW - electron KW - optics DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPMP002 UR - http://jacow.org/ipac2019/papers/thpmp002.pdf ER - TY - CONF AU - Faus-Golfe, A. AU - Bai, B. AU - Duchesne, P. AU - Han, Y. AU - Marchand, D. AU - Vallerand, C. AU - Voutier, E.J-M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - The PRORAD Beam Line Design for PRAE J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The PRAE (Platform for Research and Applications with Electrons) accelerator is being built at Orsay campus with the main objective of creating a multidisciplinary R&D platform, involving subatomic physics, instrumentation, radiobiology and clinical research around a high-performance electron accelerator with beam energies up to 70 MeV (planned 140 MeV). In this paper we will report the optics design and beam dynamics simulations for the beam line dedicated to subatomic physics, more specifically for the measurement of the proton radius. This measurement requires extremely low energy spread (5×10−4) and small beam sizes with low divergence at three beam energies: 30, 50 and 70 MeV. The beam line includes a D-type chicane coupled to a dechirping passive structure, which generates inductive wakefields in order to get the performances required for such measurement. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3448 EP - 3451 KW - electron KW - alignment KW - linac KW - gun KW - dipole DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPMP003 UR - http://jacow.org/ipac2019/papers/thpmp003.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 - Kubytskyi, V. AU - Baynar, E. AU - Bruni, C. AU - Cassou, K. AU - Chaumat, V. AU - Delerue, N. AU - Demailly, J. AU - Douillet, D. AU - Garzella, D. AU - Guilbaud, O. AU - Jenzer, S. AU - Kazamias, S. AU - Lucas, B. AU - Maynard, G. AU - Neveu, O. AU - Pittman, M. AU - Prazeres, R. AU - Purwar, H. AU - Ros, D. AU - Wang, K. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Laser-Plasma Acceleration Modeling Approach in the Case of ESCULAP Project. J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Objective of ESCULAP project is the experimental study of Laser-Plasma Acceleration (LPA) of relativistic electron bunch from photo-injector in 10 cm length plasma cell *. In parallel, numerical tools have been developed in order to optimize the setup configuration and the analysis of the expected results. The most important issue when dealing with numerical simulation over such large interaction distances is to obtain a good accuracy at a limited computing cost in order to be able to perform parametric studies. Reduction of the computational cost can be obtained either by using state-of-the-art numerical technics and/or by introducing adapted approximation in the physical model. Concerning LPA, the relevant Maxwell-Vlasov equations can be numerically solved by Particle-In-Cell (PIC) methods without any additional approximation, but can be very computationally expensive. On the other hand, the quasi-static approximation ***, which yields a drastic reduction of the computational cost, appears to be well adapted to the LPA regime. In this paper we present a detailed comparison of the performance, in terms of CPU, of LPA calculations and of the accuracies of their results obtained either with a highly optimized PIC code (FBPIC **) or with the well known quasi-static code WAKE ***. We first show that, when considering a sufficiently low charge bunch for which the beam loading effect can be neglected, the quasi-static approximation is fully validated in the LPA regime. The case of a higher bunch charge, with significant beam loading effects, has also been investigated using an enhanced version of WAKE, named WAKE-EP. Additionally, a cost evaluation, in terms of used energy per calculation, has also been done using the multi-CPU and multi-GPU versions of FBPIC. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3723 EP - 3725 KW - plasma KW - electron KW - laser KW - acceleration KW - GPU DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPGW059 UR - http://jacow.org/ipac2019/papers/thpgw059.pdf ER - TY - CONF AU - Gómez Martínez, Y. AU - Baylac, M.A. AU - Blivet, S. AU - Bondoux, D. AU - Bouly, F. AU - Dumont, P.-O. AU - Joly, C. AU - Kaabi, W. AU - Lesrel, J. AU - Saugnac, H. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - MYRRHA 80 kW CW RF Coupler Design J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - MYRRHA [1] (Multi Purpose Hybrid Reactor for High Tech Applications) is an Accelerator Driven System (ADS) project. Its superconducting linac will provide a 600 MeV - 4 mA proton beam. The first project phase based on a 100 MeV linac is launched. The Radio-Frequency (RF) couplers have been designed to handle 80 kW CW at 352.2 MHz. This paper describes the thermal, mechanical and RF studies leading to the final design of the RF coupler. PB - JACoW Publishing CP - Geneva, Switzerland SP - 4115 EP - 4117 KW - cavity KW - multipactoring KW - electron KW - vacuum KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPTS007 UR - http://jacow.org/ipac2019/papers/thpts007.pdf ER - TY - CONF AU - Delerue, N. AU - Carduner, H.C. AU - Gerard, R.L. AU - Jenzer, S. AU - Manil, P.M. AU - Repain, P.R. AU - Simar, A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Prospects of Additive Manufacturing for Accelerators J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Additive manufacturing allows the production of mechanical components often much faster than traditional manufacturing. Several accelerators components built using additive manufacturing have already been qualified for use in accelerator. A workshop was held in Orsay in December 2018 to discuss the prospects of using additive manufacturing for particle accelerators and particle detectors. We report here on the prospects as far as accelerators are concerned. PB - JACoW Publishing CP - Geneva, Switzerland SP - 4118 EP - 4120 KW - cavity KW - vacuum KW - niobium KW - detector KW - GUI DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPTS008 UR - http://jacow.org/ipac2019/papers/thpts008.pdf ER - TY - CONF AU - Delerue, N. AU - Auguste, D. AU - Bonis, J. AU - Gauthier, F. AU - Jenzer, S. AU - Moutardier, A.M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Tests of a 3D Printed BPM with a Stretched Wire and with a Particle Beam J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - We have successfully printed a beam position monitor using 3D printing. After ultra-high vacuum testing and initial measurements with a network analyser we now reports on tests of this BPM using the stretched wire method. The BPM has been installed on a test stand with a wire going through it and electrical pulses have been sent. The signal measured on the pick-ups was compared to that of two conventional BPMs and shows no anomaly specific to the 3D printed BPMs. Following the success of these tests we have also installed this BPM in a beam line at the PhotoInjector at LAL (PHIL). We show that it can give position measurements with an accuracy comparable to that of other BPMs. PB - JACoW Publishing CP - Geneva, Switzerland SP - 4368 EP - 4371 KW - vacuum KW - pick-up KW - experiment KW - electron KW - instrumentation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-FRXXPLS1 UR - http://jacow.org/ipac2019/papers/frxxpls1.pdf ER -