TY - CONF AU - Laface, E. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - On Coordinate Systems in Beam Dynamics J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Any description of the beam dynamics calculation and simulation relies on the proper choice of a coordinate system in order to minimize the computational complexity and to apply different level of approximations in the calculations. This need generates a large number of reference systems, especially to describe the longitudinal dynamics of a particle beam like(z, z′),(t,∆P/P),(z, φ), etc. In this paper we summarize the rules to change coordinates systems, which system is canonical and how the Hamiltonian of the beam transforms according to the chosen coordinate system. PB - JACoW Publishing CP - Geneva, Switzerland SP - 243 EP - 246 KW - simulation KW - GUI KW - experiment KW - acceleration KW - FEL DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPGW067 UR - http://jacow.org/ipac2019/papers/mopgw067.pdf ER - TY - CONF AU - Plostinar, D.C. AU - Eshraqi, M. AU - Gålnander, B. AU - Lebedev, V.A. AU - Prior, C.R. AU - Sato, Y. AU - Tang, J.Y. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Future High Power Proton Drivers for Neutrino Beams J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Over the last two decades, significant efforts were made through several international studies to identify and develop technical solutions for potential Neutrino Factories and Superbeam Facilities. With many questions now settled, as well as clearer R&D needs, various proposals are being made for future facilities in China, Europe, Japan and North America. These include both developing and adapting existing machines as well as green-field solutions. In this paper, we review all the major accelerator programmes aimed at delivering high-power proton beams for neutrino physics. PB - JACoW Publishing CP - Geneva, Switzerland SP - 662 EP - 665 KW - linac KW - proton KW - operation KW - neutron KW - factory DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPRB045 UR - http://jacow.org/ipac2019/papers/moprb045.pdf ER - TY - CONF AU - Zou, Y. AU - Bouquerel, E. AU - Dracos, M. AU - Ekelöf, T.J.C. AU - Eshraqi, M. AU - Gålnander, B. AU - Olvegård, M. AU - Ruber, R.J.M.Y. AU - Schönauer, H.O. AU - Wildner, E.H.M. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status of the ESSnuSB Accumulator Design J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The 2.0 GeV, 5 MW proton linac for the European Spallation Source, ESS, will have the capacity to accelerate additional pulses and send them to a neutrino target, providing an excellent opportunity to produce an unprecedented high performance neutrino beam, the ESS neutrino Super Beam, ESSnuSB, to measure, with precision, the CP violating phase at the 2nd oscillation maximum. In order to comply with the acceptance of the target and horn systems that will form the neutrino super beam, the long pulses from the linac must be compressed by about three orders of magnitude with minimal particle loss, something that will be achieved through multi-turn charge-exchange injection in an accumulator ring. This ring will accommodate over 2·10¹⁴ protons, which means that several design challenges are encountered. Strong space charge forces, low-loss injection with phase space painting, efficient collimation, a reliable charge stripping system, and e-p instabilities are some of the important aspects central to the design work. This paper presents the status of the accumulator ring design, with multi-particle simulations of the injections procedure. PB - JACoW Publishing CP - Geneva, Switzerland SP - 666 EP - 668 KW - linac KW - space-charge KW - injection KW - simulation KW - target DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPRB046 UR - http://jacow.org/ipac2019/papers/moprb046.pdf ER - TY - CONF AU - Qin, Y.S. AU - Eshraqi, M. AU - Levinsen, Y. AU - Miyamoto, R. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Design of the Transferline to the ESS Target and Beam Dump at Reduced Beam Energy 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 Spallation Source (ESS) linac transfer-lines to the target and beam dump are designed for the 2 GeV beam energy. The commissioning and operation of the accelerator will start at a reduced energy of 571 MeV with the high beta part of the linac unpowered. The beam power at this energy is still above 1 MW and a proper transport from the last accelerating cavity to the target is essential. Beam dynamics design of the High Energy Beam Transport (HEBT) and Accelerator to Target (A2T) are studied based on this reduced energy in this paper, including phase advance optimization and rematch. Among the factors which are analyzed are the envelope and beam size on the target which are kept close to their values at 2 GeV and losses along the linac and the transfer lines. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1034 EP - 1037 KW - target KW - linac KW - quadrupole KW - ECR KW - ion-source DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS081 UR - http://jacow.org/ipac2019/papers/mopts081.pdf ER - TY - CONF AU - Gålnander, B. AU - Collins, M. AU - Eshraqi, M. AU - Farricker, A. AU - Martins, C.A. AU - Miyamoto, R. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status of ESS Linac Upgrade Studies for ESSnuSB 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 Spallation Source (ESS), currently under construction in Lund, Sweden, is the world’s most powerful neutron spallation source, with an average power of 5 MW at 2.0 GeV. In the ESS neutrino Super Beam Project (ESSnuSB) it is proposed to utilise this powerful accelerator as a proton driver for a neutrino beam that will be sent to a large underground Cherenkov detector in Garpenberg, mid-Sweden. In this paper we discuss the required modifications of the ESS linac to reach an additional 5 MW beam power for neutrino production in parallel to the spallation neutron production. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1038 EP - 1041 KW - linac KW - ion-source KW - proton KW - extraction KW - neutron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS082 UR - http://jacow.org/ipac2019/papers/mopts082.pdf ER - TY - CONF AU - Nilsson, E. AU - Eshraqi, M. AU - Esteban Müller, J.F. AU - Levinsen, Y. AU - Milas, N. AU - Miyamoto, R. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Beam Dynamics Simulation with an Updated Model for the ESS Ion Source and Low Energy Beam Transport J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Beam dynamics simulation of the ion source (IS) and low energy beam transport (LEBT) of the European Spallation Source (ESS) Linac is conducted with TraceWin and IBSimu code. TraceWin allows multi-particle tracking based on a particle-in-cell space-charge solver and is the standard simulation tool of the whole ESS Linac. IBSimu is based on a Vlasov solver and allows to simulate beam extraction from plasma as well as the beam transport in the LEBT. In preparation for beam commissioning of the IS and LEBT in the ESS Linac tunnel, which started in September 2018 and is ongoing as of the timing of writing this paper, the simulation models of the IS and LEBT in these two codes were updated. This paper reports the effort for these updates, including the beam distribution out of the IS, electromagnetic field map of the LEBT solenoid, more realistic aperture structure in the LEBT, as well as updated LEBT solenoids scan simulation. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1042 EP - 1045 KW - LEBT KW - rfq KW - solenoid KW - emittance KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS083 UR - http://jacow.org/ipac2019/papers/mopts083.pdf ER - TY - CONF AU - Miyamoto, R. AU - Derrez, C.S. AU - Laface, E. AU - Levinsen, Y. AU - Milas, N. AU - Sosa, A.G. AU - Tarkeshian, R. AU - Thomas, C.A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - ESS Low Energy Beam Transport Tuning During the First Beam Commissioning Stage J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - Beam commissioning of the ion source (IS) and low energy beam transport (LEBT) of the European Spallation Source is ongoing on its site as of writing this paper and continues until June 2019. The LEBT consists of two solenoids with integrated dipole correctors to steer, focus, and match the high current divergent beam out of the IS to the following radio frequency quadrupole (RFQ). It is also equipped with a suite of diagnostics devices to provide a full characterization of the beam for achieving a good transport within the LEBT, optimizing the matching to the RFQ, and also providing references to numerical simulations. This paper presents results of beam characterization campaign from the ongoing beam commissioning period, including the matching at the RFQ interface based on emittance sampling for varied strengths of the solenoids and verification of the linear model for the trajectory and beam envelope. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1046 EP - 1049 KW - solenoid KW - LEBT KW - MMI KW - emittance KW - rfq DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS084 UR - http://jacow.org/ipac2019/papers/mopts084.pdf ER - TY - CONF AU - Miyamoto, R. AU - Bebb, R.E. AU - Bergman, E.C. AU - Bergstrom, I. AU - Bertrand, B. AU - Celona, L. AU - Danared, H. AU - Derrez, C.S. AU - Donegani, E.M. AU - Eshraqi, M. AU - Esteban Müller, J.F. AU - Fay, T. AU - Grishin, V. AU - Gålnander, B. AU - Haghtalab, S. AU - Hassanzadegan, H. AU - Jansson, A. AU - Kocevar, H. AU - Laface, E. AU - Levinsen, Y. AU - Mansouri, M. AU - Martins, C.A. AU - Martins, J.P.S. AU - Milas, N. AU - Muñoz, M. AU - Neri, L. AU - Nilsson, E. AU - Plostinar, D.C. AU - Rosati, C. AU - Shea, T.J. AU - Sosa, A.G. AU - Tarkeshian, R. AU - Tchelidze, L. AU - Thomas, C.A. AU - van Velze, P.L. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - First Results of Beam Commissioning on the ESS Site for the Ion Source and Low Energy Beam Transport 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 Spallation Source (ESS), currently under construction in Lund, Sweden, will be a spallation neutron source driven by a proton linac of an unprecedented 5 MW beam power. Such a high power requires its ion source (IS) to produce proton beam pulses at 14 Hz with a high peak current more than 62.5 mA and a long plateau up to §I{3}{ms}. The IS and the following low energy beam transport (LEBT) section were manufactured and tested with beam to meet ESS requirements at INFN-LNS and delivered to ESS towards the end of 2017. Beam commissioning of these two sections on the ESS site has started in September 2018 and will continue until the end of June 2019. This paper provides an overview on this first beam commissioning period at ESS and also presents results of IS characterization and testing on LEBT functionalities. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1118 EP - 1121 KW - LEBT KW - MMI KW - solenoid KW - site KW - ion-source DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-MOPTS103 UR - http://jacow.org/ipac2019/papers/mopts103.pdf ER - TY - CONF AU - White, G.R. AU - Cobb, T.M. AU - Dalesio, L.R. AU - Davidsaver, M.A. AU - Hartman, S.M. AU - Hickin, D.G. AU - Johnson, A.N. AU - Junkes, H. AU - Kasemir, K.-U. AU - Konrad, M.G. AU - Korhonen, T. AU - Kraimer, M.R. AU - Lange, R. AU - Pearson, M.R. AU - Rivers, M.L. AU - Sekoranja, M. AU - Shankar, M.V. AU - Shen, G. AU - Shroff, K. AU - Veseli, S. AU - Vodopivec, K. AU - Zimoch, D. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - The EPICS Software Framework Moves from Controls to Physics J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Experimental Physics and Industrial Control System (EPICS), is an open-source software framework for high-performance distributed control, and is at the heart of many of the world’s large accelerators and telescopes. Recently, EPICS has undergone a major revision, with the aim of better computing supporting for the next generation of machines and analytical tools. Many new data types, such as matrices, tables, images, and statistical descriptions, plus users’ own data types, now supplement the simple scalar and waveform types of the former EPICS. New computational architectures for scientific computing have been added for high-performance data processing services and pipelining. Python and Java bindings have enabled powerful new user interfaces. The result has been that controls are now being integrated with modelling and simulation, machine learning, enterprise databases, and experiment DAQs. We introduce this new EPICS (version 7) from the perspective of accelerator physics and review early adoption cases in accelerators around the world. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1216 EP - 1218 KW - EPICS KW - controls KW - detector KW - database KW - experiment DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUZZPLM3 UR - http://jacow.org/ipac2019/papers/tuzzplm3.pdf ER - TY - CONF AU - Visintini, R. AU - Cautero, M. AU - Gucin, T.N. AU - Martins, C.A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Power Converters for the ESS Warm Magnets: Procurement Status 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 frame of the Italian In-Kind collaboration for the construction of the European Spallation Source (ESS), Elettra Sincrotrone Trieste research center is in charge, among all, of the provision of the power converters for the warm magnets of the superconducting part of the linear accelerator and of the proton beam transport line. The procurement process is running for all types of power converters. The first components have been delivered to ESS already in March 2018, while the Dipole and Quadrupole power converters are under construction. The first batches have been factory tested and shipped to Lund. The corrector power converters have been manufactured and are currently tested and calibrated at Elettra before their delivery to ESS. PB - JACoW Publishing CP - Geneva, Switzerland SP - 1251 EP - 1254 KW - linac KW - dipole KW - status KW - quadrupole KW - neutron DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPMP012 UR - http://jacow.org/ipac2019/papers/tupmp012.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 - Bosland, P. AU - Arcambal, C. AU - Ardellier, F. AU - Berry, S. AU - Bouygues, A. AU - Cenni, E. AU - Darve, C. AU - Devanz, G. AU - Hamelin, T. AU - Hanus, X. AU - Michelato, P. AU - Olivier, G. AU - Piquet, O. AU - Poupeau, J.P. AU - Renard, B. AU - Sahuquet, P. AU - Thermeau, J.P. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Tests at High RF Power of the ESS Medium Beta Cryomodule Demonstrator J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - CEA is in charge of the 30 elliptical medium and high-beta cryomodules to be installed in the ESS tunnel in Lund, Sweden. Before launching the assembly of the series cryomodules, CEA developed a medium-beta cryomodule technology demonstrator in a collaboration with IPNO, LASA and ESS. This paper briefly presents the cryomodule assembly and summarizes the main results of the high RF power tests performed in 2018 in a dedicated test stand in CEA Saclay. The main ESS requirements were reached: E_{acc} = 16.7 MV/m in cavities, Pforward = 1.1 MW in power couplers, RF pulses length = 3.6 ms at 14 Hz. The piezo tuners efficiently compensated the Lorentz forces detuning and could stabilize the accelerating field better than 1% over the full length of the expected ESS 2.86 ms beam pulse without any LLRF regulation system. Following this successful validation CEA started the assembly of the first ESS medium-beta series cryomodule PB - JACoW Publishing CP - Geneva, Switzerland SP - 1940 EP - 1943 KW - cavity KW - cryomodule KW - cryogenics KW - linac KW - status DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS006 UR - http://jacow.org/ipac2019/papers/tupts006.pdf ER - TY - CONF AU - Bertucci, M. AU - Bignami, A. AU - Bosotti, A. AU - Chiodini, M. AU - D'Ambros, A. AU - Michelato, P. AU - Monaco, L. AU - Pagani, C. AU - Paparella, R. AU - Rizzetto, D. AU - Rizzi, M. AU - Sagliano, L. AU - Sertore, D. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - LASA Activities on Surface Treatment of Low-beta Elliptical Cavities J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - This paper describes the efforts made by LASA on the development of surface treatments for low-beta elliptical cavities, for the current series production of ESS and the foreseen series production of PIP-II. The traditional techniques of buffered chemical polishing and electropolishing are here discussed taking into account the industrial environment, the practical issues due to the size and geometry of such cavities and according to the required qualification values for quality factor and accelerating gradient. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2207 EP - 2210 KW - cavity KW - SRF KW - FEL KW - cathode KW - superconductivity DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS118 UR - http://jacow.org/ipac2019/papers/tupts118.pdf ER - TY - CONF AU - Michelato, P. AU - Aurnia, S. AU - Bertucci, M. AU - Bignami, A. AU - Bosotti, A. AU - Chiodini, M. AU - D'Ambros, A. AU - Leonardi, O. AU - Miraglia, A. AU - Monaco, L. AU - Pagani, C. AU - Paparella, R. AU - Sagliano, L. AU - Sertore, D. AU - Vecchio, G. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status of the ESS Medium Beta Cavities at INFN - LASA J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - INFN-LASA contributes in-kind to the European Spallation Source ERIC with 36 6-cell cavities for the Medium Beta section of the Superconducting Linac. After having developed the electromagnetic and mechanical models, few prototypes have been produced and tested. Based on this experience, we are now supervisioning the cavity production at the industry, the resonators test at DESY and the delivery to CEA at Saclay. In this paper, we report on the status of the overall INFN-LASA contribution including also document handling, interface data exchange and QA/QC. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2211 EP - 2214 KW - cavity KW - status KW - controls KW - HOM KW - niobium DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS119 UR - http://jacow.org/ipac2019/papers/tupts119.pdf ER - TY - CONF AU - Paparella, R. AU - Bertucci, M. AU - Bignami, A. AU - Bosotti, A. AU - Chen, J.F. AU - Chiodini, M. AU - D'Ambros, A. AU - Michelato, P. AU - Monaco, L. AU - Pagani, C. AU - Sagliano, L. AU - Sertore, D. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Status of the PIP-II Activities at INFN-LASA J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - INFN-LASA joined the international effort for the PIP-II project in Fermilab and it is expected to build the 650 MHz superconducting cavities required by the low-beta section of the 800 MeV front-end proton linac, as recently signed by US DOE and Italian MIUR. After developing the electro-magnetic and mechanical design, INFN-Milano started the prototyping phase by producing five single-cells and two complete 5-cells cavities. In a joint effort with Fermilab the road for the optimal surface treatment for such low-beta resonators has started in order to approach the existing state-of-the-art performances of beta 1 cavities. This paper reports the status of PIP-II activities at INFN-LASA summarizing manufacturing experience and preliminary experimental results. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2215 EP - 2218 KW - cavity KW - niobium KW - linac KW - interface KW - SRF DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-TUPTS120 UR - http://jacow.org/ipac2019/papers/tupts120.pdf ER - TY - CONF AU - Laface, E. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - First Beam Transmission Measurements in Ion Source and LEBT at the European Spallation Source J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Ion Source and the Low Energy Beam Transport (LEBT) have been installed in the European Spallation Source tunnel, in Lund, Sweden, during the summer 2018. The first proton beam was extracted on September. In this paper we present the first set of measurements of protons transmission in combination with the analysis of the species (H⁺, H⁺₂, H⁺₃) extracted by the source. We show that our measurements are compatible with a fraction of 80\% of protons transported along the LEBT, as measured at the INFN-LNS, Catania, Italy during the commissioning in 2016-17. [1] PB - JACoW Publishing CP - Geneva, Switzerland SP - 2353 EP - 2355 KW - LEBT KW - ion-source KW - proton KW - solenoid KW - MMI DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPMP020 UR - http://jacow.org/ipac2019/papers/wepmp020.pdf ER - TY - CONF AU - Derrez, C.S. AU - Baron, R.A. AU - Bebb, R.E. AU - Bergman, E.C. AU - Dolenc Kittelmann, I. AU - Donegani, E.M. AU - Fay, T. AU - Grandsaert, T.J. AU - Grishin, V. AU - Haghtalab, S. AU - Hassanzadegan, H. AU - Jansson, A. AU - Kocevar, H. AU - Laface, E. AU - Midttun, Ø. AU - Miyamoto, R. AU - Norin, J. AU - Rosengren, K.E. AU - Shea, T.J. AU - Sosa, A.G. AU - Tarkeshian, R. AU - Tchelidze, L. AU - Thomas, C.A. AU - van Velze, P.L. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Initial Performance of the Beam Instrumentation for the ESS IS & LEBT 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 Spallation Source (ESS) is currently under construction in Lund (Sweden), and its 5 MW of average beam power at repetition rate of 14 Hz will make it five times more powerful than other pulsed neutron-scattering facilities. High-energy neutrons will be produced via spallation by 2 GeV protons on a tungsten target. A complete suite of beam diagnostics will enable tuning, monitoring and protection of the proton accelerator during commissioning, studies and operation. As an initial step toward neutron production, the Ion Source (ISrc) and the 75keV Low Energy Beam Transport Line (LEBT) have been installed. For the commissioning and characterization of this first beam-producing system, a subset of the ISrc and LEBT diagnostics suite has been deployed. This includes the following equipment: a Faraday cup, beam current transformers, an Allison Scanner emittance measurement unit, beam-induced fluorescence monitors, and a Doppler-shift spectroscopy system. Beam instrumentation deployment and performance verification, as well as the operational experience during the initial beam commissioning, will be presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 2650 EP - 2653 KW - LEBT KW - MMI KW - emittance KW - ion-source KW - diagnostics DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPGW076 UR - http://jacow.org/ipac2019/papers/wepgw076.pdf ER - TY - CONF AU - Bolling, B.E. AU - Milas, N. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - DC Beam Space-Charge Modeling for OpenXAL J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - OpenXAL is an open source multi-purpose accelerator physics software platform based on a pure Java open source development environment used for creating accelerator physics applications, scripts and services. Currently, the software has been used with an ellipsoidal (bunched) beam to account for space-charge effects. Applications developed so far for ESS, such as the Virtual Machine for the ESS Low Energy Beam Transport (LEBT) section, would profit from a DC beam description. In this paper, the space-charge component for a continuous beam is derived taking into account beams with different transverse charge distributions (uniform, gaussian, etc). The implementation in OpenXAL and a comparison with other simulation codes is also presented. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3177 EP - 3180 KW - simulation KW - space-charge KW - LEBT KW - solenoid KW - GUI DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPTS037 UR - http://jacow.org/ipac2019/papers/wepts037.pdf ER - TY - CONF AU - Esteban Müller, J.F. AU - Laface, E. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - New RFQ and Field Map Model for the ESS Linac Simulator J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Java ESS Linac Simulator (JELS) is an extension of the Open XAL online model that is a fundamental part of the accelerator control system. The model is used by high-level physics applications for commissioning, tuning, and machine development activities at the European Spallation Source (ESS). This paper summarizes the upgrades done to JELS during the last year. An RFQ model is under development. The RFQ was the only element of the linac missing in the online model. The electromagnetic field map model has been refactored to ease implementation of new elements (rf cavities and magnets), and to allow the superposition of more than one field map and other elements. Further improvements have also been done in the treatment of corrector magnets and space charge for continuous beam in the Low-Energy Beam Transport (LEBT). Finally, the machine description can now include arbitrary aperture definitions. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3181 EP - 3183 KW - rfq KW - linac KW - space-charge KW - cavity KW - simulation DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPTS038 UR - http://jacow.org/ipac2019/papers/wepts038.pdf ER - TY - CONF AU - Zhukov, A.P. AU - Allen, C.K. AU - Bolling, B.E. AU - Chu, C.P. AU - Dodson, T. AU - Esteban Müller, J.F. AU - Gillette, P. AU - Laface, E. AU - Laurent, P. AU - Levinsen, Y. AU - Li, M.T. AU - Li, Y. AU - Lu, X.H. AU - Milas, N. AU - Normand, G. AU - Peng, J. AU - Rosati, C. AU - Savalle, A. AU - Shishlo, A.P. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Open XAL Status Report 2019 J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The Open XAL accelerator physics software platform is being developed through an international collaboration among several facilities since 2010. This paper discusses progress in beam dynamics simulation, new RF models, and updated application framework along with new generic accelerator physics applications. We present the current status of the project, a roadmap for continued development and an overview of the project status at each participating facility. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3341 EP - 3344 KW - cavity KW - LEBT KW - linac KW - framework KW - status DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPTS096 UR - http://jacow.org/ipac2019/papers/wepts096.pdf ER - TY - CONF AU - Ibison, M.G. AU - Adli, E. AU - Christoforo, G. AU - Gjersdal, H. AU - Shea, T.J. AU - Thomas, C.A. AU - Welsch, C.P. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Designing the European Spallation Source Tuning Dump Beam Imaging System J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - The first section of the European Spallation Source (ESS) to receive high-energy protons when live operation begins will be the Tuning Dump beam-line. The dump line will be used during accelerator commissioning to tune the linac, and must accept the full range of ESS energies up to 2 GeV, from 5µs probe pulse to full 2.86ms pulse length, and beam sizes up to the 250 mm limit of the physical aperture, although the allowed pulse rate will be restricted by the thermal capacity of the dump. An imaging system has been developed to view remotely the transverse beam profile in the section immediately before the dump entrance, using insertable scintillator screens. This contribution presents the principal design parameters for this system, with particular reference to the techniques used in assessing the radiation and thermal environments and their impact on the selection of locations for the imaging cameras, and the specification of the mechanical screen actuators. The predicted optical performance of the system is also summarised. PB - JACoW Publishing CP - Geneva, Switzerland SP - 3374 EP - 3377 KW - proton KW - radiation KW - target KW - linac KW - optics DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-WEPTS107 UR - http://jacow.org/ipac2019/papers/wepts107.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 - Pasotti, C. AU - Cautero, M. AU - Gucin, T.N. AU - Martins, C.A. AU - Yogi, R.A. ED - Boland, Mark ED - Tanaka, Hitoshi ED - Button, David ED - Dowd, Rohan ED - Schaa, Volker RW ED - Tan, Eugene TI - Radio Frequency Power Stations for ESS LINAC Spoke Section J2 - Proc. of IPAC2019, Melbourne, Australia, 19-24 May 2019 CY - Melbourne, Australia T2 - International Particle Accelerator Conference T3 - 10 LA - english AB - 26 equivalent 400 kW Radio Frequency Power Station (RFPS) units will be provided by Elettra as part of the Italian in kind contribution to ESS. They will be installed in the LINAC "Spoke Section". Each RFPS will power a single superconducting spoke cavity in pulsed operation at 352.21 MHz. The RFPS is a complete system that operates unmanned, based on a combination of solid state and tetrode amplification’s stages. The tender specification, the RFPS main features and requested performances are reported here. PB - JACoW Publishing CP - Geneva, Switzerland SP - 4346 EP - 4348 KW - operation KW - controls KW - power-supply KW - cavity KW - site DA - 2019/06 PY - 2019 SN - 978-3-95450-208-0 DO - DOI: 10.18429/JACoW-IPAC2019-THPTS102 UR - http://jacow.org/ipac2019/papers/thpts102.pdf ER -