| Article | |
| Title | Beam coupling impedance of the main extraction kickers in the CERN PS |
| Author(s) | Neroni, M (CERN ; U. Rome La Sapienza (main)) ; Barnes, M J (CERN) ; Lasheen, A (CERN) ; Mostacci, A (U. Rome La Sapienza (main)) ; Popovic, B (Argonne) ; Vollinger, C (CERN) |
| Publication | 2024 |
| Number of pages | 12 |
| In: | JINST 19 (2024) T08001 |
| In: | 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.T08001 |
| DOI | 10.1088/1748-0221/19/08/T08001 |
| Subject category | Accelerators and Storage Rings |
| Accelerator/Facility, Experiment | CERN PS |
| Abstract | In view of the High Luminosity (HL) upgrade of the LHC, thebeam intensity must be doubled in the injector chain. To performreliable beam dynamics simulations, the beam coupling impedance inthe injectors, such as the Proton Synchrotron (PS), must be followedclosely by including all contributing elements into the impedancemodel. The existing kicker magnets of the PS had been optimized forlarge kick strength and short rise/fall times, but not necessarilyto minimise beam coupling impedance. Hence, unwanted beam inducedvoltage can build up in their electrical circuits, with an impact onthe beam. The beam coupling impedances of the two main kickermagnets used for the fast extraction from PS, the KFA71 and KFA79,are extensively characterized in this study. In particular,electromagnetic simulation results for the longitudinal andtransverse coupling impedance are shown. The critical impedancecontributions are identified, and their effect on beam stabilitywith a possible mitigation solution is discussed. Moreover, theimpact of the cable terminations on the electromagnetic fieldpattern and possible mitigation techniques are presented, providinga complete impedance evaluation of the entire kicker installation. |
| Copyright/License | CC-BY-4.0 publication: © 2024 The authors |
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記錄創建於2024-11-28，最後更新在2024-11-28
