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Title: Simulation of beam-induced plasma in gas-filled rf cavities

Processes occurring in a radio-frequency (rf) cavity, filled with high pressure gas and interacting with proton beams, have been studied via advanced numerical simulations. Simulations support the experimental program on the hydrogen gas-filled rf cavity in the Mucool Test Area (MTA) at Fermilab, and broader research on the design of muon cooling devices. space, a 3D electromagnetic particle-in-cell (EM-PIC) code with atomic physics support, was used in simulation studies. Plasma dynamics in the rf cavity, including the process of neutral gas ionization by proton beams, plasma loading of the rf cavity, and atomic processes in plasma such as electron-ion and ion-ion recombination and electron attachment to dopant molecules, have been studied. Here, through comparison with experiments in the MTA, simulations quantified several uncertain values of plasma properties such as effective recombination rates and the attachment time of electrons to dopant molecules. Simulations have achieved very good agreement with experiments on plasma loading and related processes. Lastly, the experimentally validated code space is capable of predictive simulations of muon cooling devices.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. Brookhaven National Lab. (BNL), Upton, NY (United States). Computational Science Initiative
  2. Stony Brook Univ., NY (United States). Dept. of Applied Mathematics and Statistics; Brookhaven National Lab. (BNL), Upton, NY (United States). Computational Science Center
  3. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  4. Illinois Inst. of Technology, Chicago, IL (United States)
Publication Date:
Report Number(s):
BNL-113918-2017-JA; FERMILAB-PUB-17-321-AD
Journal ID: ISSN 2469-9888; PRABCJ; TRN: US1702637
Grant/Contract Number:
SC0012704; AC02-07CH11359
Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Volume: 20; Journal Issue: 3; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Advanced Scientific Computing Research (SC-21); USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 43 PARTICLE ACCELERATORS
OSTI Identifier:
1346087
Alternate Identifier(s):
OSTI ID: 1362161; OSTI ID: 1375038

Yu, Kwangmin, Samulyak, Roman, Yonehara, Katsuya, and Freemire, Ben. Simulation of beam-induced plasma in gas-filled rf cavities. United States: N. p., Web. doi:10.1103/PhysRevAccelBeams.20.032002.
Yu, Kwangmin, Samulyak, Roman, Yonehara, Katsuya, & Freemire, Ben. Simulation of beam-induced plasma in gas-filled rf cavities. United States. doi:10.1103/PhysRevAccelBeams.20.032002.
Yu, Kwangmin, Samulyak, Roman, Yonehara, Katsuya, and Freemire, Ben. 2017. "Simulation of beam-induced plasma in gas-filled rf cavities". United States. doi:10.1103/PhysRevAccelBeams.20.032002.
@article{osti_1346087,
title = {Simulation of beam-induced plasma in gas-filled rf cavities},
author = {Yu, Kwangmin and Samulyak, Roman and Yonehara, Katsuya and Freemire, Ben},
abstractNote = {Processes occurring in a radio-frequency (rf) cavity, filled with high pressure gas and interacting with proton beams, have been studied via advanced numerical simulations. Simulations support the experimental program on the hydrogen gas-filled rf cavity in the Mucool Test Area (MTA) at Fermilab, and broader research on the design of muon cooling devices. space, a 3D electromagnetic particle-in-cell (EM-PIC) code with atomic physics support, was used in simulation studies. Plasma dynamics in the rf cavity, including the process of neutral gas ionization by proton beams, plasma loading of the rf cavity, and atomic processes in plasma such as electron-ion and ion-ion recombination and electron attachment to dopant molecules, have been studied. Here, through comparison with experiments in the MTA, simulations quantified several uncertain values of plasma properties such as effective recombination rates and the attachment time of electrons to dopant molecules. Simulations have achieved very good agreement with experiments on plasma loading and related processes. Lastly, the experimentally validated code space is capable of predictive simulations of muon cooling devices.},
doi = {10.1103/PhysRevAccelBeams.20.032002},
journal = {Physical Review Accelerators and Beams},
number = 3,
volume = 20,
place = {United States},
year = {2017},
month = {3}
}