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Title: Simulation of Multipacting with Space Charge Effect

Abstract

Here, the electron multiplication on surfaces exposed to an oscillating electromagnetic field causes the phenomenon of multipacting, which can degrade significantly the performance of vacuum RF devices, especially accelerating cavities. It is a serious obstacle to be avoided for normal operation of particle accelerator and their RF components. Many types of room temperature and superconducting accelerating cavities are designed and produced at Fermilab for different projects. The extensive simulations of multipacting in the cavities with updated material properties and comparison of the simulation results with experimental data are routinely performed during electromagnetic design of the cavities. The new advanced computing capabilities made it possible to take the space charge effect into account in the multipacting simulations. The basic new features of multipacting process that appear due to the space charge effect are shown for the classic case of the parallel plates and discussed. As the first practical application of the multipacting simulations with space charge effect the study of multipacting in the low-beta and high-beta 650 MHz elliptical superconducting cavities is also presented.

Authors:
 [1]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1399102
Report Number(s):
FERMILAB-PUB-17-399-TD
Journal ID: ISSN 2330-4286; 1629856
Grant/Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
American Journal of Physics and Applications
Additional Journal Information:
Journal Volume: 5; Journal Issue: 6; Journal ID: ISSN 2330-4286
Publisher:
Science Publishing Group
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; Multipacting; Accelerator; Cavity; Secondary Emission; Space Charge

Citation Formats

Romanov, Gennady. Simulation of Multipacting with Space Charge Effect. United States: N. p., 2017. Web. doi:10.11648/j.ajpa.20170506.15.
Romanov, Gennady. Simulation of Multipacting with Space Charge Effect. United States. doi:10.11648/j.ajpa.20170506.15.
Romanov, Gennady. Mon . "Simulation of Multipacting with Space Charge Effect". United States. doi:10.11648/j.ajpa.20170506.15. https://www.osti.gov/servlets/purl/1399102.
@article{osti_1399102,
title = {Simulation of Multipacting with Space Charge Effect},
author = {Romanov, Gennady},
abstractNote = {Here, the electron multiplication on surfaces exposed to an oscillating electromagnetic field causes the phenomenon of multipacting, which can degrade significantly the performance of vacuum RF devices, especially accelerating cavities. It is a serious obstacle to be avoided for normal operation of particle accelerator and their RF components. Many types of room temperature and superconducting accelerating cavities are designed and produced at Fermilab for different projects. The extensive simulations of multipacting in the cavities with updated material properties and comparison of the simulation results with experimental data are routinely performed during electromagnetic design of the cavities. The new advanced computing capabilities made it possible to take the space charge effect into account in the multipacting simulations. The basic new features of multipacting process that appear due to the space charge effect are shown for the classic case of the parallel plates and discussed. As the first practical application of the multipacting simulations with space charge effect the study of multipacting in the low-beta and high-beta 650 MHz elliptical superconducting cavities is also presented.},
doi = {10.11648/j.ajpa.20170506.15},
journal = {American Journal of Physics and Applications},
issn = {2330-4286},
number = 6,
volume = 5,
place = {United States},
year = {2017},
month = {11}
}

Journal Article:
Free Publicly Available Full Text
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