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Title: Transition of window breakdown from vacuum multipactor discharge to rf plasma

Abstract

In high-power microwave systems, the transition of window breakdown from single surface vacuum multipactor discharge to rf plasma with increasing gas pressure is investigated using particle-in-cell simulations. An intermediate pressure regime where multipactor discharge and rf plasma coexist was found. The pressure range where the multipactor can be maintained is summarized in the plot of the secondary electron emission yield as a function of the gas pressure. As the gas pressure increases, electron-neutral collisions prevail against secondary electron emissions and the electron energy probability function changes from the bi-Maxwellian at low pressures to Druyvesteyn at high pressures as a result of the change in electron heating and cooling processes. The discharge formation time in argon, neon, and xenon is shown for different gas pressures. Different scaling laws in the discharge formation time are presented at low and high pressures, respectively.

Authors:
;  [1]
  1. Department of Nuclear Engineering, University of California, Berkeley, California 94720-1730 (United States)
Publication Date:
OSTI Identifier:
20860468
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 13; Journal Issue: 12; Other Information: DOI: 10.1063/1.2403782; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; ARGON; ELECTRON COLLISIONS; ELECTRON EMISSION; ELECTRONS; HIGH-FREQUENCY DISCHARGES; MICROWAVE RADIATION; NEON; PLASMA; PLASMA PRESSURE; PLASMA SIMULATION; PROBABILITY; SCALING LAWS; XENON

Citation Formats

Kim, H. C., and Verboncoeur, J. P. Transition of window breakdown from vacuum multipactor discharge to rf plasma. United States: N. p., 2006. Web. doi:10.1063/1.2403782.
Kim, H. C., & Verboncoeur, J. P. Transition of window breakdown from vacuum multipactor discharge to rf plasma. United States. doi:10.1063/1.2403782.
Kim, H. C., and Verboncoeur, J. P. Fri . "Transition of window breakdown from vacuum multipactor discharge to rf plasma". United States. doi:10.1063/1.2403782.
@article{osti_20860468,
title = {Transition of window breakdown from vacuum multipactor discharge to rf plasma},
author = {Kim, H. C. and Verboncoeur, J. P.},
abstractNote = {In high-power microwave systems, the transition of window breakdown from single surface vacuum multipactor discharge to rf plasma with increasing gas pressure is investigated using particle-in-cell simulations. An intermediate pressure regime where multipactor discharge and rf plasma coexist was found. The pressure range where the multipactor can be maintained is summarized in the plot of the secondary electron emission yield as a function of the gas pressure. As the gas pressure increases, electron-neutral collisions prevail against secondary electron emissions and the electron energy probability function changes from the bi-Maxwellian at low pressures to Druyvesteyn at high pressures as a result of the change in electron heating and cooling processes. The discharge formation time in argon, neon, and xenon is shown for different gas pressures. Different scaling laws in the discharge formation time are presented at low and high pressures, respectively.},
doi = {10.1063/1.2403782},
journal = {Physics of Plasmas},
number = 12,
volume = 13,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}