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Author Schweigert, I. V. ♦ Alexandrov, A. L. ♦ Zakrevsky, Dm. E. ♦ Bokhan, P. A.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS ♦ ATOMS ♦ BREAKDOWN ♦ COLLISIONS ♦ CURRENTS ♦ DOPPLER EFFECT ♦ ELECTRIC POTENTIAL ♦ ELECTRON EMISSION ♦ ELECTRONS ♦ HELIUM ♦ IONS ♦ PHOTONS ♦ PULSES ♦ SIMULATION
Abstract The experiments in high-voltage open discharge in helium [1, 2] showed a controlled current growth rate of 500 A/(cm{sup 2}ns) for an applied voltage of 20 kV and gas pressure of 6 Torr. A kinetic model of the subnanosecond breakdown is developed to analyze the mechanism of current growth, which takes into account the kinetics of electrons, ions, fast atoms and photons with a Doppler shift (DS). DS photons appear in discharge due to collisions of heavy particles. Using particle in cell simulations, we show a critical role of DS photons in the electron emission from the cathode during the breakdown. Our experimental and calculation results show a decrease of the breakdown time with increasing gas pressure from 3 Torr to 16 Torr.
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 2016-06-08
Publisher Place United States
Volume Number 1738
Issue Number 1


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