Space charge wave packets generated by cathode-directed ionization waves in discharge tubes

M. Mond, I. Rutkevich, Y. Kaufman, P. Choi, M. Favre

Research output: Contribution to conferenceAbstractpeer-review

Abstract

A quasi-one-dimensional theory of propagation of ionization waves (IW) stimulated by runaway electron beams accelerated in a low-pressure gas is developed. Such waves determine the virtual anode propagation during the prebreakdown stage of a transient hollow cathode discharge as well as a fast capillary discharge for which the discharge tube is surrounded by a shield that has the cathode potential. It is shown that a wave packet (WP) of plasma oscillations underlies the structure of the IWs. The frequency of the oscillations increases from the leading edge of the IW to its trailing edge due to the continuous ionization. Such a structure of the WPs differs from the classical nonlinear solitary waves that are filled with Langmuir oscillations. A parametric study of the main characteristics of the IWs and the space charge WPs for various values of the initial gas pressure, tube radius, and applied voltage is carried out.
Original languageEnglish GB
StatePublished - 1 Nov 1999
Externally publishedYes
Event American Physical Society, 41st Annual Meeting of the Division of Plasma Physics, - Seattle, WA, United States
Duration: 15 Nov 199919 Nov 1999

Conference

Conference American Physical Society, 41st Annual Meeting of the Division of Plasma Physics,
Country/TerritoryUnited States
CitySeattle, WA,
Period15/11/9919/11/99

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