Measurements of secondary electron emission effects in the Hall thruster discharge

Y. Raitses, A. Smirnov, D. Staack, N. J. Fisch

Research output: Contribution to journalArticle

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Abstract

The dependence of the maximum electron temperature on the discharge voltage is studied for two Hall thruster configurations, in which a collisionless plasma is bounded by channel walls made of materials with different secondary electron emission (SEE) properties. The linear growth of the temperature with the discharge voltage, observed in the channel with a low SEE yield, suggests that SEE is responsible for the electron temperature saturation in the thruster configuration with the channel walls having a higher SEE yield. The fact that the values of the electron temperature at saturation are rather high may indirectly support the recently predicted kinetic regime of the space charge saturation of the near-wall sheath in the thruster discharge. A correlation between the effects of the channel wall material on the electron temperature and the electron cross-field current was also observed.

Original languageEnglish (US)
Article number014502
Pages (from-to)1-4
Number of pages4
JournalPhysics of Plasmas
Volume13
Issue number1
DOIs
StatePublished - Jan 1 2006

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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