Electron cross-field transport in a miniaturized cylindrical Hall thruster

Artem N. Smirnov, Yevgeny Raitses, Nathaniel J. Fisch

Research output: Contribution to journalReview article

32 Scopus citations

Abstract

Conventional annular Hall thrusters become inefficient when scaled to low power. Cylindrical Hall thrusters, which have lower surface-to-volume ratio, are more promising for scaling down. They presently exhibit performance comparable with conventional annular Hall thrusters. The present paper gives a review of the experimental and numerical investigations of electron cross-field transport in the 2.6-cm miniaturized cylindrical Hall thruster (100-W power level). We show that, in order to explain the discharge current observed for the typical operating conditions, the electron anomalous collision frequency νB has to be on the order of the Bohm value, νB ≈ ωc/16. The contribution of electron-wall collisions to cross-field transport is found to be insignificant. The optimal regimes of thruster operation at low background pressure (below 10-5 torr) in the vacuum tank appear to be different from those at higher pressure (∼ 10-4 torr).

Original languageEnglish (US)
Pages (from-to)132-141
Number of pages10
JournalIEEE Transactions on Plasma Science
Volume34
Issue number2 I
DOIs
StatePublished - Apr 1 2006

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Keywords

  • Bohm diffusion
  • Electron transport
  • Hall discharge
  • Langmuir probes
  • Plasma propulsion
  • Turbulence

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