Cross-field plasma lens for focusing of the Hall thruster plume

Martin E. Griswold, Yevgeny Raitses, Nathaniel J. Fisch

Research output: Contribution to journalArticlepeer-review

13 Scopus citations


Hall thrusters produce neutralized ion beams with high current density because the acceleration takes place in quasi-neutral plasma and is not subject to space charge limitation. We tested an external plasma lens (PL) in front of the thruster as a means to focus the thruster plume. In the PL, the plasma is nearly collisionless, with non-magnetized flowing ions and magnetized electrons. Surprisingly, we observed anomalous electron cross-field transport, leading to large currents to the PL electrode and enhanced power loss.

Original languageEnglish (US)
Article number044005
JournalPlasma Sources Science and Technology
Issue number4
StatePublished - Aug 1 2014

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


  • Hall thruster
  • anomalous transport
  • plasma lens


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