Boltzmann expansion in a radiofrequency conical helicon thruster operating in xenon and argon

C. Charles, R. Boswell, K. Takahashi

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

A low pressure (∼0.5 mTorr in xenon and ∼1 mTorr in argon) Boltzmann expansion is experimentally observed on axis within a magnetized (60 to 180 G) radiofrequency (13.56 MHz) conical helicon thruster for input powers up to 900 W using plasma parameters measured with a Langmuir probe. The axial forces, respectively, resulting from the electron and magnetic field pressures are directly measured using a thrust balance for constant maximum plasma pressure and show a higher fuel efficiency for argon compared to xenon.

Original languageEnglish
Article number223510
JournalApplied Physics Letters
Volume102
Issue number22
DOIs
Publication statusPublished - 2013 Jun 3

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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