Plasma flow measurement using directional Langmuir probe under weakly ion-magnetized conditions

Kenichi Nagaoka, Atsushi Okamoto, Shinji Yoshimura, Masayoshi Y. Tanaka

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

It is both experimentally and theoretically demonstrated that ion flow velocity at an arbitrary angle with respect to the magnetic field can be measured with a directional Langmuir probe. Based on the symmetry argument, we show that the effect of magnetic field on directional probe current is exactly canceled in determining the ion flow velocity, and obtain the generalized relation between flow velocity and directional probe currents valid for any flowing direction. The absolute value of the flow velocity is determined by an in situ calibration method of the probe. The applicability limit of the present method to a strongly ion-magnetized plasma is experimentally examined.

Original languageEnglish
Pages (from-to)131-137
Number of pages7
JournalJournal of the Physical Society of Japan
Volume70
Issue number1
DOIs
Publication statusPublished - Jan 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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