Energetic electrons moving along peripheral magnetic field lines in magnetically expanding plasmas

Yuichi Igarashi, Kazunori Takahashi, Tamiya Fujiwara

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Two-dimensional structures of a floating potential of a Langmuir probe are measured in a magnetically expanding plasma using permanent magnets for two choices of the argon gas pressures of 1 and 3 mtorr, where an electric double layer (DL) forms for 1 mtorr while it disappears for 3 mtorr. The narrow region of the negative floating potential, which indicates the presence of energetic electrons, is observed to spread out along the outermost magnetic field line not intersecting the source wall for both pressures. It is found that the energetic electrons are transported from the source along the field lines, irrespective of the presence of the DL. Here, the typical structure observed for 1 mtorr is presented.

Original languageEnglish
Article number5771127
Pages (from-to)2442-2443
Number of pages2
JournalIEEE Transactions on Plasma Science
Volume39
Issue number11 PART 1
DOIs
Publication statusPublished - 2011 Nov
Externally publishedYes

Keywords

  • Expanding plasma
  • particle transport
  • permanent magnets

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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