High-density plasma production in converging field following a magnetic beach plasma source

Atsushi Okamoto, Ryosuke Ochiai, Katsuya Satou, Hiroki Hachikubo, Minami Sugimoto, Takaaki Fujita, Hiroyuki Takahashi

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


A high ion saturation current (Iis) phase, which is characterized by larger increase/decrease of Iis compared with the magnetic field variation, is observed in a converging field following an electron cyclotron resonance plasma source with a magnetic beach configuration. Plasma production rate and particle influx are considered in terms of orbits of collisionless electrons. While the ionization probability of one-pass electron is order of 0.1, the mirror trapped electron cause ionization within several or dozen bouncing. This is an essence of improved ionization rate resulting in the high Iis phase. The temporal evolution of ion saturation current observed in the experiment is well explained by the estimated plasma production rate and particle influx.

Original languageEnglish
Article number2401005
JournalPlasma and Fusion Research
Issue numberSpecialissue1
Publication statusPublished - 2019


  • Bounce motion
  • Converging magnetic field
  • Electron cyclotron resonance
  • High-density plasma
  • Magnetic beach configuration
  • Pitch angle

ASJC Scopus subject areas

  • Condensed Matter Physics


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