Low-frequency magnetic fluctuation measurement during magnetic reconnection in counter-helicity plasma merging experiment

Akihiro Kuwahata, Hiroshi Tanabe, Shingo Ito, Michiaki Inomoto, Yasushi Ono

Research output: Contribution to journalArticlepeer-review

Abstract

Magnetic fluctuations at a frequency lower than the local ion cyclotron frequency have been observed in association with magnetic reconnection events in a TS-3 plasma merging device. Counter-helicity merging of spheromaks provides significant ion heating by magnetic reconnection to form a high-β field-reversed configuration plasma. The magnitude of the fluctuation observed during and after the counter-helicity merging has a stronger dependence on the ion mass than on the reconnection speed, indicating that fast ion outflow from the X point would bring about excitation of large-amplitude low-frequency magnetic fluctuations, which may be responsible for direct ion heating.

Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalElectrical Engineering in Japan (English translation of Denki Gakkai Ronbunshi)
Volume187
Issue number2
DOIs
Publication statusPublished - 2014 Apr
Externally publishedYes

Keywords

  • Alfvén wave
  • heating
  • magnetic fluctuation
  • magnetic reconnection
  • MHD (magneto-hydro-dynamics) waves
  • plasma merging

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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