Trigger mechanism for the abrupt loss of energetic ions in magnetically confined plasmas

K. Ida, T. Kobayashi, M. Yoshinuma, T. Akiyama, T. Tokuzawa, H. Tsuchiya, K. Itoh, S. I. Itoh

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

Abstract

Interaction between a quasi-stable stationary MHD mode and a tongue-shaped deformation is observed in the toroidal plasma with energetic particle driven MHD bursts. The quasi-stable stationary 1/1 MHD mode with interchange parity appears near the resonant rational surface of q = 1 between MHD bursts. The tongue-shaped deformation rapidly appears at the non-resonant non-rational surface as a localized large plasma displacement and then collapses (tongue event). It curbs the stationary 1/1 MHD mode and then triggers the collapse of energetic particle and magnetic field reconnection. The rotating 1/1 MHD mode with tearing parity at the q = 1 resonant surface, namely, the MHD burst, is excited after the tongue event.

Original languageEnglish
Article number2804
JournalScientific reports
Volume8
Issue number1
DOIs
Publication statusPublished - Feb 12 2018

All Science Journal Classification (ASJC) codes

  • General

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