Forced magnetic reconnection in helical plasmas

Seiya Nishimura, Yoshiro Narushima, Shinichiro Toda, Masatoshi Yagi, Kimitaka Itoh, Sanae I. Itoh

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Magnetic islands excited by resonant magnetic perturbations (RMPs) in helical plasmas are investigated. A Rutherford-type equation is coupled with the time evolution equation of the radial electric field associated with the neoclassical particle diffusion due to helically rippled magnetic fields. Using the model, bifurcation between the excitation and the annihilation of non-rotating magnetic islands are newly observed, depending on the magnitude of RMPs and the anomalous plasma viscosity. It is found that the transition between these states is triggered by the change in the radial electric field profile in the vicinity of magnetic island.

Original languageEnglish
Article number040
JournalPlasma and Fusion Research
Volume5
DOIs
Publication statusPublished - 2010

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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