Localized electron heating during magnetic reconnection in MAST

T. Yamada, H. Tanabe, T. G. Watanabe, Y. Hayashi, R. Imazawa, M. Inomoto, Y. Ono, M. Gryaznevich, R. Scannell, C. Michael

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

Significant increase in the plasma temperature above 1 keV was measured during the kilogauss magnetic field reconnection of two merging toroidal plasmas under the high-guide field and collision-less conditions. The electron temperature was observed to peak significantly at the X-point inside the current sheet, indicating Joule heating caused by the toroidal electric field along the X-line. This peaked temperature increases significantly with the guide field, in agreement with the electron mean-free path calculation. The slow electron heating in the downstream suggests energy conversion from ions to electrons through ion-electron collisions in the bulk plasma as the second electron heating mechanism in the bulk plasma. The electron density profile clearly reveals the electron density pile-up / fast shock structures in the downstream of reconnection, suggesting energy conversion from ion flow energy to ion thermal energy as well as significant ion heating by reconnection outflow.

本文言語英語
論文番号106019
ジャーナルNuclear Fusion
56
10
DOI
出版ステータス出版済み - 8 16 2016

All Science Journal Classification (ASJC) codes

  • 核物理学および高エネルギー物理学
  • 凝縮系物理学

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