Magnetic helicity injection mechanism for double-null startup of the UTST spherical tokamak plasmas

Takenori G. Watanabe, Yasushi Ono, Takuma Yamada, Shuji Kamio, Qinghong Cao, Naoto Suzuki, Koji Ishiguchi, Michiaki Inomato

Research output: Contribution to journalComment/debatepeer-review

Abstract

A close relationship between magnetic helicity injection and magnetic reconnection was observed during double-null formation of spherical tokamak (ST) plasmas. The magnetic reconnection of common flux into private flux causes concentration of current density along the current sheet, forming a high eigen-value area between the helicity source (coil flux) and the ST plasma. The formation of a plasmoid and its translation to core plasma indicate intermittent translation of the high eigen-value area, suggesting a mechanism for helicity injection.

Original languageEnglish
Article number1202131
JournalPlasma and Fusion Research
Volume6
Issue number2011
DOIs
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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