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/debate

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 - Dec 1 2011

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injection
current sheets
coils
current density
causes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Magnetic helicity injection mechanism for double-null startup of the UTST spherical tokamak plasmas. / Watanabe, Takenori G.; Ono, Yasushi; Yamada, Takuma; Kamio, Shuji; Cao, Qinghong; Suzuki, Naoto; Ishiguchi, Koji; Inomato, Michiaki.

In: Plasma and Fusion Research, Vol. 6, No. 2011, 1202131, 01.12.2011.

Research output: Contribution to journalComment/debate

Watanabe, TG, Ono, Y, Yamada, T, Kamio, S, Cao, Q, Suzuki, N, Ishiguchi, K & Inomato, M 2011, 'Magnetic helicity injection mechanism for double-null startup of the UTST spherical tokamak plasmas', Plasma and Fusion Research, vol. 6, no. 2011, 1202131. https://doi.org/10.1585/pfr.6.1202131
Watanabe, Takenori G. ; Ono, Yasushi ; Yamada, Takuma ; Kamio, Shuji ; Cao, Qinghong ; Suzuki, Naoto ; Ishiguchi, Koji ; Inomato, Michiaki. / Magnetic helicity injection mechanism for double-null startup of the UTST spherical tokamak plasmas. In: Plasma and Fusion Research. 2011 ; Vol. 6, No. 2011.
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AU - Yamada, Takuma

AU - Kamio, Shuji

AU - Cao, Qinghong

AU - Suzuki, Naoto

AU - Ishiguchi, Koji

AU - Inomato, Michiaki

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