Determining the Closed Flux Surface in a Helical Plasma in TOKASTAR-2 with an Electrostatic Probe

Hiromasa ITOU; Takaaki FUJITA; Hideki ARIMOTO; Atsushi OKAMOTO; Kenji MURAOKA; Ryoichi SUGIOKA; Kohei YASUDA; Ryoma YOKOYAMA; Masato MINOURA; Takahiro YAMAUCHI

doi:10.1585/pfr.13.1402039

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Determining the Closed Flux Surface in a Helical Plasma in TOKASTAR-2 with an Electrostatic Probe

Hiromasa ITOU, Takaaki FUJITA, Hideki ARIMOTO, Atsushi OKAMOTO, Kenji MURAOKA, Ryoichi SUGIOKA, Kohei YASUDA, Ryoma YOKOYAMA, Masato MINOURA, Takahiro YAMAUCHI

著者情報

キーワード: TOKASTAR, stellarator, flux surface, field-line tracing, electron orbit, triple-probe measurement

ジャーナルフリー

2018 年 13 巻 p. 1402039

DOI https://doi.org/10.1585/pfr.13.1402039

詳細

抄録

The electron temperature and density were measured with an electrostatic probe in a helical plasma in the TOKASTAR-2 device in order to determine the location and the shape of the last closed flux surface (LCFS). The electron density inside the calculated LCFS was found to be higher in a helical plasma than in a plasma without a helical field when the electron-cyclotron-resonance layer was located inside the LCFS. Although errors in the manufacturing and installation of coils have been a concern, this result indicates that the LCFS formed in this device does not differ greatly from the calculated LCFS.

責任著者(Corresponding author)

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