Parameter Regime of Ion Internal Transport Barrier Formation in the Large Helical Device

Kenichi NAGAOKA; Yasuhiko TAKEIRI; Katsumi IDA; Mikiro YOSHINUMA; Shigeru MORITA; Naoki TAMURA; Takeshi IDO; Akihiro SHIMIZU; Katsunori IKEDA; Masaki OSAKABE; Katsuyoshi TSUMORI; Haruhisa NAKANO; LHD Experiment Group

doi:10.1585/pfr.5.S2029

Regular Articles

Parameter Regime of Ion Internal Transport Barrier Formation in the Large Helical Device

Kenichi NAGAOKA, Yasuhiko TAKEIRI, Katsumi IDA, Mikiro YOSHINUMA, Shigeru MORITA, Naoki TAMURA, Takeshi IDO, Akihiro SHIMIZU, Katsunori IKEDA, Masaki OSAKABE, Katsuyoshi TSUMORI, Haruhisa NAKANO, LHD Experiment Group

著者情報

キーワード: ion heat transport, ion internal transport barrier, gradient reversal

ジャーナルフリー

2010 年 5 巻 p. S2029

DOI https://doi.org/10.1585/pfr.5.S2029

詳細

抄録

Improvement of ion heat transport was observed in the core plasma heated by neutral beam injection (NBI) in the Large Helical Device (LHD). A peaked ion temperature profile with a steep gradient (an ion internal transport barrier, ion ITB) formed in the plasma. To investigate the formation conditions of the ion ITB, a simple definition of ITB based on the reversal of the temperature gradient between the core and the edge is proposed. An ion ITB formed in the low-collisionality regime of 1/ν with low density and high ion heating power in the LHD.

責任著者(Corresponding author)

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