Increase of Central Ion Temperature after Carbon Pellet Injection in Ne-Seeded NBI Discharges of LHD

Shigeru MORITA; Hideaki NOZATO; Yasuhiko TAKEIRI; Motoshi GOTO; Katsunori IKEDA; Shigeru INAGAKI; Osamu KANEKO; Kazuo KAWAHATA; Jyun-ichi MIYAZAWA; Sadatsugu MUTO; Takashi MUTOH; Kenichi NAGAOKA; Yoshio NAGAYAMA; Yoshihide OKA; Masaki OSAKABE; Byron J. PETERSON; Satoru SAKAKIBARA; Ryuichi SAKAMOTO; Kenji TANAKA; Tokihiko TOKUZAWA; Katsuyoshi TSUMORI; Hiroshi YAMADA; LHD Experimental Group

doi:10.1585/jspf.79.641

Rapid Communications

Increase of Central Ion Temperature after Carbon Pellet Injection in Ne-Seeded NBI Discharges of LHD

Shigeru MORITA, Hideaki NOZATO, Yasuhiko TAKEIRI, Motoshi GOTO, Katsunori IKEDA, Shigeru INAGAKI, Osamu KANEKO, Kazuo KAWAHATA, Jyun-ichi MIYAZAWA, Sadatsugu MUTO, Takashi MUTOH, Kenichi NAGAOKA, Yoshio NAGAYAMA, Yoshihide OKA, Masaki OSAKABE, Byron J. PETERSON, Satoru SAKAKIBARA, Ryuichi SAKAMOTO, Kenji TANAKA, Tokihiko TOKUZAWA, Katsuyoshi TSUMORI, Hiroshi YAMADA, LHD Experimental Group

著者情報

Shigeru MORITA
National Institute for Fusion Science
Hideaki NOZATO
Department of Frontier Science, University of Tokyo
Yasuhiko TAKEIRI
National Institute for Fusion Science
Motoshi GOTO
National Institute for Fusion Science
Katsunori IKEDA
National Institute for Fusion Science
Shigeru INAGAKI
National Institute for Fusion Science
Osamu KANEKO
National Institute for Fusion Science
Kazuo KAWAHATA
National Institute for Fusion Science
Jyun-ichi MIYAZAWA
National Institute for Fusion Science
Sadatsugu MUTO
National Institute for Fusion Science
Takashi MUTOH
National Institute for Fusion Science
Kenichi NAGAOKA
National Institute for Fusion Science
Yoshio NAGAYAMA
National Institute for Fusion Science
Yoshihide OKA
National Institute for Fusion Science
Masaki OSAKABE
National Institute for Fusion Science
Byron J. PETERSON
National Institute for Fusion Science
Satoru SAKAKIBARA
National Institute for Fusion Science
Ryuichi SAKAMOTO
National Institute for Fusion Science
Kenji TANAKA
National Institute for Fusion Science
Tokihiko TOKUZAWA
National Institute for Fusion Science
Katsuyoshi TSUMORI
National Institute for Fusion Science
Hiroshi YAMADA
National Institute for Fusion Science
LHD Experimental Group
National Institute for Fusion Science

キーワード: impurity pellet, ion temperature, NBI heating, density peaking, helical plasma

ジャーナルフリー

2003 年 79 巻 7 号 p. 641-642

DOI https://doi.org/10.1585/jspf.79.641

詳細

抄録

A cylindrical carbon pellet with a size of 1.0 mm^φ × 1.0 mm^L was injected into low-density (n_e =0.3−0.5 × 10¹³ cm^-3) neon-seeded NBI plasmas of the Large Helical Device (LHD). When the two NBI beam pulses were delayed just after the pellet injection, a large increment of central ion temperature up to5 keV was observed with the appearance of a peaked density profile (n_e0/⟨n_e⟩∼2.5) and enhanced toroidal rotation speed up to 35 km/s. Improvement of the ion transport is expected with the suggestion of a new operational scenario for confinement improvement in the LHD.

責任著者(Corresponding author)

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