Non-Inductive Current Drive by EC Waves in an Inboard Poloidal Magnetic Field Null Configuration on the Spherical Tokamak QUEST

Saya TASHIMA; Hideki ZUSHI; Mitsutaka ISOBE; Hiroshi IDEI; Shoichi OKAMURA; Kazuaki HANADA; Kazuo NAKAMURA; Akihide FUJISAWA; Keisuke MATSUOKA; Makoto HASEGAWA; Yoshihiko NAGASHIMA; Shoji KAWASAKI; Hisatoshi NAKASHIMA; Aki HIGASHIJIMA; QUEST Team

doi:10.1585/pfr.8.2402118

Regular Articles

Non-Inductive Current Drive by EC Waves in an Inboard Poloidal Magnetic Field Null Configuration on the Spherical Tokamak QUEST

Saya TASHIMA, Hideki ZUSHI, Mitsutaka ISOBE, Hiroshi IDEI, Shoichi OKAMURA, Kazuaki HANADA, Kazuo NAKAMURA, Akihide FUJISAWA, Keisuke MATSUOKA, Makoto HASEGAWA, Yoshihiko NAGASHIMA, Shoji KAWASAKI, Hisatoshi NAKASHIMA, Aki HIGASHIJIMA, QUEST Team

著者情報

キーワード: non-inductive current drive, electron cyclotron resonance heating, energetic electron, high poloidal beta, trapped electron

ジャーナルフリー

2013 年 8 巻 p. 2402118

DOI https://doi.org/10.1585/pfr.8.2402118

詳細

抄録

To investigate the effects of confinement of fast electrons on poloidal beta equilibrium, experiments under different toroidal magnetic mirror ratios, M_OMFC, were performed in electron cyclotron heated plasma in the spherical tokamak QUEST. The proportional constants of the relation between plasma current and vertical magnetic fields decreased with increase in M_OMFC. The poloidal field null point appeared in the chamber for M_OMFC> 1.8 at a plasma current value of ∼15 kA. Poloidal beta and temperature of hard X-rays increased with M_OMFC. This suggests that high poloidal beta equilibrium plasma is produced by better confinement of energetic trapped particles.

責任著者(Corresponding author)

J-STAGEへの登録はこちら（無料）