Multiple bifurcation of the radial electric field structure induced by electrodes in tokamaks

N. Kasuya, K. Itoh, Y. Takase

研究成果: Contribution to journalConference article査読

6 被引用数 (Scopus)

抄録

An improved confinement state can be attained by imposing a radial electric field at the plasma edge. This is characterized by a change of the Er structure. A charge conservation equation with a diffusion term has been solved to explain this mechanism. Various types of Er structures with multiple peaks are allowed for the same boundary condition. The relationship between the voltage and the current is obtained by numerical calculation. Both stable and unstable regions exist in the stationary solutions and their boundary points are critical points for transition from one state to another. Multiple transitions and hysteresis are predicted. The magnitude of the collision frequency affects the existence of solutions with multiple peaks.

本文言語英語
ページ(範囲)A287-A292
ジャーナルPlasma Physics and Controlled Fusion
44
5 A
DOI
出版ステータス出版済み - 5 2002
外部発表はい
イベント8th IAEA Technical Committee Meeting on H-Mode Physics and Transport Barriers - Toki, 日本
継続期間: 9 5 20019 7 2001

All Science Journal Classification (ASJC) codes

  • 原子力エネルギーおよび原子力工学
  • 凝縮系物理学

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