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Modification of edge current profile and improved confinement induced by biased electrode in the very low qa (VLQ) discharges of SINP – tokamak

Joydeep Ghosh, Rabindranath Pal, P.K. Chattopadhyay, Debjyoti Basu2007年被引用 4Nuclear FusionIF 3出版社

A better energy-confined state with modified current density profile is achieved by fast biasing (applied voltage rise time ∼ the ion–ion collision time) an electrode placed inside the limiter in very low qa discharges of the Saha Institute of Nuclear Physics–tokamak (SINP–Tokamak) (Lahiri et al1996 Nucl. Fusion36 254). The plasma current increases and lasts for an extended period. Profile modification of the radial electric field (Er) in the edge region is also observed in the better-confined state. However, jΦ-profile modification as well as energy confinement time improvement occurs prior to Er-profile modification.

日本語訳

より良いエネルギー閉じ込め状態は、修正された電流密度分布を伴い、Saha Institute of Nuclear Physics–tokamak (SINP–Tokamak) (Lahiri et al1996 Nucl. Fusion36 254) の非常に低いq値の放電において、リミター内側に配置された電極への高速バイアス(印加電圧の立ち上がり時間 ∼ イオン–イオン衝突時間)によって達成される。プラズマ電流は増加し、長時間持続する。より良い閉じ込め状態では、周辺領域における径方向電場 (Er) の分布の修正も観測される。しかしながら、jΦ分布の修正およびエネルギー閉じ込め時間の改善は、Er分布の修正よりも先に発生する。

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