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Ballooning stability of a toroidally rotating plasma

A. Sen, A.K. Sundaram1989年被引用 10Nuclear FusionIF 3出版社

The stability of high (m, n) ideal ballooning modes in a toroidal plasma experiencing a rigid rotation about its axis of symmetry is investigated. Centrifugal forces induce poloidal asymmetry in the plasma pressure and affect the position and form of the magnetic surfaces. This leads to stabilization of the ballooning modes in all but the outer plasma regions (i.e for r < Lp, where Lp is the pressure scale length). Stabilization is possible for rather modest values of the parameter , where ∊ is the inverse aspect ratio, V0 is the rotation velocity and Cs is the sound velocity. The analysis also indicates that plasma rotation can help gain access to the second stability regime in high beta experiments.

日本語訳

トロイダルプラズマにおける高(m,n)理想バルーニングモードの安定性が、対称軸周りの回転を経験する場合について調べられている。遠心力はプラズマ圧力にポロイダル非対称性を誘起し、磁気面の位置と形状に影響を与える。これにより、バルーニングモードはプラズマ外部領域を除くすべての領域で安定化される(すなわち、r < Lpの場合。ここでLpは圧力スケール長である)。安定化は、パラメータの比較的小さな値で可能である。ここで、∊は逆アスペクト比、V0は回転速度、Csは音速である。また、この解析は、高ベータ実験においてプラズマ回転が第二安定領域へのアクセスを促進し得ることを示している。

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Ballooning modeRotating plasma
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