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Flute instability in an axially symmetric plasma with finite ion Larmor radius

Yu.N. Dnestrovsky, D.P. Kostomarov, L.F. Suzdaltseva1968年被引用 2Nuclear FusionIF 3出版社

Solving numerically the integro-differential equation for plasma oscillations, the authors study the effect of the size of the ion Larmor radius ri and of an intrinsic electric field on the flute instability of a plasma. It is shown that, in a dilute plasma (, where ω0i and ωi, are the plasma and Larmor frequencies of the ions), effects attributable to the finiteness of ri are small and cannot explain the stabilization of oscillations in the Phoenix device. Intrinsic electric fields due to an excess of ions improve the stability of such a plasma. If the magnetic field gradient is small (aH'/H ∼ 0.1, where a is the characteristic dimension of the plasma) and the Larmor radius is of reasonable size (ri ∼ 0.2a). a relatively dense plasma surrounded by a conducting sheath may be stable.

日本語訳

プラズマ振動に対する積分微分方程式を数値的に解くことにより、著者らは、イオン・ラーモア半径riの大きさと固有電場がプラズマのフルート不安定性に及ぼす効果を研究する。希薄プラズマ(, ここでω0iとωi, はイオンのプラズマ周波数およびラーモア周波数である)では、riの有限性に起因する効果は小さく、Phoenix装置における振動の安定化を説明できないことが示される。イオン過剰による固有電場は、そのようなプラズマの安定性を改善する。もし磁場勾配が小さく(aH'/H ∼ 0.1、ここでaはプラズマの特性寸法である)かつラーモア半径が妥当な大きさであるならば(ri ∼ 0.2a)。導電性シースで囲まれた比較的密度の高いプラズマは安定であり得る。

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