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Boundary conditions for the stability analysis of high beta plasmas confined by anisotropic inhomogeneous walls

G F Nalesso1989年Plasma Physics and Controlled FusionIF 2.2出版社

This paper discusses a possible approach to the solution of the problem of the stability of a thermonuclear plasma confined by a wall of finite, anisotropic and inhomogeneous conductivity. To simulate a spatially non-homogeneous structure (like, e.g., a cage of conducting rods), a model has been considered which assumes an anisotropic and space-dependent conductivity of the confining wall. It is shown that the effect of the region external to the plasma, including the conducting wall itself, can be taken into account simply by imposing a set of boundary constraints to the plasma variables at the plasma edge. These boundary conditions are derived for the most general case, while the linear stability of an RFP plasma surrounded by an anisotropic thin liner is discussed in order to understand the role of a resistive liner on the stability of the Padova RFX experiment.

日本語訳

本論文は、有限で異方性および不均一な導電率を持つ壁によって閉じ込められた熱核プラズマの安定性問題に対する一つの可能な解法について論じる。空間的に不均一な構造(例えば、導電性ロッドのケージ)をシミュレートするために、閉じ込め壁の異方性かつ空間依存性のある導電率を仮定したモデルが検討されている。プラズマ外部の領域(導電性壁自体を含む)の影響は、プラズマ端部に一連の境界条件を課すことによって簡単に考慮できることが示されている。これらの境界条件は最も一般的な場合について導出され、一方で、異方性薄膜に囲まれたRFPプラズマの線形安定性が、パドヴァRFX実験における抵抗性ライナーの安定性への影響を理解するために議論されている。

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