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Electron Landau damping of toroidal Alfvén eigenmodes

J Candy1996年Plasma Physics and Controlled FusionIF 2.2出版社

A method to calculate the electron Landau damping of toroidal Alfvén eigenmodes (TAE) is presented. Owing to the presence of a small current produced by thermal electrons near the trapped - passing boundary, a jump in the electrostatic potential near the surface occurs. An analytic expression for this jump is derived in the low-, large-aspect-ratio limit, and is suitable for incorporation into either numerical eigenvalue codes or analytic models. In the limit of small magnetic shear, the calculation is performed analytically, giving a simple local expression for the damping.

日本語訳

トロイダルアルヴェン固有モード(TAE)の電子ランダウ減衰を計算する方法を提示する。捕捉-通過境界付近における熱電子によって生成される小さな電流の存在により、その境界付近で静電ポテンシャルの跳びが生じる。この跳びに対する解析的表現が、低周波・大アスペクト比極限において導出され、数値固有値コードまたは解析モデルのいずれにも組み込むことが可能である。小さな磁気シアの極限では、計算は解析的に実行され、減衰に対する簡潔な局所表現が得られる。

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Alfvén waveAlfvén eigenmodeLandau dampingToroidal Alfvén Eigenmode
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