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Comments on "Absolute dissipative drift-wave instabilities in tokamaks", by L. Chen, M.S. Chance, C.Z. Cheng

R. Marchand, P.N. Guzdar1982年被引用 2Nuclear FusionIF 3出版社

In a recent paper, Chen et al. considered the destabilization of the universal mode in a tokamak by electron-ion collisions. In their analysis, a large-aspect-ratio tokamak with circular concentric flux surfaces was assumed and collisions were modelled by a parallel friction term in the electron equation of motion. Attention was focused on perturbations with large toroidal mode numbers, and use was made of the simplifying ballooning-mode representation. The particular form of the ballooning-mode formalism used, however, necessitated a truncated Taylor series in ωde/ω (to be defined later) and, thereby, resulted in an approximate eigenmode equation.

日本語訳

最近の論文において、Chenらはトカマクにおける普遍モードの電子-イオン衝突による不安定化を考察した。彼らの解析では、円形磁気面を有する大アスペクト比トカマクが仮定され、衝突は電子の運動方程式における平行摩擦項によってモデル化された。大きなトロイダルモード数を有する摂動に注目し、簡略化されたバルーニングモード表現が用いられた。しかしながら、用いられたバルーニングモード形式の特定の形は、ωde/ω(後で定義される)における打ち切りテイラー級数を必要とし、その結果、近似固有モード方程式が導かれた。

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