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Finite pressure effects on reversed shear Alfvén eigenmodes

G J Kramer, N N Gorelenkov, R Nazikian, C Z Cheng2004年Plasma Physics and Controlled FusionIF 2.2出版社

The inclusion of finite pressure in ideal magnetohydrodynamic theory can explain the reversed magnetic shear Alfvén eigenmodes (RSAE) (or Alfvén cascades) that have been observed in several large tokamaks without the need to invoke an energetic particle mechanism for the existence of these modes. The chirping of the RSAE is caused by changes in the minimum of the magnetic safety factor, qmin, while finite pressure effects explain the observed non-zero minimum frequency of the RSAE when qmin has a rational value. Finite pressure effects also play a dominant role in the existence of the downward chirping RSAE branch.

日本語訳

理想磁気流体力学理論に有限圧力を含めることで、いくつかの大型トカマクで観測されている反転磁気シア・アルヴェン固有モード(RSAE)(またはアルヴェン・カスケード)を、これらのモードの存在のために高エネルギー粒子機構を必要とせずに説明することができる。RSAEのチャーピングは磁気安全係数の最小値qminの変化によって引き起こされ、一方、有限圧力効果は、qminが有理数値をとるときに観測される非ゼロの最小周波数を説明する。有限圧力効果はまた、下方チャープRSAE分枝の存在において支配的な役割を果たす。

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Alfvén waveAlfvén eigenmodeReversed magnetic shearShear Alfvén waves
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