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Electromagnetic and kinetic effects on the ion temperature gradient mode

J. Weiland, A. Hirose1992年被引用 93Nuclear FusionIF 3出版社

Effects of finite beta , ion kinetic damping and trapped electrons on the toroidal ion temperature gradient (ITG) mode have been investigated by two methods-a fully toroidal fluid analysis corrected for ion Landau damping, and an electromagnetic local kinetic dispersion relation. When trapped electrons are ignored, the ITG mode is stabilized at a beta value well below the critical beta for the ideal MHD ballooning mode (βMHD). Trapped electrons are destabilizing and increase the upper limit of beta to a level comparable with βMHD. Ion Landau damping increases the critical temperature gradient typically by a factor of two (LT/LB ≲ 0.18), and the growth rate remains smaller than the ion transit frequency, ωTi = k||vTi

日本語訳

有限ベータ、イオン運動論的減衰、および捕捉電子がトロイダルイオン温度勾配(ITG)モードに及ぼす影響を、2つの方法—イオンランダウ減衰を補正した完全トロイダル流体解析、および電磁的局所運動論的分散関係—によって調べた。捕捉電子を無視した場合、ITGモードは理想MHDバルーニングモードの臨界ベータ(βMHD)をはるかに下回るベータ値で安定化される。捕捉電子は不安定化に寄与し、ベータの上限をβMHDに匹敵するレベルまで引き上げる。イオンランダウ減衰は臨界温度勾配を典型的に2倍に増加させ(LT/LB ≲ 0.18)、成長率はイオン通過周波数ωTi = k||vTiよりも小さく保たれる。

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Ion temperature gradientTemperature gradient mode
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