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Alfvén wave heating, current drive, plasma flow and improved confinement scenarios in tokamaks

R M O Galvão, A G Elfimov, G Amarante-Segundo, V S Tsypin, L F Ruchko, I C Nascimento, M Tendler1999年Plasma Physics and Controlled FusionIF 2.2出版社

Theoretical results on Alfvén wave (AW) heating, current drive and plasma flow, which may be relevant for improved confinement scenarios, are presented. It is shown that a small population of light impurities, such as carbon, in a hydrogen plasma can strongly modify the dispersion of global Alfvén waves and the Alfvén continuum. The current drive and plasma flow induced by AWs are studied for magnetized weakly collisional plasmas. We find that plasma flow and ion banana orbit squeezing by the radial electric field shear induced by AWs may be a convenient trigger for the formation of transport barriers in tokamaks. These effects are explored via a series of numerical calculations for the heating conditions foreseen for the tokamak chauffage Alfvén wave heating experiment in Brazil (TCABR).

日本語訳

アルヴェン波(AW)加熱、電流駆動、およびプラズマ流に関する理論的結果を提示する。これらは閉じ込め改善シナリオに関連する可能性がある。水素プラズマ中の炭素などの軽不純物のわずかな存在が、大域的アルヴェン波およびアルヴェン連続体の分散を強く修正し得ることが示される。磁化された弱衝突プラズマにおいて、AWによって誘起される電流駆動とプラズマ流を研究する。AWによって誘起される動径電場シアによるプラズマ流とイオンバナナ軌道の圧縮が、トカマクにおける輸送障壁形成の好都合なトリガーとなり得ることが見出される。これらの効果は、ブラジルのトカマク・シャフォージュ・アルヴェン波加熱実験(TCABR)で想定される加熱条件に対する一連の数値計算を通じて探求される。

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Alfvén waveCurrent drivePlasma flowWave heatingImproved confinement
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