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Transition behaviour in the H-mode of the CHS heliotron/torsatron

K Toi, S Ohdachi, T Morisaki, S Sakakibara, S Morita, T Minami, K Tanaka, H Yamada, S Okamura, K Nishimura1996年Plasma Physics and Controlled FusionIF 2.2出版社

The H-mode initiated by the control of the rotational transform profile in CHS exhibits a very rapid transition (in 100 s or less) in NBI heated plasmas. There is no obvious difference in transition behaviour between hydrogen and deuterium. Langmuir probe measurement has revealed that the rapid change in floating potential occurs at the transition, but the change follows the formation of an edge transport barrier. The presence of an surface just inside the last closed flux surface and a sawtooth crash triggered by internal modes play an important role in the H-mode transition of CHS.

日本語訳

CHSにおける回転変換プロファイルの制御によって開始されるHモードは、NBI加熱プラズマにおいて非常に速い遷移(100秒以下)を示す。水素と重水素の間で遷移挙動に明確な差は見られない。ラングミュアプローブ測定により、浮遊電位の急激な変化が遷移時に発生することが明らかになったが、その変化はエッジ輸送障壁の形成に続いて生じる。最外殻磁気面のすぐ内側に位置する有理面の存在と、内部モードによって引き起こされる鋸歯状振動の崩壊が、CHSのHモード遷移において重要な役割を果たす。

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H-modeHeliotronCompact Helical System
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