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Integrated view of disruption dynamics on internal electromagnetic and plasma structures in the small tokamak HYBTOK-II

M. Okamoto, S. Takamura, N. Ohno, S. Kajita, Y. Kikuchi, Y. Uesugi, T. Ozeki, Y. Kawano, M. Sugihara2007年被引用 4Nuclear FusionIF 3出版社

An integrated view of disruption dynamics on internal plasma and associated electromagnetic structures with a high time resolution is presented in a systematic way. The main results are as follows: (i) observation of electron temperature oscillation due to rotation of magnetic islands of m(poloidal)/n(toroidal) = 3/2 mode numbers before the current quench, (ii) finding of rapid pump-out (∼20 µs) of plasma current and particles from the central core region to the edge just at the current quench start time and then returning to a peaked profile during the following slow decay phase and (iii) a new proposal for the evaluation of current quench time and the electron temperature dependence of the current quench time, the so-called τ/S scaling.

日本語訳

内部プラズマおよび関連する電磁構造におけるディスラプション力学の統合的見解が、高い時間分解能で系統的に提示される。主な結果は以下の通りである:(i) 電流クエンチ前におけるm(ポロイダル)/n(トロイダル) = 3/2モード数の磁気島の回転による電子温度振動の観測、(ii) 電流クエンチ開始時ちょうどに、プラズマ電流と粒子の中心コア領域から端部への急速なポンプアウト(∼20 µs)を発見し、その後、続く緩やかな減衰位相の間にピーク状分布へ戻ること、および(iii) 電流クエンチ時間と電流クエンチ時間の電子温度依存性、いわゆるτ/Sスケーリングの評価に関する新たな提案。

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