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Edge safety factor at the onset of plasma disruption during VDEs in JT-60U

Masayoshi Sugihara, Victor Lukash, Rustam Khayrutdinov, Yuzuru Neyatani2004年Plasma Physics and Controlled FusionIF 2.2出版社

Detailed examinations of the value of the edge safety factor (qa) at the onset of thermal quench (TQ) during intentional vertical displacement event (VDE) experiments in JT-60U are carried out using two different reconstruction methods, FBI/FBEQU and DINA. The results from the two methods are very similar and show that the TQ occurs when the qa value is in the range between 1.5 and 2. This result suggests that the predictive simulations for VDEs should be performed within this range of q to examine the subsequent differences in the halo currents, plasma movement and other plasma behaviour during the current quench.

日本語訳

JT-60Uにおける意図的な垂直変位事象(VDE)実験中の熱クエンチ(TQ)開始時の周辺安全係数(qa)の値について、2つの異なる再構成手法、FBI/FBEQUおよびDINAを用いて詳細な検討を行った。2つの手法による結果は非常に類似しており、TQはqa値が1.5から2の範囲にあるときに発生することが示された。この結果は、VDEの予測シミュレーションをこのqa範囲内で実施し、電流クエンチ中のハロー電流、プラズマ運動、その他のプラズマ挙動におけるその後の差異を検討すべきことを示唆している。

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Plasma disruptionJT-60USafety factor
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