Observation of Runaway Electron Behaviour During Disruptions in LHCD Discharges in the HT‐7 Tokamak
Observation of Runaway Electron Behaviour During Disruptions in LHCD Discharges in the HT‐7 Tokamak
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DOI：
10.1002/ctpp.201000024
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发表时间：
2011-09
影响因子：
1.6
通讯作者：
H. Lu;L. Hu;S. Y. Li;R. Zhou;G. Zhong;the HT‐7 team
中科院分区：
文献类型：
--
作者：
H. Lu;L. Hu;S. Y. Li;R. Zhou;G. Zhong;the HT‐7 team
在HT-7托卡马克中观察到了破裂过程中逃逸电子的产生。在低杂波电流驱动（LHCD）限制器放电中观察到失控电流平台，它可以携带部分预击穿电流。结果表明，失控电流可以有效地缓解中断。我们可以使用气体吞吐来增加线平均密度，以抑制失控的电子并在中断后重建等离子体。详细的观测结果显示，在HT-7托卡马克放电中断后产生的逃逸电子。结果表明，磁振荡对逃逸电子在破裂过程中的损失起着重要作用。有两个重要的先决条件，以重建等离子体的失控电子后，中断。其中一种是弱磁振荡;另一种是LHW（低杂波）（© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA，魏因海姆）
Production of runaway electrons during disruptions has been observed in the HT‐7 Tokamak. The runaway current plateaus, which can carry part of the pre‐disruptive current, are observed in lower‐hybrid current drive (LHCD) limiter discharges. It is found that the runaway current can mitigate the disruptions effectively. We can use gas puffing to increase the line‐averaged density to restrain the runaway electrons and rebuild the plasmas after the disruptions. Detailed observations are presented on the runaway electrons generated following disruptions in the HT‐7 tokamak discharges. The results indicate that the magnetic oscillations play a significant role in the loss of runaway electrons in disruptions. There are two important preconditions to rebuild plasmas by runaway electrons after the disruptions. One of them are weak magnetic oscillations; another one are LHWs (lower‐hybrid waves) (© 2011 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)