The observation of field-aligned current during type-III ELM in EAST

The observation of field-aligned current during type-III ELM in EAST
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EAST III型ELM期间场对准电流的观测

DOI:
10.1080/10420150.2017.1359598
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发表时间:
2017-08
影响因子:
1
通讯作者:
Shao L. M.
Shao L. M.
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Zhao N.;Yan N.;Xu G. S.;Wang Z. X.;Wang H. Q.;Zhang W.;Wang L.;Liu S. C.;Ding S. Y.;Chen R.;Shao L. M.

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在实验先进超导托卡马克装置上,利用一种先进的、快速移动的静电和磁探针系统直接探测边缘等离子体,测量了与Ⅲ型边缘局域模(ELM)有关的载流细丝。与预期相反,在分界线附近没有检测到电流丝。然而,在远刮离层(SOL)中观察到电流细丝的明显特征,其中连接细丝的偏滤器板之间的电压差足够大,从而强烈地表明载流细丝在SOL中形成,而不是从分界线内的等离子体中喷出。这些研究结果提供了,第一次,在III型ELMy H模式的电流丝的形成和维持的信息。
ABSTRACT Measurements of current-carrying filaments associated with Type-III edge localized mode (ELM) have recently been made in the Experimental Advanced Superconducting Tokamak by direct probing of the edge plasma using an advanced, fast-moving electrostatic and magnetic probe system. Contrary to expectations, no current filaments were detected near the separatrix. However, a clear signature of current filament has been observed in the far scrape-off layer (SOL) where the difference of the voltage between the divertor plates connecting a filament is sufficiently large, thus strongly suggesting that the current-carrying filaments form in the SOL, rather than being ejected from the plasma inside the separatrix. These findings provide, for the first time, information on the formation and sustainment of current filaments during type-III ELMy H-modes.
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