Initial experiments towards edge plasma control with a closed helical divertor in LHD

Initial experiments towards edge plasma control with a closed helical divertor in LHD
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LHD 中使用封闭式螺旋偏滤器进行边缘等离子体控制的初步实验

DOI:
10.1088/0029-5515/53/6/063014
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发表时间:
2013
期刊:
影响因子:
3.3
通讯作者:
M. Kobayashi
M. Kobayashi
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
T. Morisaki;S. Masuzaki;M. Kobayashi

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为了主动控制边缘等离子体,在大型螺旋装置中构造了一个挡板结构的闭式螺旋偏滤器(CHD),该装置由安装在环面内侧的10个离散模块组成。在这个阶段,十个模块中的两个已经构建完成。在最初的实验中,对CHD的性能进行了实验研究,并与数值预期进行了比较。在连续吹气放电过程中,观察到CHD内的中性压力比开式螺旋偏滤器内的中性压力高出十几倍,这与数值模拟结果吻合得很好。在高密度状态下,CHD有偏滤器脱落的迹象,这是由于CHD的高循环和高密度状态所致。利用潘宁放电诊断仪,通过同时测量氢气和氦的压力,研究了中性粒子在混合气体放电中的行为。CHD中两种气体之间的压缩特性相似,尽管氦具有更大的循环特性。
A baffle-structured closed helical divertor (CHD) is being constructed in the Large Helical Device to actively control the edge plasma, which consists of ten discrete modules installed on the inboard side of the torus. At this stage, two of the ten modules have been constructed. In the initial experiments, the performance of the CHD was experimentally investigated, comparing with numerical expectations. During the continuous gas puffing discharge, it was observed that the neutral pressure in the CHD was more than ten times higher than that in the open helical divertor, which agrees well with the numerical simulation. In the high-density regime, an indication of divertor detachment was observed in the CHD, which was caused by the high recycling and the high-density state in the CHD. With a Penning discharge diagnostics, the neutral particle behaviour in the mixture gas discharge was investigated, measuring hydrogen and helium pressures simultaneously. Similar compression properties were observed between two gases in the CHD, although larger recycling character was seen in helium.
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影响因子: 2.2
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DOI: --
发表时间: 2008
期刊: Contributions to Plasma Physics 48
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