Study of neutral hydrogen transport in LHD core plasmas based on high dynamic-range Balmer-alpha spectroscopy
Study of neutral hydrogen transport in LHD core plasmas based on high dynamic-range Balmer-alpha spectroscopy
复制标题
基于高动态范围巴尔默-α 光谱的 LHD 核心等离子体中中性氢输运研究
DOI：
10.1088/0029-5515/55/6/063029
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发表时间：
2015
期刊：
影响因子：
3.3
通讯作者：
M.Goto and S.Morita
中科院分区：
文献类型：
--
作者：
K.Fujii;M.Goto and S.Morita
研究了大螺旋器件(LHD)中性氢原子密度和压强的径向分布及其与电子密度(Ne)的关系。原子密度分布是通过对强度校准的Balmer-α谱线的详细分析得到的，而压力分布则是由一个简单的一维解析模型得到的。我们首次测定了聚变取向等离子体中心的原子密度，它比边缘的原子密度小三个数量级以上。相反，原子压强从边缘到核心区的变化只有原来的10倍。核心区的原子密度和压强都与Ne负相关。在扩散理论的基础上，讨论了原子压强分布的小降幅和原子密度对原子密度的依赖性。
The radial distributions of the neutral hydrogen atom density and pressure in the large helical device (LHD) and their electron density (n e) dependence were studied. The atom density distribution was determined from a detailed analysis of the intensity-calibrated Balmer-α line profile while the pressure distribution was obtained with a simple one-dimensional analytical model. We determined for the first time the atom density at the centre of a fusion-oriented plasma, which is more than three orders smaller than that at the edge. On the contrary, the atom pressure changes only by a factor of 10 from the edge to core regions. Both the atom density and pressure in the core region have negative n e dependence. The smaller drop of the atom pressure profile and the n e dependence of the atom density were discussed based on the diffusion theory.