Effect of magnetic field configuration on parallel plasma flow during neutral beam injection in Heliotron J
Effect of magnetic field configuration on parallel plasma flow during neutral beam injection in Heliotron J
复制标题
Heliotron J 中性束注入过程中磁场配置对平行等离子体流的影响
DOI：
10.1088/0741-3335/55/3/035012
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
L Zang and F Sano
中科院分区：
文献类型：
--
作者：
H Lee;S Kobayashi;M Yokoyama;T Mizuuchi;T Minami;T Harada;K Nagasaki;H Okada;T Minami;S Yamamoto;S Murakami;Y Nakamura;S Konoshima;S Ohshima;L Zang and F Sano
通过在Heliotron J的高、标准和反转三种不同的环形镜结构中，利用电荷交换复合谱测量中性束注入过程中的平行流速度，研究了磁场结构对等离子体流速度的影响。在归一化平均小半径ρ= 0.07时，这些镜面配置的磁涟漪强度γ分别为γ= 0.073 m− 1、0.031 m− 1和0.027 m− 1。磁涟漪强度定义为γ={<（λ B/λ l）2/B2>} 1/2，其中λ<...>为磁通面平均值，l为沿着磁力线的长度。当ρ= 0.07时，高镜位形中的平行流速度（v = 4 km s− 1）比标准和反向镜位形中的平行流速度（v = 10-12 km s− 1）小2-3倍。一种预期的解释是，新古典阻尼力的差异导致了三种反射镜配置之间的v差异。
The effect of magnetic field configurations on plasma flow velocity was investigated by measuring the parallel flow velocity (v∥) using a charge-exchange recombination spectroscopy during neutral beam injection in three different toroidal mirror configurations of Heliotron J: high, standard and reversed mirror configurations. The magnetic ripple strengths, γ, for these mirror configurations were γ= 0.073 m− 1, 0.031 m− 1 and 0.027 m− 1, respectively, at the normalized averaged minor radius ρ= 0.07. The magnetic ripple strength is defined as γ={<(∂ B/∂ l) 2/B 2>} 1/2, where<...> is the flux surface averaged value and l is the length along the magnetic field line. At ρ= 0.07, the parallel flow velocity in the high mirror configuration (v∥∼ 4 km s− 1) was 2–3 times smaller than those in the standard and reversed mirror configurations (v∥∼ 10–12 km s− 1). An anticipated interpretation is that the difference in the neoclassical damping force contributes to the difference in v∥ among the three mirror configurations.