Effects of drifts on divertor plasma transport in LHD
Effects of drifts on divertor plasma transport in LHD
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DOI：
10.1016/j.nme.2019.01.009
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发表时间：
2019
影响因子：
2.6
通讯作者：
S. Masuzaki;Hirohiko Tanaka;Masahiro Kobayashi;G. Kawamura
中科院分区：
文献类型：
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作者：
S. Masuzaki;Hirohiko Tanaka;Masahiro Kobayashi;G. Kawamura
大型螺旋装置（LHD）中研究了位于对称磁场线结构位置的偏滤器瓦片上的不对称等离子体粒子负载。随着环形磁场方向的反转，不对称性也会发生逆转。这表明漂移影响不对称性。研究发现，不对称程度取决于边缘等离子体中的电子温度和环形磁场强度。随着电子温度的升高，不对称程度变大，然后饱和。在较低磁场放电中，不对称程度较大。氢、氘和氦之间不对称性的质量依赖性尚不清楚。结果表明 E×B 漂移在不对称性的形成中发挥作用。
An asymmetric plasma particle load on divertor tiles located at positions of symmetric magnetic field lines structure has been investigated in the Large Helical Device (LHD). The asymmetry reverses with reversing the toroidal magnetic field direction. This suggests that drifts affect the asymmetry. It is found that the degree of the asymmetry depends on the electron temperature in the edge plasma and on the toroidal magnetic field strength. The degree of the asymmetry becomes large and then saturates with an increase of electron temperature. In the lower magnetic field discharge, the degree of the asymmetry is larger. The mass dependence of the asymmetry is not clear among hydrogen, deuterium and helium. Results presented suggests thatE×Bdrift plays a role in formation of the asymmetry.