Response of plasma toroidal flow to the transition between nested and stochastic magnetic field in LHD
作者: K. IdaM. YoshinumaH. TsuchiyaT. KobayashiC. SuzukiM. YokoyamaA. ShimizuK. NagaokaS. InagakiK. ItohThe LHD Experiment Group
作者单位: 1National Institute for Fusion Science, Toki, Gifu 509-5292, Japan
2The Graduate University for Advanced Studies, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
3Research Institute for Applied Mechanics, Kyushu Univ., Kasuga, 816-8580, Japan
刊名: Nuclear Fusion, 2017, Vol.57 (7)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1741-4326/aa6f84
原始语种摘要: Response of the plasma toroidal flow to the forward and backward transition between the nested and the stochastic magnetic field is studied using the charge exchange spectroscopy in the large helical device (LHD). Abrupt damping of toroidal flow associated with a transition from nested magnetic flux surface to a stochastic magnetic field is observed when the magnetic shear at the rational surface decreases to 0.5 after the exchange of the neutral beam injection (NBI) direction from co- to counter-direction in LHD. The stochastization of magnetic field occurs only in a narrow range of magnetic shear near 0.5 and spontaneous back-transition from stochastic to nested magnetic field (healing) is observed in the steady-state phase of magnetic shear. When the NBI direction is changed from...
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  • transition 转移
  • magnetic 磁的
  • toroidal 环面
  • nested 嵌套
  • stochastic 随机的
  • field 
  • between 在中间
  • counter 计数器
  • shear 切变
  • plasma 深绿玉髓