Progress of microwave collective Thomson scattering in LHD
作者: K. TanakaM. NishiuraS. KuboT. ShimozumaT. Saito
作者单位: 1High-Temperature Plasma Physics Research Division, National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
2Interdisciplinary Graduate School of Engineering Science, Department of Advanced Energy Engineering, Kyushu University, Kasuga, Fukuoka, 816-8580, Japan
3Department of Energy Engineering and Science, Nagoya University, Nagoya, 464-8603, Japan
4Graduate School of Frontier Science, The University of Tokyo, Kashiwa, 277-8561, Japan
5Research Center for Development of Far-Infrared Region, University of Fukui, Fukui,910-8507, Japan
刊名: Journal of Instrumentation, 2015, Vol.10 (12)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1748-0221/10/12/C12001
原始语种摘要: Microwave collective Thomson scattering (CTS) by using a 77 GHz gyrotron is routinely working in LHD and the improvements of the system is now underway. The targets of this diagnostic are measurements of energetic fast ion distribution and ion ratio. In the present system, 800kW 77 GHz gyrotron is injected horizontally and scattered radiation is received changing scattering angle. The system works with existence of electron cyclotron resonance layer. Thus, most of the power is absorbed at the layer like beam damping and stray radiation dramatically decreases. Gyrotron is modulated at 40 Hz, then, background ECE, which is signal in gyrotron off phase, is subtracted from scattered signal in gyrotron on phase. The perturbation of electron temperature due to the gyrotron injection is almost...
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  • gyrotron 回旋管
  • scattering 散射
  • microwave 微波
  • cyclotron 回旋加速器
  • radiation 辐射
  • scattered 散射的
  • received 接收
  • qualitatively 从质量方面看
  • electron 电子
  • underway 航行中