High power 303 GHz gyrotron for CTS in LHD
作者: Y. YamaguchiJ. KasaT. SaitoY. TatematsuM. KoteraS. KuboT. ShimozumaK. TanakaM. Nishiura
作者单位: 1Research Center for Development of Far-Infrared Region, University of Fukui 910-8507, Japan
2National Institute for Fusion Science, Toki 509-5292, Japan
3Graduate School of Frontier Sciences, The University of Tokyo, Kashiwanoha 277-8561, Japan
刊名: Journal of Instrumentation, 2015, Vol.10 (10)
来源数据库: Institute of Physics Journal
DOI: 10.1088/1748-0221/10/10/C10002
原始语种摘要: A high-power pulsed gyrotron is under development for 300 GHz-band collective Thomson scattering (CTS) diagnostics in the Large Helical Device (LHD). High-density plasmas in the LHD require a probe wave with power exceeding 100 kW in the sub-terahertz region to obtain sufficient signal intensity and large scattering angles. At the same time, the frequency bandwidth should be less than several tens of megahertz to protect the CTS receiver using a notch filter against stray radiations. Moreover, duty cycles of ~ 10% are desired for the time domain analysis of the CTS spectrum. At present, a 77 GHz gyrotron for electron cyclotron heating is used as a CTS wave source in the LHD. However, the use of such a low-frequency wave suffers from refraction, cutoff and absorption at the electron...
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关键词翻译
关键词翻译
  • gyrotron 回旋管
  • cyclotron 回旋加速器
  • sufficiently 充足地
  • CTS Clear To Send
  • electron 电子
  • cavity 
  • neighbouring 相邻的
  • power 功率
  • diagnostics 诊断学
  • absorption 吸收