Identification of the energetic-particle driven GAM in the LHD
作者: T. IdoM. OsakabeA. ShimizuT. WatariM. NishiuraK. ToiK. OgawaK. ItohI. YamadaR. YasuharaY. YoshimuraS. KatoThe LHD Experiment Group
作者单位: 1National Institute for Fusion Science, Oroshi, Toki, Gifu 509-5292, Japan
2Graduate University for Advanced Study, 322-6 Oroshi, Toki, Gifu 509-5292, Japan
3Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
刊名: Nuclear Fusion, 2015, Vol.55 (8)
来源数据库: Institute of Physics Journal
DOI: 10.1088/0029-5515/55/8/083024
原始语种摘要: n = 0 modes with frequency chirping have been observed by a heavy ion beam probe and Mirnov coils in the large helical device plasmas, where n is the toroidal mode number. The spatial structures of the electrostatic potential fluctuation and the density fluctuation correspond to those of the geodesic acoustic mode (GAM). The modes are observed only during the tangential neutral beam injection with the energy of 175 keV. The energy spectra of fast ions measured by a neutral particle analyzer implies that the modes are excited by the fast ions through the inverse Landau damping. The absolute values and the temperature dependence of the frequency of the mode can be interpreted by the dispersion relation taking into account the measured energy spectra of the fast ions. Therefore, the observed...
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关键词翻译
关键词翻译
  • driven 从动的
  • particle 颗粒
  • modes 模式
  • energetic 能量的
  • measured 量过的
  • correspond 对应
  • geodesic 测地的
  • electrostatic 静电的
  • energy 能量
  • neutral 中性的