New Power Records of Sub-Terahertz Gyrotron with Second-Harmonic Oscillation

DOI Web Site 被引用文献4件 参考文献10件
  • SAITO Teruo
    Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
  • OGASAWARA Shinya
    Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8463, Japan
  • YAMADA Naoki
    Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
  • IKEUCHI Shinji
    Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
  • TATEMATSU Yoshinori
    Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
  • IKEDA Ryosuke
    Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
  • OGAWA Isamu
    Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
  • MANUILOV Vladimir N.
    Nizhny Novgorod State University, Nizhny Novgorod 603600, Russia

抄録

High-power sub-terahertz pulse gyrotrons are under development in FIR FU for application to collective Thomson scattering (CTS) measurement on fusion plasmas, especially on high-density plasmas such as those produced in LHD. Recently, we achieved a new power record of 62 kW at approximately 388 GHz with second-harmonic (SH) oscillation. Following this result, we modified the electron gun of the gyrotron to couple the electron beam more strongly to another oscillation mode that has a peak coupling coefficient two times as large as that of the 62 kW mode. Oscillation tests with the new mode attained higher power of 83 kW at about 389 GHz. These results constitute new second-harmonic-oscillation power records for sub-terahertz gyrotrons.

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