New Power Records of Sub-Terahertz Gyrotron with Second-Harmonic Oscillation
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概要
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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.
著者
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Ogawa Isamu
Research Center For Development Of Far Infrared Region Fukui University
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Tatematsu Yoshinori
Research Center For Development Of Far Infrared Region University Of Fukui
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TATEMATSU Yoshinori
Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
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IKEDA Ryosuke
Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
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SAITO Teruo
Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
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Saito Teruo
Research Center for Developement of Far-Infrared Region, University of Fukui, Fukui 910-8507, Japan
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MANUILOV Vladimir
Nizhny Novgorod State University, Nizhny Novgorod 603600, Russia
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OGASAWARA Shinya
Department of Energy Engineering and Science, Nagoya University, Nagoya 464-8463, Japan
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YAMADA Naoki
Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
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IKEUCHI Shinji
Research Center for Development of Far-Infrared Region, University of Fukui, 3-9-1 Bunkyo, Fukui 910-8507, Japan
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OGASAWARA Shinya
Department of Energy and Technology, Nagoya University
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