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

机译:次谐波振荡的亚太赫兹回旋加速器的新功率记录

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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.
机译:FIR FU中正在开发高功率亚太赫兹脉冲回旋管,用于在聚变等离子体上,特别是在诸如LHD生产的高密度等离子体上,对集体Thomson散射(CTS)测量进行应用。最近,在二次谐波(SH)振荡的情况下,我们在约388 GHz的频率下获得了62 kW的新功率记录。根据此结果,我们对回旋管的电子枪进行了改进,以将电子束更牢固地耦合到另一种振荡模式,该振荡模式的峰值耦合系数是62 kW模式的两倍。使用新模式进行的振荡测试在约389 GHz时获得了83 kW的更高功率。这些结果构成了太赫兹回旋管的新的二次谐波振荡功率记录。

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