High-Power Microwave Oscillation of a 94 GHz Gyrotron for Air-Breakdown Plasma Observations in Microwave Rocket
High-Power Microwave Oscillation of a 94 GHz Gyrotron for Air-Breakdown Plasma Observations in Microwave Rocket
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用于微波火箭空气击穿等离子体观测的 94 GHz 回旋管高功率微波振荡
DOI：
10.1109/irmmw-thz50926.2021.9567447
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Sakamoto K.
中科院分区：
文献类型：
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作者：
Tabata K.;Manabe A.;Komurasaki K.;Kariya T.;Minami R.;Imai T.;Oda Y.;Fukunari M.;Yamaguchi Y.;Tatematsu Y.;Hayashi K.;Ikeda R.;Kajiwara K.;Takahashi K.;Sakamoto K.
我们报道了 94 GHz 回旋管的高功率微波振荡，为微波火箭中空气击穿等离子体的研究做出了贡献。陀螺仪可拆卸，采用二极管磁控管注入枪和内置准光模式转换器，安装在孔径为100毫米的紧凑型超导磁体中。在这项研究中，使用热释电探测器和液体热成像片在40 kV的束电压和约20 A的束电流下检测微波信号。此外，用于微波火箭推力产生的空气击穿等离子体在大气压下成功点燃。在传播速度为 720 m/s 时观察到的等离子体丝状结构与 170 GHz 不同，这表明等离子体结构具有频率依赖性。
We report high-power microwave oscillation of a 94 GHz gyrotron, contributing to the study on air breakdown plasma in Microwave Rocket. The gyrotron is demountable, adopting a diode magnetron injection gun and a built-in quasi-optical mode converter, installed in a compact superconducting magnet with a bore diameter of 100 mm. In this study, microwave signal was detected using a pyroelectric detector and a liquid thermograph sheet at the beam voltage of 40 kV and beam current of about 20 A. Besides, air breakdown plasma, useful for the thrust generation of Microwave Rocket, was successfully ignited at atmospheric pressure. The observed plasma's filamentary structure at the propagation velocity of 720 m/s was different from 170 GHz, which indicates a frequency dependence of the plasma structure.