红外与毫米波学报, 2019, 38 (5): 662, 网络出版: 2019-11-19
太赫兹二次谐波回旋振荡器时域多模分析
Multimode time domain analysis of terahertz second harmonic cyclotron oscillator
摘要
推导了时域多模公式并结合频域单模理论对 394 GHz二次谐波回旋管进行了模式激励及模式互作用分析。当工作电压为 15 kV,工作磁场为 7. 185 T,在频域单模稳态计算中 TE2 工作模工作电流为 0. 25 A时,261-不能起振,式 TE2 时域多模仿真结果显示 TE2 261-均能在 393. 87 GH稳定振荡, TE261 +2 在最终振荡中261 +达到稳定振荡; 261 +和 TE2 占主导地位,其输出功率和效率分别为 136. 8 W、3. 6 %,两者获得的工作模式的输出特性完全吻合。
Abstract
This paper derived time domain multimode formula and combined it with the frequency single modetheoryto investigate mode oscillation and mode interaction of a 394 GHz gyrotron. The gyrotron reaches a TE2261+ and TE2261- modes oscillate at 393.87 GHz in time domain theory while TE2261- cannot oscillate in frequency domain theory when the beam voltage is 15 kV, the magnetic field is 7.185 T, and beam current is 0.25 A. TE2261+ mode dominates the final oscillation, which output power and efficiency are 136.8 W and 3.6%, respectively. The output characteristics of the operating mode obtained by two theories are identical.
王雪微, 薛谦忠, 张珊, 赵国慧, 刘高峰. 太赫兹二次谐波回旋振荡器时域多模分析[J]. 红外与毫米波学报, 2019, 38(5): 662. WANG Xue-Wei, XUE Qian-Zhong, ZHANG Shan, ZHAO Guo-Hui, LIU Gao-Feng. Multimode time domain analysis of terahertz second harmonic cyclotron oscillator[J]. Journal of Infrared and Millimeter Waves, 2019, 38(5): 662.