A Method to Separate Radiations From a Dual-Frequency Operation Gyrotron

作者：Liu, Diwei; Wang, Wei^*; Song, Tao; Zhuang, Qianmeng; Shen, Hao; Deng, Shichao

来源：IEEE Transactions on Electron Devices, 2016, 63(5): 2145-2148.

DOI：10.1109/TED.2016.2544806

• Dual frequency
• filter
• gyrotron
• quasioptical (QO) technique

A method was proposed to efficiently separate radiations from a dual-frequency operation gyrotron. The operation modes TE02 and TE04 are converted into linearly polarized Gaussian beams, and the theoretical predictions of the power conversion efficiency are 85% for TE02 mode and 90% for TE04 mode, respectively. The linearly polarized beams with different frequencies are oblique incident toward a spatial filter based on the frequency-selective surface, the beam at 0.11 THz is totally reflected, the beam at 0.22 THz is transmitted, and the transmittance is similar to 95%. The transmission characteristics of the spatial filter change a little when the incident angle ranges from 0 degrees to 30 degrees. The preliminary experiment for the transmission coefficient of the spatial filter is carried out when the incident angle is 0 degrees, the trend of the transmission coefficient from the theoretical predictions agrees well with the experimental results, but there is a little difference at 0.11 and 0.22 THz due to the fabrication error.

• 出版日期2016-5
• 单位电子科技大学