A novel Ku-band relativistic transit-time oscillator with three-cavity extractor and distance-tunable reflector

作者：Ling, Junpu; He, Juntao^*; Zhang, Jiande; Song, Lili; Gao, Minghao

来源：Physics of Plasmas, 2017, 24(1): 013103.

DOI：10.1063/1.4973329

A novel Ku-band relativistic transit-time oscillator with a three-cavity extractor and a distance-tunable reflector is proposed. The physical mechanism of the three-cavity extractor and distance-tunable reflector is investigated by theory and simulation. It is shown that by introducing a three-cavity extractor instead of the dual-cavity one, the novel device has higher power capacity. Meanwhile, the three-cavity extractor is more favorable for increasing the beam-wave conversion efficiency of the device. In addition, analysis indicates that the distance-tunable reflector employed in the device plays important roles in the enhancement of conversion efficiency. Particle-in-cell simulations show that with the three-cavity extractor and distance-tunable reflector, this proposed device generates a 12.4 GHz, 2.2GW microwave, while the diode voltage is 570 kV, the beam current is 10.5 kA, and the guiding magnetic field is 0.7 T. The corresponding power efficiency reaches 37%. Published by AIP Publishing.

• 出版日期2017-1
• 单位中国人民解放军国防科学技术大学