强激光与粒子束2011，Vol.23Issue(11)：3051-3054,4.DOI:10.3788/HPLPB20112311.3051
低磁场过模慢波结构型高功率毫米波发生器的改进
Improvement of high power overmoded millimeter-wave generator operating at low magnetic field
摘要
Abstract
A high power millimeter wave generator has been investigated and improved by particle in cell(PIC) simulations and experiments. Overmoded slow wave structures (SWSs) were adopted to increase power capacity. In order to realize single mode and single frequency operation, one useful method for mode selection was used, I. E. To shift the operating point close to π mode of TM01 wave. Due to the adoption of overmoded SWSs and proper design of the device, the guiding magnetic field could be reduced. The experiments were carried out at the TORCH-01 accelerator. The produced microwave frequency was measured by dispersive line method, and the power was estimated by integrating over the radiation pattern in far field. Rectangular-shaped SWSs were used in primary design, and a 33. 56 GHz millimeter wave with an output power of about 110 MW and pulse duration of 7-8 ns was measured. It was then hard to increase the output power and pulse width, and evidences of RF breakdown were also found at the edges of SWSs. Numerical calculations showed that the frequency of TM01-π mode did not change much when the edges of SWSs were rounded. After the improvements, with guiding magnetic field of 0. 8 T, and diode voltage and current of 590 kV and 5. 2 kA, respectively, a 33. 56 GHz millimeter wave with an output power of 320 MW and efficiency of about 10% was generated, the microwave mode was quasi-TM01 mode, the pulse duration was lengthened to 13 ns, and no obvious evidence of breakdown was observed.关键词
高功率微波/毫米波发生器/过模慢波结构/击穿Key words
high power microwaves millimeter wave generator/ overmoded slow wave structures/ breakdown分类
信息技术与安全科学引用本文复制引用
朱俊,舒挺,张军,张泽海,樊玉伟,高景明,李国林,周生岳,许流荣..低磁场过模慢波结构型高功率毫米波发生器的改进[J].强激光与粒子束,2011,23(11):3051-3054,4.基金项目
国家自然科学基金项目(11075211) （11075211）
国家高技术发展计划项目 （）
