物理学报Issue(10)：126-130,5.DOI:10.7498/aps.62.104104
相对论速调管中间腔与调制电子束间的非线性互作用*
Nonlinear interaction between modulated electron beam and the intermediate cavity of RKA
摘要
Abstract
In the relativistic klystron driven by intense relativistic electron beam, due to the influences of intense current and high electric field, especially the high Q value for the intermediate cavity, the nonlinear interaction between the intermediate cavity and the electron beam is very strong. It will significantly affect the performance of the device. According to the Maxwell equations and one-dimensional motion equation of electron, the self-consistent equation of the beam-wave interaction is obtained in the intermediate cavity. Based on these equations, the influences of the modulation depth and the modulation frequency on the amplitude and phase of gap voltage are studied respectively. The voltage amplitude obtained by the self-consistent equation is close to the voltage amplitude of particle in cell simulation, especially under the higher modulation depth compared with that obtained from the equivalent circuit model of conventional klystron. Meanwhile, the bandwidth of device becomes wide with the increase of the modulation depth. Finally, an S-band high-gain RKA is designed, and the corresponding experiments are done on the LTD accelerator. The output power with 1.1 GW is obtained, the gain is 49 dB.关键词
相对论速调管/非线性互作用/自洽方程Key words
RKA/nonlinear interaction/self-consistent equation引用本文复制引用
陈永东†,吴洋,谢鸿全,李正红,周自刚..相对论速调管中间腔与调制电子束间的非线性互作用*[J].物理学报,2013,(10):126-130,5.基金项目
国家自然科学基金(批准号:60971029,60872034,61271028)资助的课题.@@@@Project supported by the National Natural Science Foundation of China (Grant Nos．60971029,60872034,61271028) （批准号:60971029,60872034,61271028）
