摘要
利用2维半全电磁PIC程序进行数值模拟,设计了一种C波段磁绝缘线振荡器。该振荡器在阴极电子发射起点加圆环,控制此处电子束的发射密度,来减少电子能量的损耗,改善束-波互作用;逐渐加大慢波结构的后两个叶片的内半径,增大微波群速度,便于谐振腔中的能量输出,提高微波输出效率;采用两个扼流片有效地阻止了微波功率向二极管区泄漏,相应减小了器件的尺寸。当外加电压为430 kV、束流46 kA时,饱和后输出微波平均功率2 GW,频率3.51 GHz,功率转换效率10%。
Using a 2.5 dimensional fully electromagnetic particle-in-cell （PIC） code, a new type of MILO was designed. A circle is placed at the launch point to improve the interaction between the electron beam and the fields supported by the slow wave structure, thus to control the beam current density at the launch point, and to minimize the loss of the electron beam energy. The inner radii of the extractor vanes are slightly larger than those of other SWS vanes, which increases the axial group velocity and enhances the microwave output power and efficiency. Implementation of two RF choke vanes stops the leakage of microwave pulse power toward the diode, and makes the device more compact than the conventional MILO. High power microwave is generated from the device with an average output power of 2 GW, a frequency of 3.51 GHz and an efficiency of 10%.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2007年第2期284-287,共4页
High Power Laser and Particle Beams
基金
国家863计划项目资助课题
关键词
磁绝缘线振荡器
慢波结构
高功率微波
PIC方法
数值模拟
Magnetically insulated line oscillator（MILO）
Slow wave structure（SWS）
High power microwave（HPM）
PIC method
Numerical simulation
作者简介
郭焱华（1967-），女，硕士，主要从事微波器件研究；gyh1121618@sohu．com。
