相对论返波管慢波结构的优化设计和数值模拟  

Optimization and simulation of a relativistic backward wave oscillator with a slow wave structure

作　　者：黄峰[1] 邢庆子[1] 王冬[1] 邓景康[1] 

机构地区：[1]清华大学物理系,北京100084

出　　处：《清华大学学报（自然科学版）》2006年第3期399-402,共4页Journal of Tsinghua University(Science and Technology)

基　　金：国家"八六三"高技术项目(2002AA837110)

摘　　要：以环形电子束驱动的、正弦型周期慢波结构的相对论返波管(RBW O)为基础,设计了一种新型慢波结构的RBW O。采用数值模拟的方法对RBW O慢波结构的起始端和末端进行了优化设计,对微波工作频率进行了预测。在磁场为2.5T、二极管电压为710 kV、电流为10 kA的条件下,获得了频率为7.5GH z、微波功率为1.21GW、转换效率为26.6%的微波输出。研究结果表明这种慢波结构相对原结构在微波输出功率和转换效率上都有很大提高,微波工作频率与预测相符合。A relativistic backward wave oscillator was designed based on a sinusoidal-period-type slow wave structure driven by an annular relativistic electron beam. The entrance and exit of the slow wave structure were optimized numerically with the microwave frequency also predicted by the analysis. For a magnetic field of 2.5 T, diode voltage of 710 kV, and diode current of 10 kA, the conversion efficiency is 26. 6% with a microwave frequency of 7.5 GHz and a power of 1.21 GW. The result indicates that the slow wave structure significantly improves the microwave output power and conversion efficiency. The simulated microwave frequency agrees well with the predicted value.

关 键 词：相对论返波管 过渡段 锥形慢波结构 数值模拟 高功率微波 

分 类 号：TN128[电子电信—物理电子学]