X波段准周期加载微波腔研究

 准周期加载微波腔的基本结构是周期结构，在强引导磁场作用下，强流电子束同微波强作用产生高功率微波；作用过程分为三个阶段：电子俘获、群聚和换能；而周期结构的作用主要在于电子俘获。适当设计的结构，不仅束波转换效率高，而且对电子束质量（如能散）的要求也不高。从微波场对电子运动的影响，研究了电子束在微波腔中的俘获、群聚和换能的束波互作用过程。基于760kV，7kA的环形电子束，采用准周期加载微波腔结构，在模拟上获得了X波段（9.3GHz）峰值功率为1.3GW的微波输出，效率接近24%。

Investigation of quasi-periodic RF cavity for high power microwave source

The main part of quasi-periodic RF cavity is the periodic structure. With the strong leading magnet field, the relativistic electron beam can produce high power microwave in such cavity. The interaction between the beam and the microwave field can be divided into three processes: electron capture, bunch and electron momentum turning into microwave field. The role of the main part is for electron capture. High efficiency and high microwave power can be obtained with optimized cavity. In this paper, the electron movement is studied under the action of the microwave field in the cavity, and electron capture and bunch are also explored. In the simulation, the output power of 1.3GW is obtained at X-band(9.3GHz) using such cavity driven by ring beam, whose parameters are 760kV and 7kA, and the efficiency of the beam momentum into microwave is close to 24%.