毫米波回旋超辐射的粒子模拟与实验研究

 为开发回旋超辐射在毫米波和亚毫米波超辐射高功率微波源中的优势,采用3维PIC粒子模拟对回旋超辐射的工作特性进行了分析，并在此基础上优化设计了器件结构及工作参数范围。模拟表明，微波峰值功率与电子束脉宽在一定范围内成平方关系，符合超辐射的典型特征。初步实验在210 kV, 250 A的电子束参数下获得了6 MW的微波峰值功率输出，工作频率37.2 GHz，模式为TE01，与粒子模拟的结果基本一致。

Simulation and experimental study of cyclotron superradiance at millimeter-wave band

A cyclotron superradiance(SR) which combines the merits of cyclotron and SR has a potential advantage in developing superradiant HPM sources operating at millimeter and submillimeter wavebands. The working characteristics of the cyclotron SR was analyzed using 3D PIC simulation,based on which the working parameters were optimized. A square relation between the beam pulse width and the peak power was given, which proved that the system worked in the SR regime. Preliminary experiment shows that when the beam parameters were 210 kV, 250 A and the guiding magnetic field was 1.73 T, microwave pulses were acquired, with the peak power of 6 MW, the peak power conversion efficiency of 11.4%, the frequency of 37.2 GHz and TE01 output mode. The results are in accordance with the simulation ones.