0.65 THz回旋管双阳极电子枪的模拟与设计

Simulation and Design of a Double-Anode Electron Gun for 0.65 THz Gyrotrons

针对0.65THz二次谐波回旋振荡管的需求,对双阳极电子枪结构参量进行PIC模拟仿真。由于0.65THz二次谐波回旋管高频结构尺寸非常小,电子注与波互作用的引导中心半径更小,若要实现太赫兹器件的高功率、高效率输出,要求电子注速度离散足够小,层流性较好,需要对双阳极电子枪结构进行优化。经过大量模拟优化,得到了较好的结果,其电子注横纵速度比为1.28,速度离散为7.6%。

Based on the requirements of the 0.65 THz secondharmonicgyrotron, the parameters of double-anode magnetron injection gun （MIG） are simulated and optimized by PIC code. Because the 0.65THz secondharmonicgyrotron has a very small high-frequency structure and a smaller guiding center radius of electron beam-wave interaction, the electron beam velocity spread should be small enough to achieve high-power and high-efficiency output. Based on sufficient simulation and optimization, a double-anode electron gun with velocity spread of 7.6% and velocity ratio of 1.28is obtained.