W波段回旋行波管双阳极磁控注入电子枪的设计

Design a Double Anode Magnetron Injection Gun for W Band Gyro-TWT

回旋行波管是大功率、高频率的微波毫米波器件。根据W波段回旋行波管的要求,设计了双阳级磁控注入电子枪。由电子光学理论,计算得到电子枪的初始参量,然后利用粒子模拟软件MAGIC构造电子枪模型,分析电子枪各个参数对电子注性能的影响,为电子枪设计优化提供了一定的依据。最后优化得到符合设计要求的低速度零散电子枪结构。电子枪阳极电压为70kV,电流10A,电子注速比1.07,电子注横向速度零散0.8%。

The Gyro-TWTs is the high power and high frequency millimeter wave amylifier. A double anode magnetron injection gun（MIG） is designed according to the requirement of 94GHz gyrotron traveling wave tube（Gyro-TWT）. Firstly, from the electronic optics theory the parameters of gun structure are calculated. Secondly, by the PIC code MAGIC the model of MIG is simulated the structure of gun is optimized. Finally, the design achieve the low velocity spread beam, the gun is operated in 70kV, 10A, and the beam velocity ratio is 1.07, the transverse velocity spread is 0.8%, which can satisfy the requirement of Gyro-TWT.