设计了用于 G波段行波管的聚焦极调制皮尔斯电子枪, 电子注电压 20 kV, 电流50.9 mA, 注腰半径 0.056 mm, 射程 10.3 mm。利用热-结构耦合分析和电子注轨迹仿真方法, 分析了热形变对电子枪性能造成的显著影响。为了消除电子枪热形变的影响, 设计了装配模具进行补偿, 并得到了实验验证。该电子枪已用于多种 G波段行波管, 解决了关键部件技术问题。

A focus electrode modulation Pierce gun for G band traveling wave tube is designed, with a beam voltage of 20 kV, current of 50 mA, waist radius of 0.056 mm, and a waist position of 10.3 mm. The impact of thermal deformation on the performance of the electron gun is analyzed by using thermal-structure coupling analysis and electron beam trajectory simulation method. In order to eliminate the influence of thermal deformation, an assembly fixer for compensation is designed and verified by experiments. The electron gun has been applied in a variety of G band traveling wave tube, and has solved technical problems of the key component.