中文摘要：

电子枪是超高真空电子器件，可用于各类加速器的束流源与功率源中，是加速器与微波电子管的主要与关键部件之一。结合某辐照加速器电子枪实际需要，对其束流光学系统进行了计算机模拟和优化设计。模拟结果表明该电子枪在80kV高压下工作时，输出电流可以达到5A以上，束流发射度、枪区电场以及束腰半径可以满足该加速器运行的需要。电子枪现已完成前期的制作加工，并安装于测试台，近期将对其进行老炼与测试。

英文摘要：

Electron gun, the source of electrons, is a kind of ultrahigh vacuum device and plays an important role in different kind of accelerators. With the irradiation accelerator demands, decribes the design studies on beam optics opitimization. The simulation result shows that the beam current is above 5 A with cathode voltage of 80 kV and beam emittance, gun electric field and beam waist radius meet the accelerator needs. The electron gun manufactured and installed in the test stand, the conditioning and test will be done in the near future.