To select a cylindrical plane cathode ; to design proper focus electrodes in order to control the formation of beam in methods of solving equations , electrobath and simulation aided by computer . to correct effects of anode hole and work out curves of designing guns ; to discuss plasma cathode guns at last 选用圆形平面阴极;设计恰当的聚束极形状以控制电子束的成形,并使用解析法、电解槽法和数值方法三种方法进行设计;考虑阳孔效应对电子束传输的影响,修正阳孔效应,给出电子枪设计曲线;最后讨论一下等离子体阴极电子枪。
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