To have enough emitting current and improve focusing, advance a opinion, which is using focusing node and heightening the extracting voltage of anode.
从束流参数的要求出发，提出了采用阴极聚束鼻锥结构和提高阳极引出电压，以确保束流发射和改善聚焦；
To have enough emitting current and improve focusing, advance a opinion, which is using focusing node and heightening the extracting voltage of anode.
从束流参数的要求出发，提出了采用阴极聚束鼻锥结构和提高阳极引出电压，以确保束流发射和改善聚焦；
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