... 聚焦线圈轴 focus coil axis 聚焦阳极 focusing anode 聚群电压 bunching voltage ...
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focusing g anode 聚焦阳极
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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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