为此，人们采用各种类型的激光驱动光电阴极、一些热阴极和场致发射阴极作为电子源。
For this purpose, several kinds of laser-driven photocathodes, and some thermionic cathodes and field emission cathodes are applied.
为此，人们采用各种类型的激光驱动光电阴极、一些热阴极和场致发射阴极作为电子源。
For this purpose, several kinds of laser-driven photocathodes, and some thermionic cathodes and field emission cathodes are applied.
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