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公开(公告)号:US5329129A
公开(公告)日:1994-07-12
申请号:US849238
申请日:1992-03-10
IPC分类号: H01J37/02 , H01J37/317 , H01J37/04
CPC分类号: H01J37/026 , H01J37/3171 , H01J2237/0045
摘要: There is disclosed an electron shower apparatus which eliminates the adverse effect of a magnetic field on electrons and which provides electrons in sufficient quantity when primary electrons having low energy are employed. In the apparatus, the magnetic field generated by a filament current is decreased or eliminated by pulsing the filament current or by passing a current opposite in direction to the filament current in the vicinity of the filament current.
摘要翻译: 公开了一种电子喷淋装置,其消除了磁场对电子的不利影响,并且当使用具有低能量的一次电子时,其提供足够量的电子。 在该装置中,由灯丝电流产生的磁场通过脉冲灯丝电流或通过在灯丝电流附近通过与灯丝电流相反的方向的电流来减小或消除。