RF electron gun with cathode activating device

Details RF electron gun with cathode activating device RF electron gun with cathode activating device

1991-02-14

1992-03-17

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Discharge device load with fluent material supply to the...

Electron or ion source

313337, 313346R, 313310, 313446, 445 2, 445 6, H01J 724, H01J 1914, H01J 950, H05B 3126

Patent

active

050971786

ABSTRACT:
A RF electron gun, such as for use in a linear electron accelerator, having a cathode activating device which, in one embodiment, includes means for altering the phase of the accelerating electric field to accelerate emitted electrons in the reverse direction to cause them to strike the cathode, thereby activating the cathode. In another embodiment, laser light is directed onto the cathode for activation thereof and, in a further embodiment, the electric field is positioned and directed at the cathode to cause the activation thereof.

REFERENCES:
patent: 2284751 (1942-06-01), Linder
patent: 3745342 (1973-07-01), LePoole
patent: 4115720 (1978-09-01), Levine
patent: 4641103 (1987-02-01), Madey et al.
patent: 4978893 (1990-12-01), Brannon et al.

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