Stably emitting demountable photoelectron generator

Details Stably emitting demountable photoelectron generator Stably emitting demountable photoelectron generator

1990-01-17

1990-11-13

Berman, Jack I.

Radiant energy

Ion generation

Field ionization type

250424, 2504922, 313542, H01J 2702, H01J 4020

Patent

active

049703927

ABSTRACT:
A new method and apparatus for providing a stable, temporally controllable high current density electron beam from a photocathode has been developed. A low level of cesium and, possibly a stabilizing gas, is supplied to the photoemitting surface while the electron beam is being generated, thereby replenishing cesium and possibly other ions lost from the emitting surface on a continual basis.

REFERENCES:
patent: 4460831 (1984-07-01), Oettinger et al.
patent: 4820927 (1989-04-01), Langner et al.
Pierce et al., Rev. of Scientific Instruments 51(4), Apr. 1980, pp. 478-499.

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