Device for generating an on-off modulation electron beam

Details Device for generating an on-off modulation electron beam Device for generating an on-off modulation electron beam

1991-11-26

1992-12-29

Issing, Gregory C.

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Plural concentrating, accelerating, and/or de-accelerating...

315384, H01J 2946, G09G 104

Patent

active

051754681

ABSTRACT:
An electron gun and a high tension switch permits the achievement of high-power electron beams which are ON-OFF modulated by DC up to frequencies exceeding kHz. The electron gun has a cathode, at least two accelerating electrodes, a cathode heater, and a possible focussing system. The or each accelerating voltage, generated by any source, which may in the case of space applications also be a tether, is applied between accelerating electrodes and cathode, with the exception of an appropriate accelerating electrode to which there is applied, by of the switch, alternately its accelerating voltage or the same voltage as that of the cathode, obtaining an ON-OFF modulation of the electron beam emitted by the gun.

REFERENCES:
patent: 3300735 (1967-01-01), Badger
patent: 3409798 (1968-11-01), McCann
Banks et al., "VCAP Experiments on STS-3," pp. 1-29.

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