Electron gun with electron beam modulated by an optical device

Electric lamp and discharge devices: systems – Cathode ray tube circuits – Combined cathode ray tube and circuit element structure

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H01J 2502

Patent

active

050436309

ABSTRACT:
The device according to the invention comprises a photocathode (1) illuminated by a luminous source (11) modulated at a high frequency F by an optical device (15) controlled at the frequency F, the optical device (15) being interposed between the luminous source and the photocathode. According to one aspect of the invention, the optical modulator (15) is controlled by a surrounding electromagnetic field at a high frequency F, in which the modulator is immersed. The electron gun device according to another aspect of the invention can be associated to a microwave circuit to obtain microwave oscillator or amplifier tubes. According to another aspect of the invention, the device supplies a pulsed electron beam for injection into particle accelerators.

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patent: 4703228 (1987-10-01), West
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patent: 4763996 (1988-08-01), Hara et al.
International Electron Devices Meeting, Washington, D.C., Dec. 1-4, 1985, pp. 342-345, M. Shrader et al., "Pre-Bunched Beam Devices--Efficient Sources of UHF and Microwave Power".
The Microwave Journal, vol. 7, No. 8, Aug. 1964, pp. 51-56, Horizon House, Dedham, U.S., K. M. Johnson, "Microwave Light Modulation by the Pockel Effect".
IEEE Transactions on Nuclear Science, vol. NS-32, No. 5, part 2, New York, U.S.A., Oct. 1985, pp. 2906-2908, E. L. Garwin et al., "An Experimental Program to Build a Multimegawatt Lasertron for Super Linear Colliders".

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