Microwave electron gun

Details Microwave electron gun Microwave electron gun

1984-07-19

1987-02-03

Chatmon, Saxfield

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Plural load device systems

315 529, 315 541, 250294, 250305, 328230, 328233, H01J 2954, H01J 2958, H01J 2980, H01J 2984

Patent

active

046411038

ABSTRACT:
An electron gun (10) that suppresses the non-linear space charge forces and phase-dependant focusing forces that are chiefly responsible for the high emittance of conventional electron guns. The gun comprises a resonant microwave cavity (15), a cathode (12) mounted in the cavity wall, and a momentum analyzer system (17). The resonant microwave cavity, when supplied with microwave power, supports an electromagnetic field having a high-gradient electric component directed along an acceleration axis. The cavity is formed with an exit aperture (32) at a location relative to the cathode such that emitted electrons are accelerated along the axis and pass through the exit aperture. The cavity length is chosen to allow the microwave field within the cavity volume to accelerate the electrons to an energy of about 0.5-1.0 MeV prior to the electrons' passing through the aperture. Bunching is provided by the momentum analyzer. An electron emerging from the cavity has an energy determined by the phase of the microwave field at the time of that electron's emission. Those electrons having energies corresponding to the desired initial phase value are permitted to pass through the momentum analyzer, thereby forming a prebunched electron beam for injection into a linear accelerator.

REFERENCES:
patent: 2857480 (1958-10-01), Mihran et al.
patent: 3091719 (1963-05-01), Dyke et al.
patent: 3454818 (1969-07-01), Soffer et al.
patent: 3571642 (1971-03-01), Westcott
patent: 3916239 (1975-10-01), Friedlander
patent: 4004181 (1977-01-01), Kervizic et al.
patent: 4090076 (1978-05-01), Humziker et al.
patent: 4243916 (1981-01-01), Leboutet et al.
patent: 4284923 (1981-08-01), Pottier
patent: 4329654 (1982-05-01), Chamberlain
patent: 4346325 (1982-08-01), Nakasuji et al.
patent: 4412131 (1983-10-01), Froitzheim
patent: 4414487 (1983-11-01), Yamashita et al.
patent: 4420570 (1984-02-01), Takigawa et al.
patent: 4489237 (1984-12-01), Litherland et al.
patent: 4527091 (1985-07-01), Preist
"The Microtron"--S. P. Kapitza et al, Physics Laboratory of the Institute for Physical Problems, Acad. Sciences USSR, Harwood Academic Pub., London-Chur 1978.

Affiliated with

Also associated with

Rating

Microwave electron gun does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Microwave electron gun, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microwave electron gun will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1093037