Observation of high-power millimeter wave emission from a virtual cathode

Conference · Tue Jan 01 04:00:00 EST 1985

OSTI ID:5030340

Davis, H A; Bartsch, R R; Sherwood, E G; Stringfield, R M; Thode, L E

Intense bursts of mm wave power have been observed in microwave generation experiments with a relativistic electron beam (REB) virtual cathode oscillator. In this device an electron beam is injected into a drift space at a current above the space-charge-limit, and a potential develops downstream which is large enough to reflect electrons back to the source region. Two mechanisms can give rise to microwave oscillations in a virtual cathode device: electrons reflexing between the real and virtual cathodes, and oscillations in the amplitude and position of the virtual cathode. Typically both mechanisms are present, but in the present experiments reflexing has been shown to be dominant.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5030340
• Report Number(s): LA-UR-85-3452; CONF-851238-1; ON: DE86000799
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
BEAMS
CATHODES
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRONIC EQUIPMENT
ENERGY RANGE
EQUIPMENT
LEPTON BEAMS
MICROWAVE RADIATION
OSCILLATIONS
OSCILLATORS
PARTICLE BEAMS
POWER RANGE 10-100 MW
RADIATIONS
RELATIVISTIC RANGE