Narrow-band microwave generation from an oscillating virtual cathode in a resonant cavity
An experimental approach using a high Q, resonant cavity surrounding an oscillating virtual cathode has achieved frequency stabilization, and repeatable narrow-band operation of the virtual cathode microwave source. A cylindrical cavity resonator is used with the microwave power being extracted radially through circumferential slot apertures into dominant-mode L-band waveguide. The electron-beam/cavity interaction produces strong feedback between the induced cavity field and the oscillating virtual cathode, forcing it to lock to the resonant frequency of a cavity mode over a large variation in electron beam current. The 3-dB frequency bandwidth observed during single 100-ns pulses is less than 1%. The 3-dB bandwidth appears to be limited by the finite temporal width of the microwave pulse.
- Research Organization:
- Accelerator Technology Division, Los Alamos National Laboratory, MS-H851, Los Alamos, New Mexico 87545
- OSTI ID:
- 6613699
- Journal Information:
- J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 65:3; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
420800* -- Engineering-- Electronic Circuits & Devices-- (-1989)
BEAMS
CATHODES
CAVITY RESONATORS
ELECTRODES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
FABRICATION
LEPTON BEAMS
MICROWAVE EQUIPMENT
MICROWAVE RADIATION
MICROWAVE TUBES
PARTICLE BEAMS
POWER
RADIATIONS
RESONATORS
WAVEGUIDES