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Title: Narrow-band microwave generation from an oscillating virtual cathode in a resonant cavity

Abstract

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.

Authors:
; ;
Publication Date:
Research Org.:
Accelerator Technology Division, Los Alamos National Laboratory, MS-H851, Los Alamos, New Mexico 87545
OSTI Identifier:
6613699
Resource Type:
Journal Article
Journal Name:
J. Appl. Phys.; (United States)
Additional Journal Information:
Journal Volume: 65:3
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; CAVITY RESONATORS; MICROWAVE RADIATION; POWER; MICROWAVE TUBES; FABRICATION; CATHODES; ELECTRON BEAMS; RESONATORS; WAVEGUIDES; BEAMS; ELECTRODES; ELECTROMAGNETIC RADIATION; ELECTRON TUBES; ELECTRONIC EQUIPMENT; EQUIPMENT; LEPTON BEAMS; MICROWAVE EQUIPMENT; PARTICLE BEAMS; RADIATIONS; 420800* - Engineering- Electronic Circuits & Devices- (-1989)

Citation Formats

Fazio, M V, Hoeberling, R F, and Kinross-Wright, J. Narrow-band microwave generation from an oscillating virtual cathode in a resonant cavity. United States: N. p., 1989. Web. doi:10.1063/1.343028.
Fazio, M V, Hoeberling, R F, & Kinross-Wright, J. Narrow-band microwave generation from an oscillating virtual cathode in a resonant cavity. United States. https://doi.org/10.1063/1.343028
Fazio, M V, Hoeberling, R F, and Kinross-Wright, J. Wed . "Narrow-band microwave generation from an oscillating virtual cathode in a resonant cavity". United States. https://doi.org/10.1063/1.343028.
@article{osti_6613699,
title = {Narrow-band microwave generation from an oscillating virtual cathode in a resonant cavity},
author = {Fazio, M V and Hoeberling, R F and Kinross-Wright, J},
abstractNote = {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.},
doi = {10.1063/1.343028},
url = {https://www.osti.gov/biblio/6613699}, journal = {J. Appl. Phys.; (United States)},
number = ,
volume = 65:3,
place = {United States},
year = {1989},
month = {2}
}