Starting oscillation conditions for gyrotron backward wave oscillators

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Physics of Plasmas; (United States)

DOI:https://doi.org/10.1063/1.870500· OSTI ID:6708881

Kou, C S ^[1]

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1. Department of Physics, National Tsing Hua University, Hsinchu, Taiwan (Taiwan, Province of China)

A generalized linear theory that allows for mismatched boundary conditions was used in determining the starting oscillation conditions for gyrotron backward wave oscillators (gyro-BWO). The results reveal that the gyro-BWO interaction is normally caused by the interference between a constant-amplitude backward wave and a decaying backward wave. The latter becomes a forward-growing wave if the operating frequency is close to the waveguide cutoff frequency. The starting oscillation length for a reflection-type gyro-BWO is shorter than that of a matched-type gyro-BWO. The mismatch has more of an effect upon the onset of a gyro-BWO, which is operated close to the cutoff frequency.

• OSTI ID: 6708881
• Journal Information: Physics of Plasmas; (United States), Journal Name: Physics of Plasmas; (United States) Vol. 1:9; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426000* -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
BACKWARD WAVE TUBES
BEAMS
BOUNDARY CONDITIONS
COHERENT RADIATION
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
LEPTON BEAMS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
OSCILLATIONS
PARTICLE BEAMS
RADIATIONS
WAVEGUIDES