Efficiency of frequency up-shifted gyrodevices: Cyclotron harmonics versus CARM's

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/27.338295· OSTI ID:6535617

Nusinovich, G S; Latham, P E; Li, H ^[1]

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1. Univ. of Maryland, College Park, MD (United States). Lab. for Plasma Research

For gyrodevices with a given operating frequency and a fixed value of the external magnetic field two kinds of operation are compared: Doppler frequency up-shifted operation at the fundamental cyclotron resonance and cyclotron harmonic operation. When the electron velocity spread is negligibly small the maximum efficiency of the Doppler up-shifted operation exceeds that of harmonic operation. However, as the velocity spread grows the Doppler up-shifted efficiency degrades faster. The relevant quantity when deciding between fundamental, Doppler up-shifted, and harmonic operation turns out to be the velocity spread divided by the square root of the beam current. If this quantity is small, fundamental, Doppler upshifted operation is more efficient than harmonic operation; if it is large harmonic operation is more efficient. The efficiency dependence of both kinds of operation on electron velocity spread is studied. A comparative analysis of designs relevant to the planned University of Maryland experiments with relativistic gyro-amplifiers is done.

• OSTI ID: 6535617
• Journal Information: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States) Vol. 22:5; ISSN ITPSBD; ISSN 0093-3813
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426000* -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
AMPLIFIERS
COMPARATIVE EVALUATIONS
CYCLOTRON HARMONICS
CYCLOTRON RESONANCE
DESIGN
ELECTRONIC EQUIPMENT
EQUIPMENT
EVALUATION
HARMONICS
MASERS
MATHEMATICAL MODELS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OPERATION
OSCILLATIONS
PERFORMANCE
RESONANCE