Theory of phase-locked gyrotrons operating at cyclotron harmonics

Journal Article · Sat Oct 01 04:00:00 EDT 1994 · IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/27.338297· OSTI ID:6797504

Latham, P E; Levush, B; Nusinovich, G S; Parikh, S ^[1]

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

The theory of phase-locked gyrotrons operating at cyclotron harmonics is developed, with particular attention given to the effects of electron velocity spread. Extensive studies are made for operation at the second harmonic in which phase locking is achieved by subharmonic prebunching. One result of these studies is that the authors are able to predict, for a range of velocity spreads, the parameters that yield the highest efficiency. More important, they find that for electron beams with velocity spread and a finite transit angle in the drift region, the bandwidth of stable operation is drastically reduced. This effect can be mitigated by properly tapering the external magnetic field there. Such tapering is necessary in devices where the bandwidth is required to be a reasonable fraction of 1/Q.

• OSTI ID: 6797504
• 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
BEAM BUNCHING
BEAM DYNAMICS
ELECTRONIC EQUIPMENT
EQUIPMENT
MATHEMATICAL MODELS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
OPERATION
PERFORMANCE