Starting energy and current for a large diameter backward wave oscillator
- Niigata Univ. (Japan). Graduate School of Science and Technology
- National Inst. for Fusion Science, Nagoya (Japan)
- Univ. of Maryland, College Park, MD (United States). Inst. for Plasma Research
Among various high-power microwave sources, multiwave Cerenkov Generators (MWCGs) have attained top data of output. Radiation powers 3 GW at wave length 9.7 mm and efficiency 20% were reported. Here a large mean diameter D of the slow wave structure (SWS) is the key point. Although the physical processes involved in the MWCGs are complicated, the authors here design a large diameter backward wave oscillator (LD-BWO) operating at 24 GHz high-power microwaves without decreasing D. The inner radius of the metal surface of the SWS is assumed to vary sinusoidally. The oscillation frequency is raised by choosing carefully small values of z{sub 0} and h. Numerical study is made within the scope of linear pinch point analysis for a SWS available in 24 GHz LD-BWO. The authors find that there exists a starting energy in addition to starting current in electron beam for initiating microwave oscillation, if the finite length L of SWS is taken into account.
- OSTI ID:
- 51776
- Report Number(s):
- CONF-940604-; ISBN 0-7803-2006-9; TRN: IM9524%%244
- Resource Relation:
- Conference: 1994 Institute of Electrical and Electronic Engineers (IEEE) international conference on plasma science, Santa Fe, NM (United States), 6-8 Jun 1994; Other Information: PBD: 1994; Related Information: Is Part Of IEEE conference record -- Abstracts; PB: 252 p.
- Country of Publication:
- United States
- Language:
- English
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