Effects of tapered magnetic fields and structures on long-pulse, gyrotron-backward-wave-oscillator performance
- Univ. of Michigan, Ann Arbor, MI (United States)
- USAF Phillips Lab., Kirtland AFB, NM (United States)
Results are presented of microwave spectral measurements on a gyrotron-backward-wave-oscillator (gyro-BWO) driven by a long-pulse, relativistic electron beam. The Michigan Electron Long Beam Accelerator (MELBA) generates 800 kV, 1--4 kA, 0.5 {micro}s electron beams from a cold cathode. Gyro-BWO microwave emission has shown high-power fundamental-cyclotron (4.5--5 GHz) emission (peak of {approximately}40--50 MW tube power). Second cyclotron-harmonic gyro-BWO microwave emission spectra are reported here in the frequency range from 5--6 GHz, at lower tube powers (MW range). The effects of tapered magnetic fields with uniform or tapered interaction radii are to broaden the microwave spectrum over the uniform tube/field case.
- OSTI ID:
- 116404
- Report Number(s):
- CONF-950793-; ISBN 0-8194-1916-8; TRN: IM9545%%374
- Resource Relation:
- Conference: 40. annual meeting of the Society of Photo-Optical Instrumentation Engineers, San Diego, CA (United States), 9-14 Jul 1995; Other Information: PBD: 1995; Related Information: Is Part Of Intense microwave pulses III; Brandt, H.E. [ed.] [Army Research Lab., Adelphi, MD (United States)]; PB: 546 p.; Proceedings/SPIE, Volume 2557
- Country of Publication:
- United States
- Language:
- English
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