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Proceedings Paper

Effects of tapered magnetic fields and structures on long-pulse gyrotron backward-wave oscillator performance
Author(s): Ronald M. Gilgenbach; M. T. Walter; Jonathan M. Hochman; John W. Luginsland; J. I. Rintamaki; Reginald L. Jaynes; Yue Ying Lau; Thomas A. Spencer
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Paper Abstract

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 microsecond(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.

Paper Details

Date Published: 8 September 1995
PDF: 10 pages
Proc. SPIE 2557, Intense Microwave Pulses III, (8 September 1995); doi: 10.1117/12.218569
Show Author Affiliations
Ronald M. Gilgenbach, Univ. of Michigan (United States)
M. T. Walter, Univ. of Michigan (United States)
Jonathan M. Hochman, Univ. of Michigan (United States)
John W. Luginsland, Univ. of Michigan (United States)
J. I. Rintamaki, Univ. of Michigan (United States)
Reginald L. Jaynes, Univ. of Michigan (United States)
Yue Ying Lau, Univ. of Michigan (United States)
Thomas A. Spencer, Air Force Phillips Lab. (United States)

Published in SPIE Proceedings Vol. 2557:
Intense Microwave Pulses III
Howard E. Brandt, Editor(s)

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