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Proceedings Paper

Investigation of lower-order mode suppression in a high-current high-voltage gyro-BWO experiment
Author(s): Thomas A. Spencer; Mark D. Stump; Kyle J. Hendricks; Ronald M. Gilgenbach
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Paper Abstract

The Air Force Phillips Laboratory Gyro-BWO experiment is utilizing the RAMBO pulse, with electron beam parameters of: VD equals 300 - 800 kV; ID equals 1.50 kA; pulselength equals 1 - 3 microsecond(s) . An annular electron beam of approximately 1 - 3 kA is produced by an annular aluminum cathode. The interaction cavity is designed to radiate in the frequency range of 4.2 - 5.5 GHz in a TE01 mode. The interaction cavity has a radius of 4.37 cm and a length of 15 cm. Diode and interaction magnetic fields are used together to provide a magnetic compression of the electron beam. C-Band bevel- cut antennas located at the diode end of the experiment are used to extract the backward wave. Experiments have shown evidence of mode competition existing as two different frequency values appearing at the same time. A helical slotted cavity has been designed, in an effort to suppress the TEnl modes, n not equal to 0. Analysis and numerical simulations from the 3D code HFSS will be presented, as well as the latest experimental results.

Paper Details

Date Published: 28 October 1996
PDF: 6 pages
Proc. SPIE 2843, Intense Microwave Pulses IV, (28 October 1996); doi: 10.1117/12.255398
Show Author Affiliations
Thomas A. Spencer, Air Force Phillips Lab. (United States)
Mark D. Stump, Air Force Phillips Lab. (United States)
Kyle J. Hendricks, Air Force Phillips Lab. (United States)
Ronald M. Gilgenbach, Univ. of Michigan (United States)

Published in SPIE Proceedings Vol. 2843:
Intense Microwave Pulses IV
Howard E. Brandt, Editor(s)

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