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Proceedings Paper

PASOTRON amplifier experiments
Author(s): Elmira S. Ponti; Dan M. Goebel; Jon R. Feicht; Joseph Santoru; Robert L. Eisenhart
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Paper Abstract

Preliminary experimental studies are reported of an L-band amplifier based on Hughes' plasma-assisted, slow-wave oscillator (PASOTRON) technology. The amplifier system utilizes a hollow-cathode-plasma electron-gun, and a plasma-filled slow-wave structure (SWS) to produce >= 100 microsecond(s) ec-long, 50 to 75 kV, 30 to 100-A electron beam pulses that propagate in a plasma channel without the use of any externally applied axial magnetic field. The electron-beam pulse coincides with a 100-microsecond(s) ec-long RF drive signal provided by a 2.6-kW TWT, which is coupled into the amplifier upstream of the SWS. The SWS consists of a ring-bar design which is novel to the PASOTRON family of devices and is used for its short length compared to a helix. Simulations of HP's high frequency structure simulator were used to optimize the ring-bar SWS. Preliminary data are reported showing the new L-band amplifier's gain, power, efficiency, and bandwidth. Methods of eliminating a backward wave oscillation, which was found to limit the performance of the tube, are also presented.

Paper Details

Date Published: 8 September 1995
PDF: 8 pages
Proc. SPIE 2557, Intense Microwave Pulses III, (8 September 1995);
Show Author Affiliations
Elmira S. Ponti, Hughes Research Labs. (United States)
Dan M. Goebel, Hughes Research Labs. (United States)
Jon R. Feicht, Hughes Research Labs. (United States)
Joseph Santoru, Hughes Research Labs. (United States)
Robert L. Eisenhart, Consultant (United States)

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

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