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Title: High-power microwave source based on an unmagnetized backward-wave oscillator

Abstract

A unique, high-power microwave source, called PASOTRON[trademark] (Plasma-Assisted Slow-wave Oscillator), has been developed. The PASOTRON utilizes a long-pulse E-gun and plasma-filled slow-wave structure (SWS) to produce high-energy microwave pulses from a simple, lightweight device that utilizes no externally-produced magnetic fields. The novel E-gun employs a low-pressure glow discharge to provide a stable, high current-density electron source. A high-perveance, multi-aperture electron accelerator produces an E-beam that is operated in the ion-focused regime; where the beam-produced plasma filling the SWS space-charge neutralizes the beam, and the self-pinch force compresses the beamlets to provide propagation through the SWS. The PASOTRON E-gun has produced beams with voltages of up to 220 kV and currents in excess of 1 kA for pulse lengths of over 100 [mu]sec. The PASOTRON HPM source normally operates in the TM[sub 01] mode, and a unique mode converter has been developed to efficiently produce a TE[sub 11] output mode with fixed polarization. The PASOTRON also has the ability to directly produce TE-mode radiation with a rotating output polarization. PASOTRON HPM sources have operated in L, S, C and X-bands, and have produced output powers in the 1 to 5 MW range in C-band at about 20% efficiency with pulse lengthsmore » of over 100 [mu]sec.« less

Authors:
; ; ;  [1];  [2]
  1. Hughes Research Labs., Malibu, CA (United States)
  2. Hughes Missile Systems Group, Canoga Park, CA (United States)
Publication Date:
OSTI Identifier:
6625927
Resource Type:
Journal Article
Journal Name:
IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States)
Additional Journal Information:
Journal Volume: 22:5; Journal ID: ISSN 0093-3813
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; BACKWARD WAVE TUBES; DESIGN; BEAM NEUTRALIZATION; BEAM TRANSPORT; ELECTRON GUNS; OSCILLATION MODES; PERFORMANCE; PLASMA PRODUCTION; ELECTRON TUBES; ELECTRONIC EQUIPMENT; EQUIPMENT; MICROWAVE EQUIPMENT; MICROWAVE TUBES; 426000* - Engineering- Components, Electron Devices & Circuits- (1990-)

Citation Formats

Goebel, D M, Butler, J M, Schumacher, R W, Santoru, J, and Eisenhart, R L. High-power microwave source based on an unmagnetized backward-wave oscillator. United States: N. p., 1994. Web. doi:10.1109/27.338267.
Goebel, D M, Butler, J M, Schumacher, R W, Santoru, J, & Eisenhart, R L. High-power microwave source based on an unmagnetized backward-wave oscillator. United States. doi:10.1109/27.338267.
Goebel, D M, Butler, J M, Schumacher, R W, Santoru, J, and Eisenhart, R L. Sat . "High-power microwave source based on an unmagnetized backward-wave oscillator". United States. doi:10.1109/27.338267.
@article{osti_6625927,
title = {High-power microwave source based on an unmagnetized backward-wave oscillator},
author = {Goebel, D M and Butler, J M and Schumacher, R W and Santoru, J and Eisenhart, R L},
abstractNote = {A unique, high-power microwave source, called PASOTRON[trademark] (Plasma-Assisted Slow-wave Oscillator), has been developed. The PASOTRON utilizes a long-pulse E-gun and plasma-filled slow-wave structure (SWS) to produce high-energy microwave pulses from a simple, lightweight device that utilizes no externally-produced magnetic fields. The novel E-gun employs a low-pressure glow discharge to provide a stable, high current-density electron source. A high-perveance, multi-aperture electron accelerator produces an E-beam that is operated in the ion-focused regime; where the beam-produced plasma filling the SWS space-charge neutralizes the beam, and the self-pinch force compresses the beamlets to provide propagation through the SWS. The PASOTRON E-gun has produced beams with voltages of up to 220 kV and currents in excess of 1 kA for pulse lengths of over 100 [mu]sec. The PASOTRON HPM source normally operates in the TM[sub 01] mode, and a unique mode converter has been developed to efficiently produce a TE[sub 11] output mode with fixed polarization. The PASOTRON also has the ability to directly produce TE-mode radiation with a rotating output polarization. PASOTRON HPM sources have operated in L, S, C and X-bands, and have produced output powers in the 1 to 5 MW range in C-band at about 20% efficiency with pulse lengths of over 100 [mu]sec.},
doi = {10.1109/27.338267},
journal = {IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States)},
issn = {0093-3813},
number = ,
volume = 22:5,
place = {United States},
year = {1994},
month = {10}
}