High power operation of the university of Maryland coaxial gyroklystron experiment

Journal Article · Thu Jul 01 04:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.58842· OSTI ID:687930

Lawson, W; Arjona, M; Castle, M; Hogan, B; Granatstein, V; Reiser, M ^[1]

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1. Institute for Plasma Research and Electrical Engineering Department, University of Maryland, College Park, Maryland 20742 (United States)

We report the experimental studies of high power amplification in a coaxial three-cavity X-band gyroklystron. A single-anode magnetron injection gun (MIG) is used to produce a 520 A beam of 470 keV electrons with an average ratio of perpendicular-to-parallel velocity of about one. The voltage flat top is nearly 2 {mu}s. All cavities are designed to operate in the TE{sub 011} coaxial mode near 8.6 GHz. The input cavity is driven by a 150 kW, 3 {mu}s coaxial magnetron through a single slot in the radial wall. Peak powers of 75{endash}85 MW are measured with a conversion efficiency of nearly 32{percent} and a large signal gain of about 30 dB. This performance is in good agreement with simulations and represents approximately a tri-fold increase in the peak power capability of pulsed X-band gyroklystrons. We also report on the design of a three cavity second harmonic gyroklystron which is expected to produce 100 MW at 17.14 GHz. We close with a general discussion of scaling our designs to higher frequencies. {copyright} {ital 1999 American Institute of Physics.}

• Sponsoring Organization: USDOE
• OSTI ID: 687930
• Report Number(s): CONF-980742--
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 472; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
BEAM BUNCHING
ELECTRON BEAMS
ELECTRON SOURCES
KLYSTRONS
LINEAR ACCELERATORS
MICROWAVE AMPLIFIERS
RF SYSTEMS