35 GHz gyroklystron amplifier development at NRL

Conference · Mon Dec 30 23:00:00 EST 1996

OSTI ID:435466

Choi, J J ^[1]; Ganguly, A K ^[2]; Blank, M ^[3]

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1. Science Applications International Corp., McLean, VA (United States)
2. Omega-P, Inc., New Haven, CT (United States)
3. Naval Research Lab., Washington, DC (United States). Vacuum Electronics Branch; and others

Experiments on a two-cavity gyroklystron are underway to demonstrate a 140 kW, 35 GHz gyroklystron amplifier, operating at a fundamental beam cyclotron mode and a TE{sub 011} cylindrical cavity mode. A high power electron beam of 70 kV, 6.6A is produced from a magnetron-injection-gun which is optimally designed for the TE{sub 01} mode at 35 GHz. Drift tubes consisting of lossy ceramic rings (80% BeO, 20% SiC) are designed to suppress undesired oscillations. A drive power is injected into the first cavity through a multi-hole coaxial coupler. A capacitive probe is placed directly before the input cavity to measure the beam velocity ratio. Large signal nonlinear calculations predict a peak efficiency of 30% (extracted power = 140 kW) and a saturated gain of 20dB over a 0.3% bandwidth at {alpha} = 1.5, {Delta}v{sub z}/v{sub z} = 20% at 13.3 kG and Q{sub 1} = Q{sub 2} = 200. Design parameters and initial hot-test results of the amplifier will be presented.

• Sponsoring Organization: Office of Naval Research, Washington, DC (United States)
• OSTI ID: 435466
• Report Number(s): CONF-960634--
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DESIGN
ELECTRON GUNS
GHZ RANGE 01-100
MICROWAVE AMPLIFIERS
NAVAL RESEARCH LABORATORY
OPERATION
OSCILLATION MODES
PERFORMANCE