Experimental CARM operation at 150 Hz PRF

Book · Sun Dec 31 04:00:00 EST 1995

OSTI ID:182748

Cooke, S J; He, W; Cross, A W; Phelps, A D.R. ^[1]

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1. Univ. of Strathclyde, Glasgow (United Kingdom). Dept. of Physics and Applied Physics

Successful operation of the Cyclotron Autoresonance Maser experiment at Strathclyde University has been achieved at a pulse repetition frequency (PRF) of 150 Hz. Microwave pulse measurements are presented demonstrating second harmonic operation in a TE{sub 21} cylindrical mode, in agreement with numerical predictions. Measurements of the power and oscillation frequency at 14.2 GHz, and of the radial and azimuthal far-field mode patterns are described. A stacked Blumlein pulsed voltage source provided repetitive 300kV, 100ns electron pulses from a velvet cathode. CARM oscillation was achieved in a cavity magnetic field of 0.21 Tesla, with a Doppler frequency upshift of 6.8 GHz from the 2nd harmonic of the cyclotron frequency. A self-consistent numerical model of electron beam trajectories, developed at Strathclyde, was used to predict device parameters in the design of the axial-beam electron source, helical-beam kicker and Bragg interaction cavity. Numerical calculations of electron beam parameters are presented, showing close agreement with electron beam and microwave diagnostic measurements.

• OSTI ID: 182748
• Report Number(s): CONF-950612--; ISBN 0-7803-2669-5
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
DIAGNOSTIC TECHNIQUES
HARMONIC GENERATION
MASERS
MATHEMATICAL MODELS
OPERATION
OSCILLATION MODES
THEORETICAL DATA