High-power dielectric Cherenkov maser oscillator experiments

Journal Article · Fri Jun 01 00:00:00 EDT 1990 · IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (USA)

DOI:https://doi.org/10.1109/27.55921· OSTI ID:6447642

Main, W ^[1]; Cherry, R ^[2]; Garate, E ^[3]

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1. Maryland Univ., College Park, MD (USA). Lab. for Plasma Research
2. Dept. of Geology, Univ. of Colorado, Boulder, CO (US)
3. Beam Plasma Lab., Univ. of California, Irvine, CA (US)

This paper presents the results of a series of experiments conducted on the dielectric Cherenkov maser (DCM) oscillator. The device consists of a cylindrical metallic waveguide of inner radius 3.64 cm which is partially filled with a dielectric liner. Traveling through the lined waveguide is an annular relativistic electron beam. Liners of dielectric constant {epsilon} = 10, 5 and 2.3 were investigated for liner thicknesses of 4 and 6 mm. The 6-mm-thick, {epsilon} = 10 liner generated an RF output of 200 MW for 20 ns at 3.8 Hz with electron-beam parameters of 700 kV, 12 kA, and pulse duration of 100 ns. The maximum measured power output for the other configurations was 80 MW at a frequency of 7 GHz ({epsilon} = 5), with several MW of power output from the polyethylene liner ({epsilon} = 2.3) at a frequency of {approximately} 9 GHz.

• OSTI ID: 6447642
• Journal Information: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (USA) Vol. 18:3; ISSN ITPSB; ISSN 0093-3813
• Country of Publication: United States
• Language: English

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFICATION
AMPLIFIERS
BEAM INJECTION
BEAMS
CHERENKOV RADIATION
DATA
DIELECTRIC PROPERTIES
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRON BEAMS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
GAIN
INFORMATION
LEPTON BEAMS
LINERS
MASERS
MEASURING METHODS
MICROWAVE AMPLIFIERS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
NUMERICAL DATA
OSCILLATORS
PARAMETRIC ANALYSIS
PARTICLE BEAMS
PHYSICAL PROPERTIES
RADIATIONS
RELATIVISTIC BEAM INJECTION
TRAVELLING WAVE TUBES
WAVE PROPAGATION