Title :
High-power dielectric Cherenkov maser oscillator
Author :
Main, William ; Cherry, Randall ; Garate, Eusebio
Author_Institution :
Lab. for Plasma Res., Maryland Univ., College Park, MD, USA
fDate :
6/1/1990 12:00:00 AM
Abstract :
Results are presented of experiments conducted using the dielectric Cherenkov maser (DCM) oscillator. The device consists of a cylindrical metallic waveguide with an inner radius of 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 ε=10, 5, and 2.3 were investigated for liner thicknesses of 4 and 6 mm. The 6-mm-thick, ε=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 (ε=5), with several megawatts of power output from the polyethylene liner (ε=2.3) at a frequency of ~9 GHz
Keywords :
Cherenkov radiation; dielectric-loaded waveguides; masers; microwave generation; microwave oscillators; relativistic electron beam tubes; 100 ns; 12 kA; 20 ns; 200 MW; 3.64 cm; 3.8 Hz; 4 mm; 6 mm; 7 GHz; 700 kV; 80 MW; 9 GHz; annular relativistic electron beam; cylindrical metallic waveguide; dielectric Cherenkov maser oscillator; dielectric liner; Dielectric constant; Dielectric devices; Dielectric measurements; Electron beams; Masers; Oscillators; Power measurement; Pulse generation; Radio frequency; Waveguide components;
Journal_Title :
Plasma Science, IEEE Transactions on
