Title :
Results from gyrotron backward wave oscillator experiments utilizing a high-current high-voltage annular electron beam
Author :
Spencer, Thomas A. ; Davis, Charles E. ; Hendricks, Kyle J. ; Agee, Forrest J. ; Gilgenbach, Ronald M.
Author_Institution :
Air Force Phillips Lab., Kirtland AFB, NM, USA
fDate :
6/1/1996 12:00:00 AM
Abstract :
We report the first gyrotron-backward-wave oscillator experiments which utilize a high-current (1-4 kA) high-voltage (300-500 keV) annular electron beam. The experiment was designed to operate in the TE01 backward wave mode. Radio frequency extracted power was 0.1-4 MW, with pulselengths of 80-500 ns. Experimental results suggest the possibility of competition with the TE21 backward wave mode. Frequency spectrum measurements have shown a wide content of frequencies during the voltage pulse, an undesirable result for use in narrow-band devices
Keywords :
backward wave oscillators; electron beams; gyrotrons; 0.1 to 4 MW; 1 to 4 kA; 300 to 500 keV; TE01 backward wave mode; TE21 backward wave mode; frequency spectrum measurements; gyrotron backward wave oscillator experiments; high-current high-voltage annular electron beam; narrow-band devices; radio frequency extracted power; Cutoff frequency; Cyclotrons; Electromagnetic heating; Electron beams; Gyrotrons; Microwave devices; Microwave oscillators; Particle beams; Space heating; Voltage;
Journal_Title :
Plasma Science, IEEE Transactions on
