Enhancement of high-harmonic gyrotron gain by a dielectric rod
Abstract
A dielectric rod is shown to reduce the energy requirements of the electron beam for high-harmonic gyrotron operation. A large interaction filling factor can occur for moderate-energy electrons (∼80 keV) spiralling around the rod within the evanescent region of a dielectric waveguide mode. Since the magnetic field strength is reduced by an order of magnitude in an interaction at the tenth harmonic of the cyclotron frequency, a submillimeter-wave gyrotron is now truly feasible because the acceleration voltages can be conveniently produced by DC power supplies.
- Publication:
-
International Journal of Infrared and Millimeter Waves
- Pub Date:
- September 1983
- DOI:
- 10.1007/BF01009701
- Bibcode:
- 1983IJIMW...4..831M
- Keywords:
-
- Cyclotron Resonance Devices;
- Dielectrics;
- Electron Beams;
- Harmonic Generations;
- Microwave Amplifiers;
- Submillimeter Waves;
- Electron Energy;
- Electron Radiation;
- Energy Conversion Efficiency;
- Energy Requirements;
- Field Mode Theory;
- Gyrofrequency;
- Magnetic Fields;
- Rods;
- Electronics and Electrical Engineering;
- High-harmonic gyrotron;
- dielectric rod;
- energy requirements;
- electron beam;
- filling factor