The instability boundary and growth rate contours of the gyrotron amplifier with spreads in energy and momenta
Abstract
The combined effects of the spreads in energy and axial momentum of annular beam electrons in a gyrotron amplifier are spectrally investigated. A conveniently normalized dispersion relation is found for TE modes, and analyzed to obtain the instability boundary and growth rate contours. The spread effects prove to reduce the growth rate near the beam-waveguide synchronous mode, and enhance it for the mode out of synchronization. In particular the growth rate at the synchronous mode tends to peak when the electron distribution is thermally isotropic.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- November 1979
- Bibcode:
- 1979STIN...8018319C
- Keywords:
-
- Cyclotron Resonance Devices;
- Electron Beams;
- Microwave Amplifiers;
- Dispersion;
- Energy Transfer;
- Harmonics;
- Spectrum Analysis;
- Stability;
- Synchronism;
- Electronics and Electrical Engineering