Spectral properties and parametric dependence of scattered radiation in stimulated Raman scattering from an intense relativistic electron beam
Abstract
Stimulated Raman scattering from both the electrostatic plasma wave and the cyclotron wave idler modes were observed. Scattered frequency is tunable and its dependence upon beam energy, ripple period, and guiding magnetic field agree with theory. The spectral linewidth delta lambda divided by lambda increases linearly from 8% to 12% as the pump wave amplitude is increased. Measurements of the scattered power versus rippled field strength demonstrate the linear relationship characteristic of the stimulated process. Experiments have verified the existence of a density-dependent threshold in pump wave amplitude, below which emission is not stimulated. Minima in the scattered radiation at particular values of guiding magnetic field are interpreted as cyclotron harmonic damping of the pump and scattered waves.
- Publication:
-
Ph.D. Thesis
- Pub Date:
- 1978
- Bibcode:
- 1978PhDT........37G
- Keywords:
-
- Electron Beams;
- Raman Spectra;
- Relativistic Effects;
- Spectrum Analysis;
- Dependent Variables;
- Electromagnetic Scattering;
- Parameterization;
- Plasmas (Physics);
- Nuclear and High-Energy Physics