3-dimensional FEL theory
Abstract
A three-dimensional theory of an FEL operating with a continuous e-beam is discussed. A possible method for analyzing the transverse mode dynamics is illustrated and described, based on a generalized method of solution of the FEL Helmholtz equation in the high gain small signal regime. The proposed method analyzes the transverse mode dynamics in an FEL operating with an electron beam longitudinally continuous but transversally shaped. The method consists in expanding the optical field in terms of Hermite-Gaussian modes, taken at the entrance to the undulator.
- Publication:
-
Lasers 1989
- Pub Date:
- 1990
- Bibcode:
- 1990lase.conf..172D
- Keywords:
-
- Free Electron Lasers;
- Lasing;
- Current Distribution;
- Electron Scattering;
- Shapes;
- Lasers and Masers