The freeelectron laser from a laserphysics perspective
Abstract
Coupled Maxwell and quasiBloch equations are derived and shown to compose a fully selfconsistent theory, valid for moderately saturated operating conditions of a freeelectron laser (FEL). The coupled equations are used to analyze coherent pulse propagation in the picosecond pulse regime of the Stanford FEL; coherent transient effects are discussed and used to explain the powertuning characteristics of the FEL. The electron momentum distributions and optical spectra are calculated and shown to be in good qualitative agreement with experiment. Finally, an improved selfconsistent theory valid for strong saturation is developed by applying multiple scaling perturbation theory to the coupled Maxwell and Boltzmann equations.
 Publication:

FreeElectron Generators of Coherent Radiation
 Pub Date:
 1980
 Bibcode:
 1980fegc.proc...31H
 Keywords:

 Atomic Physics;
 Free Electron Lasers;
 Maxwell Equation;
 Perturbation Theory;
 Pulsed Lasers;
 BoltzmannVlasov Equation;
 Distribution Functions;
 Electron Bunching;
 Electron Energy;
 Laser Modes;
 Laser Outputs;
 Moment Distribution;
 Power Gain;
 Relativistic Electron Beams;
 Lasers and Masers