TEMPORAL AND SPECTRAL EVOLUTION OF A STORAGE-RING FEL SOURCE - EXPERIMENTAL RESULTS ON SUPER-ACO AND NEW THEORETICAL APPROACH

Because of the complex interaction in a storage ring FEL system (SRFEL + storage ring), SRFELs show various phenomena. Conventional theoreti cal models, such as the super-modes model, can not treat the dynamic b ehavior of the SRFELs, or do not contain spectral effects. In this pap er, a new simulation model is presented, which enables the study of te mporal and spectral behavior of a SRFEL. Novel is that this model star ts from the spontaneous emission spectrum, which is specially importan t for small gain FELs. The simulation results are compared with the ex perimental observations of the Super-ACO FEL. We have also used the si mulation code to study the response of the laser to perturbation on th e beam. These results provide meaningful aspects for designing new sto rage rings.