Gain Measurement And Optimization Of The Energy Extraction From The Electrons Of The Frascati-ADONE FEL

Recent results on optical gain measurements on the ADONE FEL are reported and discussed. In addition, the results of a computer analysis of the Rayleigh length which optimizes the extraction of energy from the ADONE beam are discussed together their implications on the configuration of the optical cavity to be used for the FEL oscillator. These simulations have been based on a suitable extension of the Madey's theorem and on a representation of the electron work against the field of a gaussian beam by means of the far field radiated by the single electron. In turn, the accuracy of the calculated far field has been tested by comparison with the measured patterns of the spontaneous radiation.© (1984) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.