A STATUS-REPORT ON THE DEVELOPMENT OF A HIGH-POWER UV AND IR FEL AT CEBAF

Previously we presented a design for a kiloWatt demonstration industri al UV FEL [1]. Progress has been made in resolving several design issu es identified in that work. More exact simulations of the injector hav e resulted in a better estimate of the injector performance. A more co mpact lattice has been designed meeting the design requirements for th e UV FEL, and a new design point has been studied which greatly increa ses the threshold for longitudinal instabilities. A stability analysis of the RF control system has found that only minor modifications from existing CEBAF controls will be necessary to allow them to be used wi th a high-current, energy-recovery accelerator. Designs for the optica l cavity length and figure systems have been conceptualized and a mode l of the corner-cube resonator is being built and tested. Finally, thr ee-dimensional simulations of the FEL have been carried out which show that the laser should exceed its minimum design goals for average pow er.