A status report on the development of a high power UV and IR FEL at CEBAF
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Previously we presented a design for a kiloWatt demonstration industrial UV FEL. Progress has been made in resolving several design issues identified in that work. More exact simulations of the injector have resulted in a better estimate of the injector performance. A more compact lattice has been designed meeting the design requirements for the UV FEL, and a new design point has been studied which greatly increases 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 with a high-current, energy-recovery accelerator. Designs for the optical cavity length and figure systems have been conceptualized and a model of the corner-cube resonator is being built and tested. Finally, three-dimensional simulations of the FEL have been carried out which show that the laser should exceed its minimum design goals for average power.
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