Analysis of the effects of plasmas and beam slippage in optical klystron FEL devices

Abstract: We examine here the effects of plasmas and beam slippage on the gain of an optical klystron (OK) free electron laser (FEL) device under the influence of a weak guiding magnetic field and background plasma. The beam energy spread decreases with background plasma density and increases with beam plasma density . The maximum gain () scales proportional to . The beam slippage phase Δψ scales directly to five power of relativistic factor and one half power to . [Copyright &y& Elsevier]