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

摘要

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 n(op) and increases with beam plasma density n(ob). The maximum gain (G(max)) scales proportional to n(op)(2). The beam slippage phase Delta psi scales directly to five power of relativistic factor gamma(o) and one half power to n(ob). (C) 2008 Elsevier B.V. All rights reserved.