End-to-end simulation of a visible 1 kW FEL

In this paper we present the complete numerical simulation of the 1 kW visi ble Free Electron Laser under construction in Seattle. We show that the goa l of producing 1.0 kW at 0.7 mu m is well within the hardware capabilities. We simulate in detail the evolution of the electron bunch phase space in t he entire e-beam line. The e-beam line includes the photo-injector cavities , the 433.33 MHz accelerator, the magnetic buncher, the 1300 MHz accelerato r, the 180 degrees bend and the matching optics into the wiggler. The compu ted phase space is input for a three-dimensional time-dependent code that p redicts the FEL performance. All the computations are based on state of the art software, and the limitations of the current software are discussed. W e believe that this is the first time that such a thorough numerical simula tion has been carried out and that such a realistic electron phase space ha s been used in FEL performance calculations. (C) 2000 Elsevier Science B.V. All rights reserved.