Non-linear simulation of X-ray free-electron lasers using realistic wiggler models

The non-linear simulation of X-ray free-electron lasers is dealt with using the non-wiggler-averaged MEDUSA simulation code and a realistic wiggler model built up from the contributions of permanent magnets in a Halbach configuration in conjunction with a model for a FODO lattice for enhanced focusing. The specific parameters of interest are relevant to the Linac Coherent Light Source (LCLS) design at SLAC and deals with a 15 GeV/5 kA electron beam, and a wiggler with a 3.0 cm period and an on-axis amplitude of approximately 12.7 kG which results in X-ray emission at wavelengths in the vicinity of 1.3 إ.