A linear integralequationbased computer code for selfamplified spontaneous emission calculations of freeelectron lasers
Abstract
The linear integralequationbased computer code "Roger Oleg Nikolai" (RON), which was recently developed at Argonne National Laboratory, was used to calculate the selfamplified spontaneous emission (SASE) performance of the freeelectron laser (FEL) being built at Argonne. Signal growth calculations under different conditions were used to estimate tolerances of actual design parameters and to estimate optimal length of the break sections between undulator segments. Explicit calculation of the radiation field was added recently. The measured magnetic fields of five undulators were used to calculate the gain for the Argonne FEL. The result indicates that the real undulators for the Argonne FEL (the effect of magnetic field errors alone) will not significantly degrade the FEL performance. The capability to calculate the smallsignal gain for an FELoscillator is also demonstrated.
 Publication:

Nuclear Instruments and Methods in Physics Research A
 Pub Date:
 May 2000
 DOI:
 10.1016/S01689002(00)001066
 Bibcode:
 2000NIMPA.445...19D