Saturation of a high-gain single-pass FEL

✍ Scribed by S Krinsky

• Publisher: Elsevier Science
• Year: 2004
• Tongue: English
• Weight: 192 KB
• Volume: 528
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2004.04.017

✦ Synopsis

We study a perturbation expansion for the solution of the nonlinear one-dimensional FEL equations. We show that in the case of a monochromatic wave, the radiated intensity satisfies a scaling relation that implies, for large distance z traveled along the undulator, a change in initial value of the radiation field corresponds to a translation in z (lethargy). Analytic continuation using Pad! e approximates yields accurate results for the radiation field early in saturation.