In this paper we investigate and compare the properties of two narrow bandwidth free-electron laser (FEL) schemes, one using self-seeding and the other high gain harmonic generation (HGHG). The two systems have been thoroughly studied analytically and numerically in the past. The aim of this work is to compare their performances when the FEL is driven by an electron beam with non-ideal properties, thus including effects such as shot-to-shot energy fluctuations and nonlinear energy chirp. In both cases non-linearities produce a bandwidth larger than the Fourier transform limited value. However the results of our analysis indicate that the self-seeding scheme is less affected by non-ideal electron phase space distribution than the HGHG seeding scheme and thus has a larger number of FEL photons per unit frequency.
|Publication status||Published - 2009|
|Event||31st International Free Electron Laser Conference, FEL 2009 - , United Kingdom|
Duration: 1 Jan 2009 → …
|Conference||31st International Free Electron Laser Conference, FEL 2009|
|Period||1/1/09 → …|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Marinelli, A., Pellegrini, C., Reiche, S., & Giannessi, L. (2009). A comparison between high-gain harmonic generation and self-seeding for the production of narrow bandwidth radiation in a free-electron laser. Paper presented at 31st International Free Electron Laser Conference, FEL 2009, United Kingdom.