At the point of saturation in a high-gain free-electron laser (FEL) the light is fully transversely coherent. The number and evolution of the transverse modes is important for the effective tune-up and subsequent operation of FELs based on the photon beam characterization and in designing multi-module devices that rely on relatively stable saturation distances in each module. In the latter, this is particularly critical since each section will seed another module. Overall, in a single- or multi-module device, experimental users will desire stability in power and in photon beam quality. Using a numerical simulation code, the evolution of the transverse modes in the high-gain free-electron laser (FEL) is examined and is discussed. In addition, the transverse modes in the first few higher nonlinear harmonics are investigated. © 2004 Elsevier B.V. All rights reserved.
|Pages (from-to)||443 - 447|
|Number of pages||5|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|Publication status||Published - 1 Aug 2004|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics
Biedron, S. G., Freund, H. P., Milton, S. V., Dattoli, G., Renieri, A., & Ottaviani, P. L. (2004). Evolution of transverse modes in a high-gain free-electron laser. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 528(1-2), 443 - 447. https://doi.org/10.1016/j.nima.2004.04.128