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@inproceedings{robles:ipac2021-tupab084,
author = {R. Robles and Z. Huang and G. Marcus},
title = {{An Empirically-Derived ABCD Matrix for Transverse Dynamics Studies in Seeded Free-Electron Lasers}},
booktitle = {Proc. IPAC'21},
pages = {1573--1576},
eid = {TUPAB084},
language = {english},
keywords = {FEL, radiation, electron, laser, free-electron-laser},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-TUPAB084},
url = {https://jacow.org/ipac2021/papers/tupab084.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-TUPAB084},
abstract = {{We present a simple empirical method for deriving an ABCD matrix for studying the transverse dynamics of the radiation field in seeded, high-gain free-electron lasers before saturation. In spite of the inherently nonlinear nature of FEL optical guiding, the ABCD matrix we find is able to predict the evolution of the FEL mode size and centroid to a high degree of accuracy across a large range of input mode characteristics. This scheme enables extremely fast simulation of transverse dynamics, which in turn greatly simplifies numerical studies of seeded FEL systems. Of particular interest in that regard is the x-ray regenerative amplifier free-electron laser, in which the x-ray beam propagates through an optical cavity many hundreds of times, thereby making traditional simulation methods cumbersome and time consuming.}},
}