Comparing FEL Codes for Advanced Configurations

Journal Article · 01 February 2018 · Proceedings of the International Free Electron Laser Conference

DOI: https://doi.org/10.18429/JACoW-FEL2017-MOP016 · OSTI ID:1443903

Garcia, Bryant W. ^[1]; Marcus, Garcia ^[1]; Campbell, Lawrence T. ^[2]; McNeil, Brian W. J. ^[3]; Reiche, Sven ^[4]

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1. SLAC National Accelerator Lab., Menlo Park, CA (United States)
2. STFC/DL/ASTeC, Daresbury, Warrington, Cheshire (United Kingdom)
3. USTRAT/SUPA, Glasgow, Scotland (United Kingdom)
4. PSI, Villigen PSI (Switzerland)

Various FEL codes employ different approximations and strategies to model the FEL radiation generation process. Many codes perform averaging procedures over various length scales in order to simplify the underlying dynamics. As FELs are developed in more advanced configurations beyond simple SASE, the assumptions of some codes may be called into question. Here, we compare the unaveraged code Puffin to averaged FEL codes including a new version of GENESIS in a variety of situations. In particular, we study a harmonic lasing setup, a High-Gain Harmonic Generation (HGHG) configuration modeled after the FERMI setup, and a potential Echo-Enabled Harmonic Generation (EEHG) configuration also at FERMI. Lastly, we find the codes are in good agreement, although small discrepancies do exist.

• Research Organization: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC02-76SF00515
• OSTI ID: 1443903
• Report Number(s): SLAC-PUB-17138; ISBN 978-3-95450-179-3
• Journal Information: Proceedings of the International Free Electron Laser Conference, Vol. 2017; Conference: 38th International Free-Electron Laser Conference, Santa Fe, New Mexico, USA, Aug. 20-25, 2017; ISSN 2673-5474
• Publisher: JACoW PublishingCopyright Statement
• Country of Publication: United States
• Language: English