Preprint/Internal Report

PUBDB-2015-01427

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Theoretical Computation of the Polarization Characteristics of an X-ray Free-Electron Laser with Planar Undulator

Geloni, G. (Corresponding Author)>Extern*XFEL* ; Kocharyan, V.DESY* ; Saldin, E.DESY*

2015

This record in other databases:  

Report No.: DESY-15-021; arxiv:1502.04627

Abstract: We show that radiation pulses from an X-ray Free-Electron Laser (XFEL) with a planar undulator, which are mainly polarized in the horizontal direction, exhibit a suppression of the vertical polarization component of the power at least by a factor $\lambda_w^2/(4 \pi L_g)^2$, where $\lambda_w$ is the length of the undulator period and $L_g$ is the FEL field gain length. We illustrate this fact by examining the XFEL operation under the steady state assumption. In our calculations we considered only resonance terms: in fact, non resonance terms are suppressed by a factor $\lambda_w^3/(4 \pi L_g)^3$ and can be neglected. While finding a situation for making quantitative comparison between analytical and experimental results may not be straightforward, the qualitative aspects of the suppression of the vertical polarization rate at XFELs should be easy to observe. We remark that our exact results can potentially be useful to developers of new generation FEL codes for cross-checking their results.

Note: OA

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Contributing Institute(s):

1. European XFEL (Eur.XFEL)

Research Program(s):

1. 6G13 - XFEL (POF3-622) (POF3-622)

Experiment(s):

1. Facility (machine) XFEL

Appears in the scientific report 2015

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Database coverage:
; Published

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Geloni, G. (Corresponding author)>Extern*XFEL.EU* ; Kocharyan, V.DESY* ; Saldin, E.DESY*
Theoretical computation of the polarization characteristics of an X-ray Free-Electron Laser with planar undulator
Optics communications 356, 435 - 444 (2015) [10.1016/j.optcom.2015.07.048]2015     Files  Fulltext BibTeX | EndNote: XML, Text | RIS

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Report/Contribution to a conference proceedings/Contribution to a book Geloni, G. (Corresponding author)>Extern*XFEL.EU* ; Kocharyan, V.DESY* ; Saldin, E.DESY*
Theoretical Computation of the Polarization Characteristics of an X-ray Free-Electron Laser with Planar Undulator
2015Proceedings of FEL 2015: FEL Theory
37th International Free Electron Laser Conference, FEL 2015, DaejeonDaejeon, Korea, 23 Aug 2015 - 28 Aug 20152015-08-232015-08-28 1-5 (2015)2015     Files  Fulltext Fulltext by arXiv.org Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

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