Contribution to a conference proceedings

PUBDB-2021-05192

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Correcting the Magnetic Field Offsets Inside the Undulators of the EuXFEL Using the K-Monochromator

Brinker, F. (Corresponding author)DESY* ; Casalbuoni, S.XFEL.EU* ; Freund, W.XFEL.EU*

2021

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Please use a persistent id in citations: doi:10.18429/JACoW-IPAC2021-THPAB080  doi:10.3204/PUBDB-2021-05192

Abstract: Hard X-ray free-electron lasers (XFELs) generate intense coherent X-ray beams by passing electrons through undulators, i.e. very long periodic magnet structures, which extend over hundreds of meters. A crucial condition for the lasing process is the spatial overlap of the electrons with the electromagnetic field. Well-established electron beam-based procedures allow finding a straight trajectory for the electrons defined by the beam position monitors (BPM) between the undulators. A bending of the trajectory in between the BPMs cannot be seen by these methods. A general field offset inside the undulators has the effect that the synchrotron radiation is emitted at a different angle at the beginning and the end of the undulator which can result in a degradation of the FEL-gain especially for very short wavelengths. We report on how the spectral and spatial characteristics of the monochromatized radiation of a single undulator can be used to minimize the field offset in situ with the help of correction coils.

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Contributing Institute(s):

1. Injektion (MIN)
2. Undulator Systems (XFEL_DO_ID_UND)
3. X-Ray Photon Diagnostics (XFEL_DO_ID_XPD)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)

Experiment(s):

1. Facility (machine) XFEL

Appears in the scientific report 2021

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Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Poster Brinker, F. (Corresponding author)DESY* ; Casalbuoni, S.XFEL.EU* ; Freund, W.XFEL.EU*
Correcting the Magnetic Field Offsets Inside the Undulators of the EuXFEL Using the K-Monochromator
202112th International Particle Accelerator Conference, IPAC21, CampinasCampinas, Brazil, 24 May 2021 - 28 May 20212021-05-242021-05-28     Files BibTeX | EndNote: XML, Text | RIS

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