Journal Article

PUBDB-2023-04158

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Undulator linear taper control at the European X-Ray Free-Electron Laser facility

Tomin, S. (Corresponding author)DESY* ; Kaiser, J.DESY* ; Lockmann, N. M.DESY* ; Wohlenberg, T.DESY* ; Zagorodnov, I.DESY*

2024
American Physical Society College Park, MD

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Please use a persistent id in citations: doi:10.1103/PhysRevAccelBeams.27.042801  doi:10.3204/PUBDB-2023-04158

Abstract: Undulator tapering controls the resonance properties of the Free-Electron Laser (FEL) amplification process. Energy losses in an undulator, caused by synchrotron radiation and wakefields within the undulator's vacuum chamber, determine the undulator's linear taper. Synchrotron radiation contribution can be calculated analytically, while calculating wakefield energy loss necessitates a beam current profile.We introduce a system for the automatic estimation of wakefield energy loss, which leverages non-invasive THz diagnostics, a current profile reconstruction algorithm enhanced with machine learning, and a recently developed analytical wakefield function for the undulator beamline. The effectiveness of this approach was validated by directly measuring wakefield-induced electron beam energy loss in the European XFEL's undulator section.

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Contributing Institute(s):

1. Koordination des XFEL-Beschleunigers (MXL)
2. Beschleunigerphysik (MPY)
3. Vakuumsysteme (MVS)
4. Strahlkontrollen (MSK)

Research Program(s):

1. 621 - Accelerator Research and Development (POF4-621) (POF4-621)
2. 6G13 - Accelerator of European XFEL (POF4-6G13) (POF4-6G13)

Experiment(s):

1. Facility (machine) XFEL

Appears in the scientific report 2024

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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