Journal Article

PUBDB-2023-06753

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Harmonic radiation contribution and X-ray transmission at the Small Quantum Systems instrument of European XFEL

Baumann, T. (Corresponding author)XFEL.EU* ; Boll, R.XFEL.EU* ; De Fanis, A.XFEL.EU* ; Grychtol, P.XFEL.EU* ; Ilchen, M.XFEL.EU*DESY* ; Jastrow, U. F.XFEL.EU*DESY* ; Kato, M. ; Lechner, C.XFEL.EU*DESY* ; Maltezopoulos, T.XFEL.EU* ; Mazza, T.XFEL.EU* ; Montaño, J.XFEL.EU* ; Music, V.XFEL.EU*DESY* ; Ovcharenko, Y.XFEL.EU* ; Rennhack, N.XFEL.EU* ; Rivas, D. E.XFEL.EU* ; Saito, N.Extern*XFEL.EU* ; Schmidt, P. ; Serkez, S. ; Sorokin, A.Extern*XFEL.EU* ; Usenko, S. ; Yan, J. ; Geloni, G. ; Tanaka, T. ; Tiedtke, K.XFEL.EU*DESY* ; Meyer, M. (Corresponding author)XFEL.EU*

2023
Wiley-Blackwell [Erscheinungsort nicht ermittelbar]

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Please use a persistent id in citations: doi:10.1107/S1600577523003090

Abstract: Transmission measurements of the soft X-ray beamline to the Small Quantum Systems (SQS) scientific instrument at the SASE3 undulator of European XFEL are presented. Measurements are reported for a wide range of photon energies (650 eV to 2400 eV), using X-ray gas monitors as well as a bolometric radiometer. The results are in good agreement with simulations for the beam transport and show a transmission of up to 80% over the whole photon energy range. The contribution of second- and third-harmonic radiation of the soft X-ray undulator is determined at selected photon energies by performing transmission measurements using a gas absorber to provide variable attenuation of the incoming photon flux. A comparison of the results with semi-analytic calculations for the generation of free-electron laser pulses in the SASE3 undulator reveals an influence of apertures along the beam transport on the exact harmonic content to be accounted for at the experiment. The second-harmonic content is measured to be in the range of 0.1% to 0.3%, while the third-harmonic contributed a few percent to the SASE3 emission. For experiments at the SQS instrument, these numbers can be reduced through specific selections of the mirror reflection angles.

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Contributing Institute(s):

1. FLASH Photonen-Diagnose und Steuerungen (FS-FLASH-D)
2. The European XFEL Users (XFEL-User)
3. SQS (XFEL_E2_SQS)

Research Program(s):

1. 631 - Matter – Dynamics, Mechanisms and Control (POF4-631) (POF4-631)

Experiment(s):

1. XFEL Beamline SASE 3 (XFEL)

Appears in the scientific report 2023

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Database coverage:
; ; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DOAJ Seal ; Ebsco Academic Search ; IF < 5 ; JCR ; Nationallizenz ; PubMed Central ; SCOPUS ; Web of Science Core Collection

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