Transmission measurement at the Bernina branch of the Aramis Beamline of SwissFEL

Journal Article · 23 October 2019 · Journal of Synchrotron Radiation (Online)

DOI: https://doi.org/10.1107/S1600577519013237 · OSTI ID:1597377

Juranic, Pavle ^[1]; Tiedke, Kai ^[2]; Owada, Shigeki ^[3]; Tanaka, Takahiro ^[4]; Jastrow, Ulf ^[2]; Sorokin, Andrey ^[2]; Patthey, Luc ^[1]; Mankowsky, Roman ^[1]; Degenhardt, Markus ^[2]; Arbelo, Yunieski ^[1]; Arrell, Christopher ^[1]; Smedley, John Morgan  ^[5]; Bohon, Jennifer Michelle  ^[5]; Follath, Rolf ^[1]

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1. Paul Scherrer Inst. (PSI), Villigen (Switzerland)
2. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
3. Japan Synchrotron Radiation Research Inst. (Japan)
4. National Inst. of Advanced Industrial Science and Technology (AIST), Tsukuba (Japan)
5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

The transmission of the optical components of the Bernina branch of the Aramis beamline at SwissFEL has been measured with an X-ray gas monitor from DESY and compared with a PSI gas detector upstream of the optical components. The transmission efficiencies of the Mo, Si and SiC mirror coatings of the Aramis beamline and the various other in-beam components were evaluated and compared with theoretical calculations, showing an agreement of 6% or better in all cases. The experiment has also shown the efficacy of the high-harmonic rejection mirrors at the Bernina branch of the Aramis beamline at SwissFEL, and characterized the transmission efficiency of the on-line spectrometer in the Aramis beamline. The theoretical transmission of the mirror coatings match the experimental data to within 7%. The accuracy of these measurements was checked against a radiative bolometer from a Japanese collaboration and found to agree to a level of 4% or better. Further comparisons with a diamond detector from a US-based inter-institute collaboration demonstrated a good agreement for the attenuator settings of the beamline.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: 89233218CNA000001
• OSTI ID: 1597377
• Report Number(s): LA-UR--19-32574
• Journal Information: Journal of Synchrotron Radiation (Online), Journal Name: Journal of Synchrotron Radiation (Online) Journal Issue: 6 Vol. 26; ISSN 1600-5775; ISSN JSYRES
• Publisher: International Union of CrystallographyCopyright Statement
• Country of Publication: United States
• Language: English