Open AccessSpectral monitoring at SwissFEL using a high‐resolution on‐line hard X‐ray single‐shot spectrometer
Author(s) -
David Christian,
Seniutinas Gediminas,
Makita Mikako,
Rösner Benedikt,
Rehanek Jens,
Karvinen Petri,
Löhl Florian,
Abela Rafael,
Patthey Luc,
Juranić Pavle
Publication year - 2021
Publication title -
journal of synchrotron radiation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.172
H-Index - 99
ISSN - 1600-5775
DOI - 10.1107/s1600577521009619
Subject(s) - beamline , spectrometer , optics , synchrotron , laser , photon energy , photon , spectral resolution , advanced photon source , synchrotron radiation , resolution (logic) , x ray , materials science , physics , beam (structure) , spectral line , astronomy , artificial intelligence , computer science
The performance and parameters of the online photon single‐shot spectrometer (PSSS) at the Aramis beamline of the SwissFEL free‐electron laser are presented. The device operates between the photon energies 4 and 13 keV and uses diamond transmission gratings and bent Si crystals for spectral measurements on the first diffraction order of the beam. The device has an energy window of 0.7% of the median photon energy of the free‐electron laser pulses and a spectral resolution (full width at half‐maximum) Δ E / E on the order of 10 −5 . The device was characterized by comparing its performance with reference data from synchrotron sources, and a parametric study investigated other effects that could affect the reliability of the spectral information.