Open AccessA compact and versatile tender X‐ray single‐shot spectrometer for online XFEL diagnostics
Author(s) -
Rehanek Jens,
Milne Christopher J.,
Szlachetko Jakub,
Czapla-Masztafiak Joanna,
Schneider Jörg,
Huthwelker Thomas,
Borca Camelia N.,
Wetter Reto,
Patthey Luc,
Juranić Pavle
Publication year - 2018
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/s1600577517012796
Subject(s) - spectrometer , single shot , optics , physics , laser , pulse (music) , photon energy , linear particle accelerator , photon , resolution (logic) , beam (structure) , detector , computer science , artificial intelligence
One of the remaining challenges for accurate photon diagnostics at X‐ray free‐electron lasers (FELs) is the shot‐to‐shot, non‐destructive, high‐resolution characterization of the FEL pulse spectrum at photon energies between 2 keV and 4 keV, the so‐called tender X‐ray range. Here, a spectrometer setup is reported, based on the von Hamos geometry and using elastic scattering as a fingerprint of the FEL‐generated spectrum. It is capable of pulse‐to‐pulse measurement of the spectrum with an energy resolution (Δ E / E ) of 10 −4 , within a bandwidth of 2%. The Tender X‐ray Single‐Shot Spectrometer (TXS) will grant to experimental scientists the freedom to measure the spectrum in a single‐shot measurement, keeping the transmitted beam undisturbed. It will enable single‐shot reconstructions for easier and faster data analysis.