%0 Journal Article
%A Hoesch, Moritz
%A Seltmann, Jörn
%A Trinter, Florian
%A Kühn, Steffen
%A Togawa, Moto
%A Steinbrügge, René
%A Bernitt, Sonja
%A Crespo López-Urrutia, José R.
%T Highly Charged Ions for High-Resolution Soft X-ray Grating Monochromator Optimisation
%J Journal of physics / Conference Series
%V 2380
%N 1
%@ 1742-6588
%C Bristol
%I IOP Publ.
%M PUBDB-2023-00653
%P 012086 
%D 2022
%X The energy-resolving performance of a synchrotron radiation monochromator can be characterised by measuring the fluorescence response of a gas in scans across characteristic absorption lines. Here, we describe a method using exceptionally narrow absorption features in the soft x-ray range. The features belong to helium-like ions and examples of the transition 1s → 2p in O<sup>6+</sup> and Ne<sup>8+</sup> are shown. We describe the instrument PolarX-EBIT and show typical data. A performance with ten times sharper effective feature width, when compared to neutral-gas absorption features, is demonstrated. 
%B 14th International Conference on Synchrotron Radiation Instrumentation
%C 28 Mar 2022 - 1 Apr 2022, Hamburg (Germany)
Y2 28 Mar 2022 - 1 Apr 2022
M2 Hamburg, Germany
%F PUB:(DE-HGF)8 ; PUB:(DE-HGF)16
%9 Contribution to a conference proceedingsJournal Article
%R 10.1088/1742-6596/2380/1/012086
%U https://bib-pubdb1.desy.de/record/570290