Imaging x-ray spectrometer at the high energy density instrument of the European x-ray free electron laser. - Pan, X.; Šmíd, M.; Štefaníková, R.; Donat, F.; Baehtz, C.; Burian, T.; Cerantola, V.; Gaus, L.; Humphries, O. S.; Hajkova, V.; Juha, L.; Krupka, M.; et al. (Review of Scientific Instruments, 2023)