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Abstract
Free-electron laser facilities enable new applications for transient phenomena like the response of dynamical excitations. One key application in the high-energy density regime is the study of the dynamic structure factor as it allows us to retrieve electron and ion temperatures in warm and hot dense matter on a short time scale. High-resolution inelastic X-ray Scattering (hrIXS) at a self-seeded XFEL has proven to be a suitable method to measure dynamic ion features of both crystalline and non-crystalline materials. The high-energy density (HED) science instrument at European XFEL is an experimental station dedicated to studies of matter at excited states. Among other techniques, high-resolution IXS is possible at the HED science instrument. HrIXS is realized for 7.494 keV by a combination of the generic beamline monochromator and a high-resolution monochromator specially designed for this purpose. In this contribution, we describe the setup used in the first user run and show some results obtained from in-house beamtime and a proof-of-principle experiment in May 2019.