Abstract:

Over the last decade, inverse Compton scattering (ICS) sources have emerged as one of the most promising types of compact X-ray sources. The Munich Compact Light Source (MuCLS), located at the Technical University of Munich, is the first application-centered ICS facility. It consists of a commercial ICS source (Lyncean Technologies) and two experimental endstations developed in-house, dedicated to transferring synchrotron techniques to a laboratory framework. In this talk, I would like to present the development of a dispersive X-ray absorption spectroscopy (XAS) setup at our facility. We started the XAS project at the MuCLS in 2018 and published the first results in 2020 [1], which was also the first XAS demonstration with an ICS source. The XAS setup is based on a Laue geometry employing a slightly bent, asymmetric silicon crystal. I will describe the instrumentation and data workflow, and present an in situ demonstration on a palladium-based catalyst [2]. Besides the fundamental XAS demonstrations, I will show some proof-of-principle results of adapting the Laue setup for two-element simultaneous XAS [3], K-edge subtraction imaging and 2d XANES imaging.

Reference: 1. J. Huang et al. Sci. Rep., 2020, 10, 8772. 2. J. Huang et al. J. Anal. At. Spectrom., 2021, 36, 2649-2659. 3. J. Huang et al. J. Synchrotron Radiat., 2021, 28, 1874-1880

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