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We present a low-cost laboratory X-ray absorption spectrometer that uses aconventional X-ray tube source and bent Johann-type crystal monochromators. Theinstrument is designed for XAS studies in the 4-20 keV range which covers mostK edges of 3d transition metals and L edges of 5d transition metals andactinides. The energy resolution is typically in the range of 1-5 eV at 10 keVdepending on the crystal analyser and the Bragg angle. Measurements can beperformed in transmission, fluorescence, and imaging modes. Due to its simpleand modular design, the spectrometer can be modified to accommodate additionalequipment and complex sample environments required for e.g. in situ studies. Ashowcase of various applications is presented.

Johann-type laboratory-scale X-ray absorption spectrometer with versatile detection modes