Abstract
A new X-ray spectrometer has been installed in the BL08W beamline at SPring-8 for high-resolution Compton scattering measurements using 90–120 keV X-rays. The spectrometer consists of a Cauchois-type triple-crystal analyzer and a quasi position sensitive detector with four slits. The detector works not only as a position-sensitive detector but also as an energy sensitive detector, which allows for low background noise measurements. An overall resolution of 0.10 atomic units in momentum space has been achieved at the incident X-ray energy of 115 keV. Compton profiles of niobium have been measured along the [1 0 0] and [1 1 0] directions in order to demonstrate the performance of the spectrometer.
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