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A new experimental technique for time-resolved X-ray absorption studies in the sub-second range has been successfully tested on the dispersive XAS beamline (ID24) at the ESRF. It consists of a sequential acquisition of energy points using the dispersive optics scheme installed on the beamline. Turbo-XAS takes full advantage of the properties of third-generation radiation sources, overcoming many of the problems encountered in the classical dispersive XAS mode, based on position-sensitive detectors. The new technique benefits from the basic assets of the dispersive set-up, i.e. the absence of movement of the optics and the extremely small and stable horizontal focal spot. In addition, it features simultaneous recording of I0 and I1 and the possibility of performing fluorescence and electron detection.
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