Turbo-XAS: dispersive XAS using sequential acquisition

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.