44A　Quick-scanning X-ray Absorption Spectroscopy

Quick-scanning X-ray absorption spectroscopy beamline using bending magnet at Taiwan Photon Source (TPS) was newly constructed for the studies of Physics, Chemistry, Biology, Environmental and Arts. This beamline provides the capability of the fast scanning and step-by-step scanning for in situ time-resolved measurements and conventional XAS experiments respectively. The acquired time for a full quick-scanning EXAFS spectrum is less than 100 milliseconds over 1000 eV. The short lived intermediate states in chemical reaction such as charge/discharge process and catalytic process can be observed by using in situ time-resolved measurements. Additionally, the beam spot can be focused down to 5 by 5 micrometer by a set of KB-mirrors to provide the capability of microprobe analysis. The element or valence distribution can be well probing by fluorescence image mapping.