The new method of collecting EXAFS data in dispersive mode will be recalled. Polychromatic radiation is used so that data over the entire EXAFS spectrum can be recorded simultaneously. The improved efficiency in data collection opens up the possibility of kinetic studies in material science, chemistry and biophysics. The first data obtained with a self-scanned photodiode array manufactured by EGandG Reticon (RC 256 EC/17) working at room temperature show that XANES study at a few ms time-scale can be expected since only 1.3 ms were required to collect the XANES plot of elemental Ni, the D.C.I. storage ring running at a 1.72 GeV, 250 mA positron energy and current. (orig.). Flank,-A.M. (Laboratoire pour l'Utilisation du Rayonnement Electromagnetique (LURE), Paris-11 Univ., 91 - Orsay (France); Poitiers-Univ.,-86 (France). Lab. Met. Physique); Fontaine,-A.; Raoux,-D. (Laboratoire pour l'Utilisation du Rayonnement Electromagnetique (LURE), Paris-11 Univ., 91 - Orsay (France); Paris-11-Univ.,-91-Orsay (France). Lab. de Physique des Solides); Jucha,-A.; Lemonnier,-M. (Laboratoire pour l'Utilisation du Rayonnement Electromagnetique (LURE), Paris-11 Univ., 91 - Orsay (France)); Williams,-C. (Laboratoire pour l'Utilisation du Rayonnement Electromagnetique (LURE), Paris-11 Univ., 91 - Orsay (France); College-de-France,-75-Paris.-Lab.-de-Physique-de-la-Matiere-Condensee)
