A new approach for QEXAFS data acquisition

Quick-scanning EXAFS (QEXAFS) data were recorded by direct readout of the ionization chambers by means of current amplifiers and a high speed analog to digital converter (ADC) which enables the simultaneous measurement of 4 individual channels with sampling rates of up to 200 kHz. QEXAFS spectra covering an energy range of more than 2000 eV as well as XANES data are presented. The results show that near edge spectra of metal foils can be measured in about 5 ms with an excellent reproducibility. First applications of this setup in catalysis research will be discussed.