Angle-resolving electron-electron coincidence setup

We introduce a novel angle-resolving electron-spectrometer system for coinc idence studies of gas-phase targets using the timing structure of synchrotr on radiation. The experimental setup, mainly consisting of a cylindrical mi rror analyzer with a position sensitive detector and an electron time-of-fl ight spectrometer is particularly useful in cases where low-kinetic-energy electrons are measured in coincidence with high-kinetic-energy electrons. T he experimental method and corresponding electronics are discussed. As an e xample, we present argon LMM Auger electron spectra taken in coincidence wi th KL2,3L2,3 and KL1L2,3 Auger electrons after resonant 1s-->4p photoexcita tion. (C) 1999 American Institute of Physics. [S0034-6748(99)02804-X].