An apparatus for high-resolution positron-annihilation induced Auger-electron spectroscopy using a time-of-flight technique

An apparatus for high-resolution positron-annihilation induced Auger electron spectroscopy (PAES) has been constructed at the intense slow positron beam line of the Electrotechnical Laboratory. The system uses a short pulsed positron beam (∼ ns width) and the time-of-flight (TOF) method for the energy analysis of the Auger electrons. In order to improve the energy resolution, an electrically isolated flight-tube is installed between a sample and a detector, and the electrons are retarded by biasing the flight tube. This method makes it possible to measure high-resolution PAES spectra with high efficiency.