An electron ion coincidence spectrometer for single and double photoionization studies

Abstract

A new electron ion coincidence spectrometer for the study of single and double photoionization in the gas phase is described. The spectrometer employs a pulse scheme, which allows high mass and electron energy resolutions to be achieved simultaneously; the mass resolution is greater than 200 (, FWHM definition) and the electron energy resolutions are 55 meV and 300 meV for studying single and double photoionization respectively. A position-sensitive electron detector enables multiplex electron detection which significantly enhances the sensitivity of the instrument.