A multipurpose system has been constructed for ion and electron measurement
s. The system can be used as a time of flight ion mass spectrometer, conven
tional electron spectrometer or threshold electron spectrometer. In the fut
ure it is planned to use the system as a coincidence spectrometer between i
ons and electrons with selected kinetic energies. The construction of the s
ystem is described and some measured spectra are presented. (C) 2001 Elsevi
er Science B.V. All rights reserved.