Multiple-plate total-absorption ionization spectrometer based on compressed gas

Abstract The characteristics of a multiple-plate total absorption spectrometer based on compressed xenon (up to 25 atm) have been investigated. The dependence of the energy resolution on the working gas density and on the material and thickness of the absorber plates was studied. The ability of the spectrometer with a tungsten absorber to separate hadrons and electrons of momentum 6 GeV/ c according to the total energy release and to the characteristics of the longitudinal development of cascade showers was also investigated. It is shown that in energy resolution the high pressure gas spectrometer is very little different from the corresponding liquid-argon spectrometer and in time resolution it is even superior to it.