Engineering of long length CsI:Tl scintillators for high energy physics

Abstract

It is shown that engineering of long length CsI:Tl scintillators for medium and high energy physics projects significantly depends of the primary performance of scintillation single crystal. In particular statistical study on several hundred samples for different project justify significant role of the Tl concentration. Tl concentration gradient along the bar and final finishing (stability of surface roughness for the light collection tuning) in the technology optimization for scintillator production. It is necessary to note, that any of these parameters are not taken into account in the Monte Carlo simulation (Geant 4) that usually use as the start point for the scintillator optimization.