The time structure of hadronic showers in highly granular calorimeters with tungsten and steel absorbers

Abstract

The intrinsic time structure of hadronic showers influences the timing\ncapability and the required integration time of hadronic calorimeters in\nparticle physics experiments, and depends on the active medium and on the\nabsorber of the calorimeter. With the CALICE T3B experiment, a setup of 15\nsmall plastic scintillator tiles read out with Silicon Photomultipliers, the\ntime structure of showers is measured on a statistical basis with high spatial\nand temporal resolution in sampling calorimeters with tungsten and steel\nabsorbers. The results are compared to GEANT4 (version 9.4 patch 03)\nsimulations with different hadronic physics models. These comparisons\ndemonstrate the importance of using high precision treatment of low-energy\nneutrons for tungsten absorbers, while an overall good agreement between data\nand simulations for all considered models is observed for steel.\n