Hamburg 2016 – scientific programme

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T: Fachverband Teilchenphysik

T 70: Kalorimeter II

T 70.3: Talk

Wednesday, March 2, 2016, 17:15–17:30, VMP6 HS E

The Time Structure of Hadronic Showers in Calorimeters with Gas and Scintillator Readout — •Philipp Goecke for the CALICE-D collaboration — Max-Planck-Institut für Physik , Munich, Germany

The focus of the CALICE collaboration is R&D of highly granular calorimeters. One of the possible applications is in a future TeV-scale linear e⁺e⁻ collider for precision SM studies and for direct and indirect the search of new physics. For the hadronic sampling calorimeters subsystem, several absorbers and active material technologies are being investigated.

In this frame, two similar experiments have been conducted to study the time structure of hadronic showers: FastRPC uses resistive plate chambers technology for the active layers whereas T3B is based on scintillating tiles coupled to SiPMs. The high sampling frequency of the readout, coupled to deep memory buffers, allows to carefully investigate the intrinsic time structure of hadronic showers with its prompt and delayed components. This study presents a detailed GEANT4 Montecarlo simulation of the FastRPC and T3B setups. It is aimed to reproduce test beam data acquired at CERN SPS where the setups were installed after  5λ of instrumented tungsten-based calorimeter prototypes. The main focus of the simulation lies on the physical processes involved in the time development of an hadronic showers, to asses the discrepancy that emerged in data for the two setups in the intermediate time range of 10 - 50 ns of shower development that can be explained with the neutron interactions in the medium.