Wuppertal 2015 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 64: Kalorimeter 2

T 64.7: Vortrag

Mittwoch, 11. März 2015, 18:15–18:30, G.10.03 (HS 8)

A Design of Scintillator Tiles Read Out by Surface-Mounted SiPMs for a Future Hadron Calorimeter — •Yong Liu, Lennart Adam, Volker Büscher, Julien Caudron, Phi Chau, Sascha Krause, Lucia Masetti, Ulrich Schäfer, Rouven Spreckels, Stefan Tapprogge, and Rainer Wanke — Institut für Physik and PRISMA Detector Lab, Johannes Gutenberg-Universität Mainz

Precision calorimetry using highly granular sampling calorimeters is being developed based on the particle flow concept within the CALICE collaboration. One design option of a hadron calorimeter is based on silicon photomultipliers (SiPMs) to detect photons generated in plastic scintillator tiles. Driven by the need of automated mass assembly of around ten million channels stringently required by the high granularity, a design of scintillator tiles directly coupled with surface-mounted SiPMs has been developed. A cavity is created in the center of the bottom surface of each tile to provide enough room for the whole SiPM package and to improve collection of the light produced by incident particles penetrating the tile at different positions. The cavity design has been optimized using a GEANT4-based full simulation model to achieve high response to Minimum Ionizing Particles (MIPs) and also good areal uniformity. Cosmic-ray measurements confirm a high 1-MIP response for scintillator tiles with an optimized cavity design. Uniformity measurements by scanning the tile area using focused electrons from a beta source shows exellent response uniformity.