Göttingen 2025 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 72: Detectors VII (Calorimeters)
T 72.1: Vortrag
Donnerstag, 3. April 2025, 16:15–16:30, VG 1.102
Results of the Megatile prototype for the CALICE AHCAL — Volker Büscher, Lucia Masetti, •Anna Rosmanitz, and Sebastian Ritter — Johannes Gutenberg-Universität Mainz
The CALICE collaboration has developped several highly granular calorimeter concepts for a future e+e− collider, that are designed for Particle Flow Algorithms.
The design used to produce a technological prototype of the Analog Hadronic Calorimeter (AHCAL) with more than 20k channels consists of 3x3 cm2 scintillator tiles read out by silicon photomultipliers (SiPM). Each tile is individually wrapped in reflective foil and glued to the boards. The final AHCAL detector would countain 8 million channels.
To facilitate the assembly process, the Megatile design is developed at the University of Mainz. It is made from a large scintillator plate which houses 12x12 channels at once.
The channels are separated by tilted trenches filled with a mixture of glue and TiO2 for reflectivity and optical insulation. Optical tightness is achieved by gluing reflective foil on both faces and varnishing the edges. Until now, ten prototypes have successfully been built, continuously monitored in a cosmic test-stand in Mainz and tested in several test beam campaigns at DESY and CERN.
This talk presents the latest technical developments and preliminary results from electron beam measurements. We’ll specifically focus on the Megatile’s efficiency and optical cross talk.