Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 63: Detectors 6 (calorimeters)

T 63.6: Talk

Wednesday, March 6, 2024, 17:15–17:30, Geb. 30.23: 2/1

Results of the Megatile prototype for the CALICE AHCAL — •Anna Rosmanitz for the CALICE-D collaboration — Johannes-Gutenberg Universität Mainz

The CALICE collaboration develops several highly granular calorimeter concepts for a future e⁺e⁻ collider, that are designed for Particle Flow Algorithms. The current design for the Analog Hadronic Calorimeter (AHCAL) 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 contain 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 test beam measurements.
This includes a high-resolution scan of the megatile performance in the inter-channel region across the tilted TiO₂ trenches, utilizing a beam telescope to study MIP-like energy depositions without any absorber material.