Dortmund 2021 – scientific programme

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T: Fachverband Teilchenphysik

T 82: Calorimeters II

T 82.1: Talk

Thursday, March 18, 2021, 16:00–16:15, Tg

Easing the assembly of the CALICE high-granularity Analogue Hadronic Calorimeter: an application of the Megatile concept — •Antoine Laudrain for the CALICE-D collaboration — Johannes Gutenberg Universität, Mainz, Germany

The CALICE collaboration is developing a high-granularity Analogue Hadronic Calorimeter (AHCal), designed for future experiments at lepton colliders. The current design includes around 8 million scintillator tiles, individually wrapped in a reflective foil and glued on a board, and read out by silicon photomultipliers (SiPM). After the successful assembly of a 22000-channel technological prototype (tested in beams at CERN in 2018), a new mechanical design easing the assembly is being developed.

The new concept relies on Megatiles, a large plate of scintillator housing 12x12 channels. The channels are separated by optical trenches filled with a glue-TiO2 mixture, ensuring both the mechanical robustness and the optical isolation. Several prototypes have been built and continuously tested in a cosmic-ray test stand at the University of Mainz. The performances are competitive compared to the original design. The latest developments presented in this talk improve the performance of edge channels and reduce the optical cross-talk between neighbouring channels.