Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 17: Kalorimeter

T 17.9: Vortrag

Montag, 25. März 2019, 18:00–18:15, ST 1

Tile assembly and calibration of CALICE AHCAL technological prototype and tests of Megatile prototypes — •Phi Chau and Sebastian Ritter for the CALICE-D collaboration — Johannes Gutenberg-Universität Mainz, Institut für Physik

Several calorimeter concepts are under development by the CALICE collaboration, each of them is optimized for Particle Flow Algorithm. The design of the Analog Hadronic CALorimeter (AHCAL), a sampling calorimeter for a future electron-positron collider, is realized with around 8,000,000 scintillator tiles each wrapped in reflector foil and read out by a silicon photomultiplier (SiPM). Because of these large numbers of channels, an optimization of construction, assembly and calibration is necessary. In 2017/18 the AHCAL-groups have constructed a technological prototype with around 22,000 channels. The tile assembly has been realized with an automated gluing and placing procedure and a light yield calibration with cosmics has been performed as part of a quality check. Also, an alternative scintillator concept, the Megatile, was developed at the University of Mainz for further simplification of the assembly. A full-scale prototype plate with 12 x 12 channels, each separated with tilted reflective TiO₂ trenches, was produced and tested. Results of this and previous prototypes show comparable light yields to those of the individually wrapped scintillator tiles and an adequate low channel to channel crosstalk.