SMuK 2023 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 2: Instrumentation I

HK 2.3: Vortrag

Montag, 20. März 2023, 17:15–17:30, SCH/A251

Performance of the EPICAL-2 ultra-high granularity electromagnetic calorimeter prototype — •Tim Sebastian Rogoschinski for the ALICE Germany collaboration — Institut für Kernphysik, Goethe-Uni Frankfurt

The EPICAL-2 detector has been designed and constructed within the endeavour to develop a novel electromagnetic calorimeter based on a SiW sampling design using silicon pixel sensors with binary readout. The R&D is performed in the context of the proposed Forward Calorimeter upgrade within the CERN-ALICE experiment and is strongly related to proton CT imaging studies as well as applicable to future collider projects.

EPICAL-2 consists of alternating W absorber and Si sensor layers employing the ALPIDE sensor developed for the ALICE-ITS upgrade. It has a total thickness of  20 radiation lengths, an area of 30 mm×30 mm, and  25 million pixels of size ∼ 30 × 30   µ m². EPICAL-2 has been successfully tested with cosmic muons as well in test-beam campaigns at DESY and CERN-SPS.

We will report on results on calibration from cosmic muons and on the combined energy measurement performance obtained at both DESY and SPS. Furthermore, we will present results on the electromagnetic shower shape description. Both the performance and the shape description can be reproduced by simulation.
Supported by BMBF and the Helmholtz Association.