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HK: Fachverband Physik der Hadronen und Kerne

HK 17: Instrumentation IV

HK 17.1: Group Report

Tuesday, March 12, 2024, 15:45–16:15, HBR 19: C 2

The PANDA Forward-Endcap EMC Test-Beamtime @COSY — •Celina Frenkel for the PANDA collaboration — Institut für Strahlen- und Kernphysik, Universität Bonn

The forward endcap (FWEC) of the electromagnetic calorimeter of the PANDA-experiment equipped with ≈ 20% of its crystals was tested for the first time under final conditions at the COSY accelerator at FZ-Jülich. The assembly of the FWEC started in March 2023, where all detector components were put together including the mechanical structures, the built, tested and precalibrated detector modules, the cooling system and the readout electronics.

Two weeks of proton-beamtime in August and September were conducted using a beam momentum of 2.74 GeV/c and a plastic target. For a comprehensive data analysis, full waveforms from the FWEC-SADCs were recorded. During the second week of beamtime, a stable operation of the detector as a common system at the intended temperature of -25^∘C and therefore one of the main aims of the test-beamtime was achieved. The other aim was to measure photons as the decay products of the π⁰ which will in future be the basis to perform a pion calibration for each individual readout channel.

This talk will give an overview on the assembly of the FWEC at COSY and present first data analysis results including the different steps of raw data pre-processing as well as results from data reconstruction using PandaRoot leading to the observation of a π⁰-signal.

Supported by BMBF and supported within the MKW programme "Netzwerke 2021" (project "NRW-FAIR", ID: NW21-024-C).

Keywords: PANDA; EMC