Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 72: Detectors VII (Calorimeters)

T 72.7: Vortrag

Donnerstag, 3. April 2025, 17:45–18:00, VG 1.102

Pointing Studies with the SHiP Calorimeter Prototype — •Sebastian Ritter, Claudia Delogu, Rainer Wanke, Matei Climescu, and Volker Büscher — Johannes-Gutenberg Universität, Mainz

The SHiP experiment (Search for Hidden Particles) is an approved fixed-target experiment designed to explore the possible hidden sector of particle physics at the CERN SPS. An important component of SHiP is its electromagnetic calorimeter, which has to combine good energy resolution with the capability to reconstruct the direction of incoming neutral particles (pointing) as well as the identification of particles (PID). To validate the current design proposal, a conceptual prototype was tested at the DESY test beam facility in Hamburg. The prototype employs a modular sandwich structure with alternating layers of plastic scintillator readout by SiPMs and iron absorbers. During the test beam campaign, its performance was evaluated using electron beams with energies from 1 to 5.8 GeV and incident angles up to 7.5 degrees. Using precision tracking data, the spatial resolution, pointing accuracy, and angular reconstruction efficiency were characterized, correlating them with the prototype's design parameters. Furthermore, the impact of material alignment, layer staggering, and calibration strategies on the pointing performance were assessed. This talk presents an overview of the test beam setup, key findings, and implications for the detector design. The potential of the proposed concept to satisfy the SHiP requirements is demonstrated, paving the way for further optimization and a larger technological prototype.

Keywords: particle identification (PID); plastic scintillator; pointing; SHiP; future detectors