Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 29: Detectors III (Scintillators)

T 29.3: Vortrag

Dienstag, 1. April 2025, 16:45–17:00, VG 1.102

Construction and operation of a scintillation detector with full waveform analysis for spatial resolution enhancement. — •Erik Ehlert, Dmitry Eliseev, Markus Merschmeyer, Thomas Hebbeker, and Alexander Schmidt — III. Physikalisches Institut A, RWTH Aachen University

Increasing the resolution in large area scintillation detectors usually demands a higher number of readout channels. In order to study ways of increasing spatial resolution for fewer readout channels, a setup of two detectors, a reference and large scintillaton tile, was developed. In addition, to demonstrate the plausibility of the concept, a Geant4 simulation of the entire detector setup was performed.

The reference detector consists of two layers of arrays of scintillator strips coupled to pairs of silicon photomultipliers (SiPMs). This detector is used to provide reference measurements for the single scintillator tile. The tile is read out by only four SiPMs. The signals from the reference and tile detector are digitized by an FPGA-based setup developed in-house. With the information about the exact hit position and the full SiPM-waveform data, an analysis for enhancing the spatial resolution was set up.

The talk provides an overview of the entire detector setup, simulation, analysis, and will showcase the achieved enhancement in spatial resolution.

Keywords: SiPM; FPGA; Scintillation detector; Geant4