Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 39: Detectors 4 (calorimeters)

T 39.3: Talk

Tuesday, March 5, 2024, 16:30–16:45, Geb. 30.23: 2/1

Neutron and Gamma Particle Identification in Compact Plastic Scintillators — •Sebastian Ritter — Johannes-Gutenberg Universität, Mainz

Particle identification (PID) using pulse shape discrimination (PSD) is a commonly used concept in scintillation detectors to differentiate between gammas and neutrons. Considering highly granular plastic scintillator based calorimeters in development, performing this separation on signals with increasingly small photon statistics constitutes a real challenge.

This setup features small 30x30x3mm scintillator tiles readout by small SiPMs representing a proven readout concept for a large-scale calorimeter. Coincidence gamma and neutron emissions from an AmBe source are used for tagging. In addition, the setup includes cosmic tagging which allows for the identification and rejection of the permanent cosmic background.

To show the feasibility of such an analysis the late light single photon peaks are extracted from the data using different methods such as peak counting and integration and comparing them to the initial signal peak.

This technology could be used in various future detectors to provide tagging information and energy reconstruction for neutrons.

Keywords: particle identification (PID); plastic scintillator; neutron tagging; pulse shape discrimination (PSD); future detectors