Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 72: Experimental techniques in astroparticle physics III
T 72.8: Talk
Wednesday, March 17, 2021, 17:45–18:00, Tv
Measurement of Cherenkov light in Water-based Liquid Scintillators — •Dorina Carolin Zundel, Michael Wurm, and Hans Theodor Josef Steiger — Johannes Gutenberg-Universität Mainz, Institute of Physics, Staudingerweg 7, 55128 Mainz
The SCHLYP detector (Scintillation Cherenkov Light Yield Prism) is a newly developed laboratory setup, used to distinguish between scintillation and Cherenkov light in (Water-based) liquid scintillator samples. The setup uses the geometrical advantages of a hollow prism as a detector, equipped with three ultra-fast photomultipliers (PMTs), on each side. The PMTs have a rise time of 1ns and a transit time spread of 200ps. The prism is filled with a scintillator based on a variety of novel solvents (e.g., LAB (Linear AlkylBenzene), DIN (di-isopropyl naphthalene)), on which photons from a close 137Cs source scatter. A fast scintillation detector based on an anorganic crystal or a plastic scintillator is placed at a distance to detect backscattered events. Due to the directionality of Cherenkov light, the two PMTs opposite to the source are able to detect Cherenkov and scintillation light, while the last PMT is only able to detect scintillation light. Analyzing the coincident events from all four PMTs, the amount of light detected by the PMTs facing the source is higher, which indicates a simultaneous detection of scintillation and Cherenkov light. In this talk the first setup and the analysis of measured data will be presented as well as a new and improved setup. This work is supported by the Bundesministerium für Bildung und Forschung (Verbundprojekt 05H2018: R&D Detectors and Scintillators).