SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 54: Flavor IV

T 54.5: Vortrag

Mittwoch, 22. März 2023, 16:50–17:05, HSZ/0304

Light Separation with the Topological Track Reconstruction in an idealised water-based liquid scintillator detector as study for Theia — Daniel Bick, Caren Hagner, and •Malte Stender — Universität Hamburg, Institut für Experimentalphysik

In neutrino physics, large unsegmented liquid scintillator or water Cherenkov detectors are often the tool of choice. Where the scintillation type excels in energy reconstruction, shower identification via the dE/dx and a low detection threshold, the water Cherenkov detectors perform very well in direction reconstruction, particle identification via the fuzziness of the Cherenkov rings and background reduction with the number of rings. Experiments like the proposed Theia plan to combine the detection capabilities of both detector types and use water-based liquid scintillator (WbLS) as active volume. In order to unlock the full potential of these new detectors, a successful separation of Cherenkov and scintillation photons is of vital importance.
The Cherenkov scintillation photon separation is the focus of this work. Different light separation algorithms are implemented and studied in the context of a simulated idealised WbLS detector, which has a maximum optical coverage of Large Area Picosecond Photodetectors. These photodetectors feature a good spatial resolution of ∼ 1 mm and an excellent time resolution of ∼ 0.1 ns compared to the few nanoseconds PMTs typically achieve.
This contribution introduces the detector simulation, discusses the used light separation algorithms including the Topological Track Reconstruction and shows first results.