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T: Fachverband Teilchenphysik

T 92: Neutrino physics without accelerators VIII

T 92.7: Vortrag

Freitag, 3. April 2020, 12:30–12:45, H-HS II

Development of novel Water based Liquid Scintillators for the THEIA Neutrino Experiment — Hans Theodor Josef Steiger¹, Lothar Oberauer¹, •Andreas Steiger¹, Matthias Raphael Stock¹, Daniele Guffanti², and Michael Wurm² — ¹Technische Universität München (TUM), Physik-Department, James-Franck-Straße 1, 85748 Garching bei München — ²Institute of Physics and Excellence Cluster PRISMA, Johannes Gutenberg-Universität (JGU) Mainz, 55099 Mainz

New developments in liquid scintillators, high-efficiency, fast photon detectors, and chromatic photon sorting have opened up the possibility for building a large-scale (up to 100 kt) neutrino detector called THEIA that is planned to be able to discriminate between Cherenkov and scintillation signals. Currently Water-based Liquid Scintillator (WbLS) is a potential candidate for this type of detector. By introducing a small amount (typically 1%-10%) of organic liquid scintillator by the use of surfactants into water, the liquid yield can be adjusted to allow detection of particles below Cherenkov threshold while not sacrificing directional capability. Typically, such mixtures can be considered to be cheaper than organic scintillators and to be less hazardous for the environment. In this talk some new WbLS cocktails (developed at TUM and JGU) and the techniques for their production as well as selected properties of the mixtures are discussed. This work is supported by the Bundesministerium für Bildung und Forschung (BMBF) in the frame of the Verbundprojekt 05H2018, the Excellence Cluster PRISMA+ and the Maier-Leibnitz-Laboratorium (MLL).