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T: Fachverband Teilchenphysik

T 80: Neutrinophysik 6 (Szintillatorexperimente)

T 80.3: Vortrag

Mittwoch, 29. März 2017, 17:25–17:40, H 2

Status of the PALM Experiment for JUNO — •Sabrina Prummer¹, Julia Sawatzki¹, Lothar Oberauer¹, Andreas Ulrich², Hans Steiger¹, Mario Schwarz¹, and Philipp Landgraf¹ — ¹TU München, E15, Physik-Dep, Garching — ²TU München, E12, Physik-Dep, Garching

Status Update of the Precision Attenuation Length Measurement Setup

The planned JUNO detector is a 20kt liquid scintillator neutrino detector. Its primary goal is the determination of the neutrino mass hierarchy. This will be done by precision measurements of the reactor antineutrino survival probability. Due to the spherical detector's diameter of approx. 35.5 m, the optical parameters, especially the attenuation length, of the scintillator have to be known precisely and have to be very good to achieve the required energy resolution of 3%@1MeV. To determine one of the crucial optical parameters, the attenuation length, a new spectrometer experiment, called PALM, was built. Unless the commercially available spectrometers with light paths up to 10 cm, this spectrometer is able to measure light paths up to 2.8 m through the medium, making it possible to determine the attenuation length very precisely. This talk will give a status update on the commissioned PALM setup. This work is supported by the DFG cluster of excellence "Origin and Structure of the Universe"(www.universe-cluster.de), the DFG research unit "JUNO" and the Maier-Leibniz-Laboratorium.