Hamburg 2016 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 60: Niederenergie-Neutrinophysik I
T 60.3: Vortrag
Dienstag, 1. März 2016, 17:20–17:35, VMP9 SR 07
Performance of a high-precision calorimeter for the measurement of the antineutrino-source strength in the SOX experiment — •Konrad Altenmüller for the BOREXINO collaboration — Technische Universität München
A calorimeter was developed to measure the thermal power and thus the antineutrino-generation rate of a 144Ce – 144Pr antineutrino-source with <1% overall accuracy for the SOX experiment. SOX is searching for neutrino oscillations at short baselines with the Borexino detector to investigate the existence of eV-scale sterile neutrinos. The calorimeter design is based on a copper heat exchanger with integrated water lines for the heat extraction, mounted around the source. A high precision measurement is possible thanks to an elaborate thermal insulation.
In this talk, the design of the calorimeter is reviewed and results of calibration measurements are presented. The thermal insulation of the system was examined and heat losses were quantified. The methods to reconstruct the source power and the decay rate from measurements are described.
This work is supported by the DFG cluster of excellence “Origin and Structure of the Universe”