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Wuppertal 2015 – scientific programme

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T: Fachverband Teilchenphysik

T 72: Niederenergie Neutrinophysik IV

T 72.5: Talk

Wednesday, March 11, 2015, 17:50–18:05, I.13.71 (HS 28)

A Calibration Source for SOX — •Stefan Weinz — Universität Mainz

Several anomalies in datasets of different short baseline reactor and radioactive source experiments indicate a lower νe(−) flux than expected. A prominent explanation of deviation is the hypothetical oscillation to one or more sterile neutrinos, which do not interact with the detectors.

SOX (Short distance neutrino Oscillations with BoreXino) is a radioactive source experiment starting in 2015 which is supposed to either confirm or discard the mentioned anomalies and therefore the existence of new physics. Due to the fact that SOX is in principle a νe(−) counting experiment, it is of crucial importance to have a precise estimate of the number of emitted νe(−) by the employed radioactive source (51Cr, 144Ce). This is accomplished by measuring the thermal power radiated by the source. For the calibration of the respective calorimeter a dummy source (mockup) producing heat by electrical power is built. The talk focuses on the experimental setup, limitations and current status of the calibration procedure.

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