Würzburg 2018 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 68: Neutrinophysik III

T 68.10: Vortrag

Mittwoch, 21. März 2018, 18:45–19:00, Z6 - SR 2.012

Vessel shape reconstruction for the SOX experiment — •Sebastian Rottenanger for the Borexino collaboration — Eberhard Karls Universität Tübingen, Auf der Morgenstelle 14, D-72076 Tübingen

The SOX (Short distance neutrino Oscillations with BoreXino) experiment will measure the energy spectrum and spatial distribution of anti-neutrino capture events from an artificial source, looking for a signature of sterile neutrinos in the eV-range. This ¹⁴⁴Ce-¹⁴⁴Pr source will be placed below the Borexino liquid-scintillator detector.
The thin inner nylon vessel containing the scintillator, changes its shape over time. To have the best possible sensitivity within the enlarged target volume this shape has to be well known. This can be achieved using an event data sample of background events, allowing a reconstruction of the vessel shape on a regular basis.
A method to perform a fit of the vessel shape is already in use and a new improved and more stable method is currently under development. Several background contributions are fitted simultaneously to the energy spectrum and spatial event distribution. The basic concept and first results will be presented in this talk.
This work is funded by the Deutsche Forschungsgemeinschaft.