Karlsruhe 2011 – scientific programme

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T: Fachverband Teilchenphysik

T 110: Experimentelle Techniken der Astroteilchenphysik II

T 110.6: Talk

Tuesday, March 29, 2011, 18:05–18:20, 30.95: 001

Optimization of a fluorescence x-ray source and background studies for a prospective CNNS experiment — •Andreas Zöller¹, Christian Ciemniak¹, Franz von Feilitzsch¹, Achim Gütlein¹, Nils Haag¹, Martin Hofmann¹, Christian Isaila¹, Tobias Lachenmaier², Jean-Côme Lanfranchi¹, Lothar Oberauer¹, Sebastian Pfister¹, Walter Potzel¹, Sabine Roth¹, Stefan Schönert¹, Moritz von Sivers¹, and Raimund Strauß¹ — ¹Technische Universität München, Physik Department, E15 — ²Eberhard Karls Universität Tübingen

Coherent Neutrino Nucleus Scattering (CNNS) is predicted by the Standard Model but hasn’t been measured yet. A good background discrimination and shielding is essential for the achievement of a prospective experiment. We show the results of simulations for background discrimination and suppression using a myon veto system in combination with a shielding around a cryostat.

With CNNS, the expected nuclear recoil energy for reactor anti-neutrinos is in the range of ≲ 4 keV. Thus a calibration source within this energy region is necessary. Two different methods to create fluorescence will be discussed and measured energy spectra will be shown. Finally results of an improved fluorescence x-ray source with nine clearly separated energy lines between ∼1 keV and 6.5 keV will be shown.

This work has been supported by funds of the Deutsche Forschungsgemeinschaft DFG (Transregio 27: Neutrinos and Beyond), the Excellence Cluster (Origin and Structure of the Universe) and the Maier-Leibnitz-Laboratorium (Garching).