Bonn 2010 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 107: Niederenergie-Neutrinophysik und Suche nach dunkler Materie I

T 107.9: Vortrag

Montag, 15. März 2010, 18:55–19:10, HG XI

Low-Temperature Setup for Quenching-Factor Measurements of CaWO₄ with Neutrons — Christian Ciemniak¹, •Chiara Coppi¹, Franz von Feilitzsch¹, Achim Gütlein¹, Christian Isaila¹, Jean-Côme Lanfranchi¹, Sebastian Pfister¹, Walter Potzel¹, Sabine Roth¹, Moritz von Sivers¹, Raimund Strauss¹, and Wolfgang Westphal^1,2 — ¹Technische Universität München, Physik-Department E15, James- Franck-Str. — ²Deceased

CRESST is an experiment for the direct detection of dark matter (WIMPs) via nuclear recoil measurements on a CaWO4 crystal. Different quenching factors for the nuclei allow the discrimination between background and a possible signal. To measure the quenching factors at low temperatures, a neutron scattering facility has been set up at the Maier-Leibnitz-Laboratorium in Garching. In 2007 a cryostat was installed and first measurements were performed. For further optimization and to allow flight-time measurements at a fixed scattering angle, the complete data-acquisition hardware and software has been updated. We report on first results and ongoing upgrades.

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