Karlsruhe 2011 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 104: Niederenergie-Neutrinophysik/Suche nach dunkler Materie I
T 104.9: Vortrag
Montag, 28. März 2011, 18:55–19:10, 30.95: 121
Development of an anti-Compton veto for HPGe detectors operated in liquid argon using Silicon Photo-Multipliers — •Jozsef Janicsko Csathy1,2, Hossein Aghaei Khozani1, Allen Caldwell1, Xiang Liu1,3, and Bela Majorovits1 — 1Max Planck Institute fuer Physik, Foeringer Ring 6, 80805 Munchen — 2Technise Universitat Munchen, Fakultaet fuer Physik, James-Franck-Strasse, 85748 Garching — 3Shanghai Jiaotong University, Donchuan Road 800, Minhang Shanghai 200240, China
A proof of concept detector is presented for scintillation light detection in liquid argon using Silicon Photo-Multipliers. The aim of the work is to build an anti-Compton veto for germanium detectors operated directly in liquid argon like in the GERDA experiment. Properties of the Multi-Pixel Photon Counter (MPPC) are studied at cryogenic temperatures. To increase the light collection efficiency of the MPPCs wavelength shifting fibers were used. A veto efficiency comparable to a similar setup with a Photo-Multiplier Tube was achieved.