Mainz 2012 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 40: Astroteilchenphysik
HK 40.5: Talk
Thursday, March 22, 2012, 18:00–18:15, RW 3
Measuring optical properties of LAr in GERDA — •Björn Scholz — TU Dresden, Germany
The GERDA experiment is attempting to measure neutrinoless double beta decay by using Germanium semiconductor detectors which are deployed naked in a volume of liquid Argon (LAr), which acts both as cryogenic cooling and background shield. The experiment recently started its first phase with eight enriched 76Ge detectors and is aiming to test the claims from parts of the Heidelberg Moscow Collaboration. The experiment is now exploring the possibility for instrumenting the LAr as an active veto using the scintillation light produced from energy deposition of background events. In order to optimize the veto design, an accurate knowledge of the LAr optical properties has to be achieved for the specific composition used in GERDA, as these are strongly affected by impurities.
This talk will cover the steps taken in the design of a method to perform the measurement of the LAr properties in GERDA, with particular emphasis on the in-situ measurement of the LAr attenuation length and light yield.
This talk is funded by the BMBF.