München 2006 – wissenschaftliches Programm

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HK: Physik der Hadronen und Kerne

HK 12: Kern- und Teilchen-Astrophysik

HK 12.6: Vortrag

Montag, 20. März 2006, 18:15–18:30, E

Test facilities for the GERDA experiment — •Xiang Liu, Iris Abt, Michael Altmann, Allen Caldwell, Kevin Kröninger, Bela Majorovits, and Franz Stelzer — Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Föhringer Ring 6, D-80805 München

The GERDA (Germanium Detector Array) experiment is designed to search for neutrinoless double-beta decay in ⁷⁶Ge. Germanium detectors enriched in ⁷⁶Ge will be submerged in pure liquid nitrogen or argon. The cryogenic liquid is used to cool the detectors as well as to shield against external radiation. Several test facilities are currently under construction at MPI Munich. Prototype detectors are tested in conditions close to the experimental setup of GERDA. The experience is used to finalize the design of the suspension and cabling system as well as to verify the germanium detector technology. Detector parameters are also determined in a specialized vacuum teststand. These include thicknesses of dead layers, pulse-shape variables and segment properties.