Abstract
The Germanium Detector Array ( Gerda) for the search of neutrinoless β β decays of 76Ge at LNGS will operate bare germanium diodes enriched in 76Ge in an (optional active) cryogenic fluid shield to investigate neutrinoless β β decay with a sensitivity of T 1 / 2 > 2 × 10 26 y after an exposure of 100 kg y. Recent progress includes the installation of the first underground infrastructures at Gran Sasso, the completion of the enrichment of 37.5 kg of germanium material for detector construction, the prototyping of the low-mass detector support and contacts, the front-end and DAQ electronics, as well as the preparation for construction of the cryogenic vessel and water tank.
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