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11th International Workshop on Low Temperature Detectors - LTD-11, Tokyo : Japon
Development of Ge/NbSi detectors for EDELWEISS-II with identification of near-surface events
A. Juillard1, S. Marnieros1, Y. Dolgorouky1, L. Bergé1, S. Collin1, S. Fiorucci, F. Lalu1, L. Dumoulin1
EDELWEISS Collaboration(s)
(2006)

The actual limitation of Ge ionization heat cryogenic detectors for direct WIMP detection such as EDELWEISS arises from incomplete charge collection for near-surface events. We present results on Ge/NbSi detectors that are fitted with segmented electrodes and two NbSi Anderson insulator thermometric layers. Three such bolometers were studied in the low-background cryostat of the EDELWEISS collaboration in the LSM: analysis of the athermal signals allows us to identify and reject events occurring in the first millimeter under the electrodes.
1 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Physique/Astrophysique/Cosmologie et astrophysique extra-galactique

Planète et Univers/Astrophysique

Physique/Physique/Instrumentations et Détecteurs
Dark matter – WIMPs – Surface events – Bolometers – Anderson insulators