Cryogenic germanium detectors for dark matter search: Surface events rejection by charge measurements

A. Broniatowski (1) , B. Censier (1) , A. Juillard (1) , L. Bergé (1)

1 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

Test experiments have been performed on a Ge detector of the Edelweiss collaboration, combining time-resolved acquisition of the ionization signals with heat measurements. Pulse-shape analysis of the charge signals demonstrates the capability to reject surface events of poor charge collection with energies larger than 50 keV in ionization.

Mots clés: Dark matter; Cryogenic Ge detector; Bolometer; Pulse-shape analysis; Event localization; Dead layer

Domaines: Instrumentations et Détecteurs [physics.ins-det]

A. Broniatowski, B. Censier, A. Juillard, L. Bergé. Cryogenic germanium detectors for dark matter search: Surface events rejection by charge measurements. 11th International Workshop on Low Temperature Detectors - LTD-11, Jul 2005, Tokyo, Japan. pp.378-380, ⟨10.1016/j.nima.2005.12.015⟩. ⟨in2p3-00068783⟩