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Cryogenic Ge detectors for dark matter search: Surface event rejection with ionization signals

X. Defay 1 A. Broniatowski 2 A. Juillard S. Marnieros 2 M. Chapellier 2 L. Dumoulin 2 S. Collin 2 L. Berge 2 F. Lalu 2 X. F. Navick
1 CSNSM PS1
CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière, CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Abstract : A new design of an ionization-heat germanium detector for dark matter search is presented, based on the use of interleaved electrodes for charge collection. This device allows active rejection of surface events by performing the appropriate cuts in the charge measurement data. Test experiments were performed with a prototype device, fitted with annular collection electrodes and with a neutron transmutation-doped Ge thermometer. Calibration runs with gamma and neutron sources demonstrate the remarkable possibilities offered by this type of detector in terms of surface event discrimination.
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http://hal.in2p3.fr/in2p3-00825400
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Submitted on : Thursday, May 23, 2013 - 4:06:38 PM
Last modification on : Wednesday, September 16, 2020 - 5:40:19 PM

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X. Defay, A. Broniatowski, A. Juillard, S. Marnieros, M. Chapellier, et al.. Cryogenic Ge detectors for dark matter search: Surface event rejection with ionization signals. Journal of Low Temperature Physics, Springer Verlag (Germany), 2008, 151, pp.896-901. ⟨10.1007/s10909-008-9762-1⟩. ⟨in2p3-00825400⟩

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