Status of the EDELWEISS Experiment
Berge, L.; Berkes, I.; Chambon, B.; Chapellier, M.; Chardin, G.; Charvin, P.; De Jesus, M.; Di Stefano, P.; Drain, D.; Dumoulin, L.; Goldbach, C.; Juillard, A.; L'Hote, D.; Marnieros, S.; Miramonti, L.; Mosca, L.; Navick, X.-F.; Nollez, G.; Pari, P.; Pastor, C.; Pecourt, S.; Tourbot, R.; Yvon, D.1999
AbstractAbstract
[en] The status of the EDELWEISS experiment (underground dark matter search with heat-ionisation bolometers) is reviewed. Auspicious results achieved with a prototype 70 g Ge heat-ionisation detector under a 2 V reverse bias tension are discussed. Based on gamma and neutron calibrations, a best-case rejection factor, over the 15-45 keV range, of 99.7% for gammas, with an acceptance of 94% for neutrons, is presented first. Some operational results of physical interest obtained under poor low radioactivity conditions follow. They include a raw event rate of around 30 events/day/kg/keV over the same energy range, and, after rejection of part of the background, lead to a conservative upper limit on the signal of approximately 1.6 events/day/kg/keV at a 90% confidence level. Performance degrading surface effects of the detector are speculated upon; and planned upgrades are summarized
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TAUP 97: 5. international workshop on topics in astroparticle and underground physics; L'Aquilla (Italy); 7-11 Sep 1997; S0920563298003909; Copyright (c) 1999 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
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Journal Article
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Conference
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