| Thème(s) : |
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Physique/Astrophysique/Cosmologie et astrophysique extra-galactique
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| Titre : |
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Status of the EDELWEISS Experiment |
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| Auteur : |
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L. Bergé1, I. Berkes2, B. Chambon2, M. Chapellier, G. Chardin, P. Charvin, M. De Jésus2, P D. Stefano, D. Drain2, L. Dumoulin1, C. Goldbach, J.-P. Hadjout2, A. Juillard1, D. L'Hôte, S. Marnieros1, L. Miramonti, L. Mosca, X F. Navick, G. Nollez, P. Pari, C. Pastor2, S. Pécourt2, R. Tourbot, D. Yvon |
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| Laboratoire : |
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| Résumé : |
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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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| Collaboration/Projet : |
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EDELWEISS |
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| Type de publication : |
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Communications avec actes |
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Date de publication ou d'écriture : |
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1999 |
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Nom du périodique Titre de l'ouvrage : |
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Nuclear Physics B Proceedings Supplements |
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| Volume : |
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70 |
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| Page/Article : |
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69-73 |
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| Nom du colloque : |
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International Workshop on Topics in Astroparticle and Underground Physics (TAUP 97) 5 |
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| Ville du colloque : |
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Gran Sasso |
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| Pays du colloque : |
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Italie |
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| Date du colloque (début) : |
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07/09/1997 |
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| Date du colloque (fin) : |
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11/09/1997 |
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| Identifiant local : |
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DAPNIA-SPP-98-04 |
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| Commentaire : |
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Manoir |
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