Status of the EDELWEISS experiment

The status of the EDELWEISS experiment, installed in the Fréjus tunnel, is presented. In its first stage, the experiment uses a 70 g high purity Ge bolometer with heat-ionization discrimination. Based on physics data, gamma and neutron calibrations, the influence of inverse bias voltage (−2 and −6 V...

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Veröffentlicht in:	Physics reports 1998-12, Vol.307 (1), p.297-300
Hauptverfasser:	Drain, D., Benoit, A., Bergé, L., Berkes, I., Chambon, B., Chapellier, M., Chardin, G., Charvin, P., Jésus, M.De, Stefano, P.Di, Dumoulin, L., Goldbach, C., Hadjout, J.-P., Juilliard, A., L’Hôte, D., Mallet, J., Marnieros, S., Miramonti, L., Mosca, L., Navick, X.-F., Nollez, G., Pari, P., Pastor, C., Pécourt, S., Simon, E., Turbot, R., Vagneron, L., Yvon, D.
Format:	Artikel
Sprache:	eng
Schlagworte:	Astrophysics Cosmology and Extra-Galactic Astrophysics Physics
Online-Zugang:	Volltext
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Zusammenfassung:	The status of the EDELWEISS experiment, installed in the Fréjus tunnel, is presented. In its first stage, the experiment uses a 70 g high purity Ge bolometer with heat-ionization discrimination. Based on physics data, gamma and neutron calibrations, the influence of inverse bias voltage (−2 and −6 V) on incomplete surface charge collection, which limits at present the performances of these detectors, is presented. Analysing runs with a total exposure of 1.17 kg×day after cuts, an upper limit of 0.6 event day kg keV at 90% confidence level in the 12–70 keV recoil energy interval is obtained. Planned upgrades are summarized.
ISSN:	0370-1573 1873-6270
DOI:	10.1016/S0370-1573(98)00075-1