First Results of the Edelweiss Experiment

Details First Results of the Edelweiss Experiment First Results of the Edelweiss Experiment

Dec 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.275c&link_type=abstract

Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:

Astronomy and Astrophysics

Astrophysics

Scientific paper

The status of the EDELWEISS experiment, installed in the Frejus tunnel, is presented. A test experiment has been performed using a 70 g high purity Ge bolometer with heat-ionization discrimination. Based on gamma and neutron calibrations and analyzing physics data runs with a total exposure of 1.17 kg x day after cuts, an upper limit of 0.6 event/day/kg/keV at 90 percent confidence level in the 15-70 keV recoil energy interval is obtained. The influence of inverse bias voltage (-2 V and - -6V) on incomplete surface charge collection, which limits at present the performances of these detectors, is presented. Planned upgrades are summarized.

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