First results of the ROSEBUD Dark Matter experiment

Details First results of the ROSEBUD Dark Matter experiment First results of the ROSEBUD Dark Matter experiment

2000-04-20

arxiv.org/abs/astro-ph/0004292v1

Astropart.Phys.15:79-85,2001

Astronomy and Astrophysics

Astrophysics

14 pages, 8 figures, submitted to Astroparticle Physics

Scientific paper

10.1016/S0927-6505(00)00138-9

Rare Objects SEarch with Bolometers UndergrounD) is an experiment which attempts to detect low mass Weak Interacting Massive Particles (WIMPs) through their elastic scattering off Al and O nuclei. It consists of three small sapphire bolometers (of a total mass of 100 g) with NTD-Ge sensors in a dilution refrigerator operating at 20 mK in the Canfranc Underground Laboratory. We report in this paper the results of several runs (of about 10 days each) with successively improved energy thresholds, and the progressive background reduction obtained by improvement of the radiopurity of the components and subsequent modifications in the experimental assembly, including the addition of old lead shields. Mid-term plans and perspectives of the experiment are also presented.

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