First results of the ROSEBUD dark matter experiment

Cebrian, S Coron, N Dambier, G Garcia, E Gonzalez, D Irastorza, IG Leblanc, J de Marcillac, P Morales, A Morales, J de Solorzano, AO Peruzzi, A Puimedon, J Sarsa, ML Scopel, S Villar, JA

S. Cebrian et al., First results of the ROSEBUD dark matter experiment, ASTROPART P, 15(1), 2001, pp. 79-85

23

INGLESE

Article

Space Sciences

ASTROPARTICLE PHYSICS

0927-6505 → ACNP

15

1

2001

79 - 85

ISI

0927-6505(200103)15:1<79:FROTRD>2.0.ZU;2-6

ROSEBUD (Rare Objects SEarch with Bolometers UndergrounD) is an experiment which attempts to detect low mass weak interacting massive particles throug h 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 dil ution refrigerator operating at 20 mK in the Canfranc Underground Laborator y. We report in this paper the results of several runs (of about 10 days ea ch) with successively improved energy thresholds, and the progressive backg round reduction obtained by improvement of the radiopurity of the component s and subsequent modifications in the experimental assembly, including the addition of old lead shields. Mid-term plans and perspectives of the experi ment are also presented. (C) 2001 Elsevier Science B.V. All rights reserved .