XXth International Conference on Neutrino Physics and Astrophysics
M.L.Sarsa Sarsa
Cryogenic Detection Techniques at the
Canfranc Underground Laboratory: The ROSEBUD Experiment
The ROSEBUD (Rare Object SEarch with Bolometers UnDerground)
Experiment main goal has been the development of cryogenic
techniques to be applied in the search for dark matter. Since
1999, in the frame of the ROSEBUD collaboration, different
absorber materials have been tested in a small cryogenic
installation at the Canfranc Underground Laboratory. Measurements
with sapphire (Al_2 O_3), lithium fluoride (LiF), germanium
(Ge) and calcium tungstate (CaWO_4) have been carried out and a
new one, including BGO as absorber (already tested in Paris) is
in preparation. The disposal of such a variety of materials (used
in the same mounting with identical environmental conditions)
allow us to think in a possible future discrimination based on
the target dependence (A, Z, spin content) of the dark matter signal. In
parallel, the development of simultaneous recollection of light
and phonons in order to discriminate electron/nuclear recoils is
in progress. The first results obtained in Canfranc will be shown.