Summary: The experimental search of dark matter is one of the central problems in the physics of astropartículas. In today modelocosmológico standard, the 25% of the densidad.de matter and energy of the universe is in the form of dark matter not bariónica. Unosde candidates most interesting part of this type of material are WIMPs (Weakly interactive massive particles) queaparecen so natural extensions of the Standard Model of supersymmetric particles. These models predict unosritmos interaction for these particles in the area that are beginning to be accessible to experiments actuales.Desde
1999 an experiment Italian notes in its figures a signal characteristic of these particles (modulation in the annual rate of detection) which leads to the existence of WIMPs with certain parameters. Experiments like CDMS, lasensibilidad to explore this region of parameter space apparently have excluded these candidates. The incertidumbresteóricas are great, so we need an experiment with the same técinica and materials that the Italian experiment. Esees the role reserved for the experiment ANAIS that the group of nuclear physics and astropartículas of the University of Zaragoza esperamontar in the underground laboratory of Canfranc.Este experiment will consist of 10 crystals centelleadores NaI (Tl) with a total mass of 100kg. To ensure sensibilidadnecesaria, it is necessary to properly optimize the benefits of these detectors on the merits radioactive and respect alumbral of detección.En this work reflects the research and development over the past four years have been developed in this regard, on the one hand with the construction of a prototype, and another with simulations and theoretical analysis that have made unamejora substantial sensitivity for detecting low energy and open the possibility of obtaining thresholds deteccióncercanos to keV.
