Status of the ANAIS experiment at Canfranc

/ Authors

S. Cebrián, J. Amare, J. Carmona, E. García, I. Irastorza, G. Luzón, A. Morales, J. Morales, A. Solórzano, J. Puimedón

and 2 more authors

/ Abstract

Abstract The present status of the ANAIS experiment (Annual Modulation with NaI's) is shown. ANAIS is intended to use more than 100 kg of NaI(Tl) in the Canfranc Underground Laboratory (Spain) searching for seasonal modulation effects in the WIMP signal; in a first stage, a prototype (one single 10.7 kg crystal) has been developed in order to obtain the best conditions regarding the energy threshold and the radioactive background in the low energy region as well as to check the stability of the environmental conditions. The first results corresponding to an exposure of 2069.85 kg day show an average background level of 1.2 counts/(keV kg day) from threshold ( E thr ∼ 4 keV, even using one single photomultiplier) up to 10 keV.

DOI: 10.1016/S0920-5632(02)01898-4