Speaker
Miguel Ángel Olivan
(Universidad de Zaragoza)
Description
The ANAIS (Annual Modulation with NaI(Tl) Scintillators) experiment aims at the confirmation of the DAMA/LIBRA signal using the same target and technique at the Canfranc Underground Laboratory. Two NaI(Tl) crystals of 12.5 kg each, grown by Alpha Spectra from a powder having a potassium level under the limit of the analytical techniques, form the ANAIS-25 set-up. A detailed analysis of ANAIS-25 data will be presented: MC simulations reproduce very satisfactorily the measured background, effective threshold at 1 keVee is at reach, robust PMT noise filtering protocols have been developed, the bulk content in the crystals of potassium as well as of uranium and thorium radioactive chains has been quantified and cosmogenic activation of NaI(Tl) has been evaluated for the first time. Very preliminary results of a new 12.5 kg NaI(Tl) detector, received at LSC in the first week of March 2015, and installed together with the two previous modules forming the ANAIS37 set-up, will be presented. Finally, background prospects and expected sensitivity for the set-up with 250 kg will be shown and the status of the full ANAIS experiment will be reviewed.
Primary author
Dr
Susana Cebrian
(University of Zaragoza)
