Status of the ANAIS experiment at Canfranc

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.

Dark Matter Particle Detection System SQUID - Magnetic Calorimeter

“…A neutron background can be suppressed by using the multiple scattering signature absent in the case of WIMPs. Generally speaking, the difficulty of direct experiments in the search for WIMPs is determined by the following factors: (a) a very small WIMP-nucleon scattering cross section ( [29], HDMS [30], time-projection chambers Drift [31] and MIMAC [32]; scintillation detectors -DAMA/LIBRA [33,34], NaIAD [35], ANAIS [36], Kamioka-CaF2 [37], KIMS [38], PICOLON [39], ZEPLIN [40]; cryogenic heat detectors -ROSEBUD [41], CRESST-I [42]; overheated droplet detectors and superconducting granule detectors -COUPP [43], PICASSO [44], SIMPLE [45], Orpheus [46]; combined light and heat detectors -CRESST-II [47]; combined heat and ionization detectors -CDMS [48], EDELWEISS [49]; combined light and ionization detectors -ZEPLIN-II [50], ZEPLIN-III [51], Xenon 10 [52], WARP [53], ArDM [54].…”

Aspects of spin-dependent dark matter search

“…2. The data are taken from experiments BRS, (NaI, 1992) [36,37], BPRS (CaF 2 , 1993) [38], EDELWEISS (sapphire, 1996) [39], DAMA (NAI, 1996) [40], DAMA (CaF 2 , 1999) [41,42], UKDMS (NaI, 1996) [43,44,45,46], ELEGANT (CaF 2 , 1998) [47], ELEGANT (NaI, 1999) [48,49], Tokio (LiF, 1999(LiF, , 2002 [50,51,52,53,54], SIMPLE (C 2 ClF 5 , 2001) [55], CRESST (Al 2 O 3 , 2002) [56], PICASSO (C n F m , 2002) [57], ANAIS (NaI, 2002) [58] and NAIAD (NaI, 2003) [59]. The current experimental situation for the spin-dependent WIMP-neutron cross section is given in Fig.…”

“…SD as a function of WIMP mass). The curves are obtained from [36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59].…”

“…2: Full set of currently available exclusion curves for spin-dependent WIMP-proton cross sections (σ pSD as a function of WIMP mass). The curves are obtained from[36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59].…”