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| {{technical|date=October 2012}} | |||
| '''ANAIS''' is a ] experiment designed to detect ]. ANAIS stands for ''Annual modulation with NAI ]s''. Its main goal is the direct detection of the dark matter through its ] off the target nuclei in a radiopure ] crystal. This dark matter signal should be annually modulated by the change in the relative velocity of ]-], a result of the rotation of the Earth around the Sun. | |||
| ANAIS is the scaled conclusion of feasibility studies carried out with different prototypes by the ] group at the ], Spain. The complete experiment will use more than one hundred of kg of ultrapure ]-] NaI (Tl) crystals. Data recording began at the end of October 2012 using 25 kg in two prototype detectors as the last step before launching the larger experiment.<ref>, J. Amaré et al., Journal of Physics (Conference Series) 375 (2012) 01202</ref><ref>. S. Cebrián et al., Astropart. Phys. 37 (2012) 6</ref> A third detector was installed in 2014<ref>{{Cite web |url=http://www.lsc-canfranc.es/en/component/content/article/15-news/246-new-ultrapure-detector-anais.html |title=Arrival of the New Ultrapure NaI (TI) Detector for ANAIS, LSC |access-date=2015-11-07 |archive-url=https://web.archive.org/web/20160304025227/http://www.lsc-canfranc.es/en/component/content/article/15-news/246-new-ultrapure-detector-anais.html |archive-date=2016-03-04 |url-status=dead }}</ref> showing a better radiopurity allowing the commissioning of the full experiment expected by mid-2016.<ref>{{Cite arXiv |eprint = 1508.07213|last1 = Amare|first1 = J|title = Status of the ANAIS Dark Matter Project at the Canfranc Underground Laboratory|last2 = Cebrian|first2 = S|last3 = Cuesta|first3 = C|last4 = Garcia|first4 = E|last5 = Martinez|first5 = M|last6 = Olivan|first6 = M. A|last7 = Ortigoza|first7 = Y|last8 = Ortiz de Solorzano|first8 = A|last9 = Pobes|first9 = C|last10 = Puimedon|first10 = J|last11 = Sarsa|first11 = M. L|last12 = Villar|first12 = J. A|last13 = Villar|first13 = P|class = physics.ins-det|year = 2015}}</ref> | |||
| ] and ],<ref> R.Bernabei et al. European Physical Journal C 56: 333, 2010</ref> experimental efforts performed at the ], accumulated more than thirteen annual cycles of data (also with NaI scintillators), obtaining a positive signal.<ref>.R.Bernabei et al. European Physical Journal C 67: 39, 2010</ref> Comparison of that result with negative results from other targets and experimental techniques is strongly model dependent. ANAIS (adopting the same target and technique that DAMA/LIBRA) appeared in the last roadmap of ApPEC<ref> {{webarchive |url=https://web.archive.org/web/20121213141219/http://www.aspera-eu.org/images/stories/roadmap/SAC-Roadmap-Nov-1-2011-final.pdf |date=December 13, 2012 }}</ref> (Astroparticle Physics European Coordination) to allow testing with an independent experimental set-up and in a model-independent way. | |||
| In 2021, ANAIS, after acquiring data for 3 years at the ] in Spain, has not seen evidence for annual modulation in 112.5 kg of NaI(Tl) crystals and is thus incompatible with ] and ].<ref> | |||
| {{cite journal | |||
| |last1=Amare |first1=J. | |||
| |display-authors=etal | |||
| |year=2021 | |||
| |title=Annual modulation results from three-year exposure of ANAIS-112 | |||
| |journal=Physical Review D | |||
| |volume=103 | |||
| |issue=10 | |||
| |page=102005 | |||
| |doi=10.1103/PhysRevD.103.102005 | |||
| |arxiv=2103.01175 | |||
| |bibcode=2021PhRvD.103j2005A | |||
| |s2cid=232092298 | |||
| }} | |||
| </ref> | |||
| ==References== | |||
| {{Reflist}} | |||
| ==External links== | |||
| * | |||
| * | |||
| {{Dark matter}} | |||
| ] | |||
| ] | |||
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