ANAIS: Status and prospects
ANAIS experiment will look for dark matter annual modulation with large mass of ultra-pure NaI(Tl) scintillators at the Canfranc Underground Laboratory (LSC), aiming to confirm the DAMA/LIBRA positive signal in a model-independent way. Two 12.5 kg each NaI(Tl) crystals provided by Alpha Spectra are...
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Main Authors | , , , , , , , , , , , , , |
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Format | Journal Article |
Language | English |
Published |
31.12.2014
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Subjects | |
Online Access | Get full text |
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Summary: | ANAIS experiment will look for dark matter annual modulation with large mass
of ultra-pure NaI(Tl) scintillators at the Canfranc Underground Laboratory
(LSC), aiming to confirm the DAMA/LIBRA positive signal in a model-independent
way. Two 12.5 kg each NaI(Tl) crystals provided by Alpha Spectra are currently
taking data at the LSC. Present status of ANAIS detectors background and
general performance is summarized; in particular, thanks to the high light
collection efficiency prospects of lowering the threshold down to 1 keVee are
reachable. Crystal radiopurity goals are fulfilled for $^{232}$Th and $^{238}$U
chains and $^{40}$K activity, although higher than original goal, could be
accepted; however, high $^{210}$Pb contamination out-of-equilibrium has been
identified. More radiopure detectors are being built by Alpha Spectra. The
ongoing high quantum efficiency PMT tests and muon veto characterization are
also presented. Finally, the sensitivity of the experiment for the annual
modulation in the WIMP signal, assuming the already achieved threshold and
background in ANAIS-25 is shown. Further improvement should be achieved by
reducing both threshold and background, as expected. |
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DOI: | 10.48550/arxiv.1501.00104 |