Darkside: A Depleted Argon Dark Matter Search

Alton, D.; Durben, Dan J.; Keeter, K. J.; Zehfus, Michael; Brice, S.; Chou, A.; Hall, J.; Jöstlein, H.; Pordes, S.; Sonnenschein, A.; Brodsky, J.

doi:10.2172/993872

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…The first physics detector in the DarkSide program, DarkSide-50, is currently being commissioned at LNGS. The DarkSide-50 TPC with underground LAr, strongly depleted in 39 Ar radioisotope, is coupled with a 4 m borated liquid scintillator neutron veto and a 10 m water muon veto, resulting in a detector system capable of achieving background-free operation in a 0.1 ton-year exposure [4]. Relevant design parameters for the light detection are also listed in table 1.…”

Section: Introduction To the Darkside Programmentioning

confidence: 99%

DarkSide search for dark matter

et al. 2013

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The DarkSide staged program utilizes a two-phase time projection chamber (TPC) with liquid argon as the target material for the scattering of dark matter particles. Efficient background reduction is achieved using low radioactivity underground argon as well as several experimental handles such as pulse shape, ratio of ionization over scintillation signal, 3D event reconstruction, and active neutron and muon vetos. The DarkSide-10 prototype detector has proven high scintillation light yield, which is a particularly important parameter as it sets the energy threshold for the pulse shape discrimination technique. The DarkSide-50 detector system, currently in commissioning phase at the Gran Sasso Underground Laboratory, will reach a sensitivity to dark matter spin-independent scattering cross section of 10−45 cm2 within 3 years of operation.

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Section: Introduction To the Darkside Programmentioning

confidence: 99%

DarkSide search for dark matter

et al. 2013

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“…The DarkSide-50 geometry will essentially consist of a cylindrical active volume with equal diameter and height, contained in a fused silica inner vessel, with arrays of QUPIDs on the flat top and bottom faces. The vessel and QUPIDs are immersed in a (passive) liquid argon buffer inside a titanium (or low background stainless steel) cryostat [22]. For the purposes of this discussion of veto efficiency, the important features of DarkSide-50 are the masses of the individual detector components.…”

Section: A Boron-loaded Scintillator Neutron Vetomentioning

confidence: 99%

A highly efficient neutron veto for dark matter experiments

Wright

Mosteiro

Loer

et al. 2011

Nuclear Instruments and Methods in Physics Research Section A:

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We present a conceptual design for an active neutron veto, based on boron-loaded liquid scintillator, for use in direct-detection dark matter experiments. The simulated efficiency of a 1 meter thick veto, after including the effects of neutron captures in the inner detector and inefficiencies due to feed-throughs into the veto, is greater than 99.5% for background events produced by radiogenic neutrons, while the background due to externally produced cosmogenic neutrons is reduced by more than 95%. The ability of the veto to both significantly suppress, and provide in situ measurements of, these two dominant sources of background would make the next generation of dark matter experiments much more robust, and dramatically improve the credibility of a dark matter detection claim based on the observation of a few recoil events. The veto would also allow direct extrapolation between the background-free operation of a small detector and the physics reach of a larger detector of similar construction.

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Darkside: A Depleted Argon Dark Matter Search

Cited by 2 publications

References 9 publications

DarkSide search for dark matter

DarkSide search for dark matter

A highly efficient neutron veto for dark matter experiments

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