Surface backgrounds in the DEAP-3600 dark matter experiment

Journal Article · Wed Apr 27 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3579572· OSTI ID:21513196

Cai, B; Boulay, M; Pollmann, T ^[1]; Cleveland, B ^[2]

---

1. Department of Physics, Queen's University, Kingston, ON K7L 3N6 (Canada)
2. Department of Physics and Astronomy, Laurentian University, Sudbury, Ontario, P3E 2C6, and SNOLAB, Lively, Ontario, P3Y 1M3 (Canada)

DEAP-3600 is a dark matter experiment using 3.6 tons of liquid argon to search for Weakly Interacting Massive Particles (WIMPs), with a target sensitivity to the spin-independent WIMP-nucleon cross-section of 10{sup -46} cm{sup 2}. The detector is designed to allow for a three year background-free run with a 1-ton fiducial volume. We identify in this paper the potential sources of surface contamination. We require {sup 238}U and {sup 232}Th contaminations on the order of 10{sup -12} g/g or less, a level achieved by the SNO experiment, and {sup 210}Pb not significantly out of equilibrium with {sup 238}U, i.e., 10{sup -20} g/g or less {sup 210}Pb in the acrylic vessel or TPB wavelength shifter, which should be achievable with appropriate control of exposure to radon.

• OSTI ID: 21513196
• Journal Information: AIP Conference Proceedings, Vol. 1338, Issue 1; Conference: LRT-2010: Topical workshop on low radioactivity techniques, Sudbury (Canada), 28-29 Aug 2010; Other Information: DOI: 10.1063/1.3579572; (c) 2011 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY
ARGON
CROSS SECTIONS
LEAD 210
LIQUIDS
NONLUMINOUS MATTER
NUCLEONS
PHOTOMULTIPLIERS
RADON
SENSITIVITY
SPIN
SURFACE CONTAMINATION
SURFACES
THORIUM 232
URANIUM 238
WAVELENGTHS
WEAK INTERACTIONS
ACTINIDE NUCLEI
ALPHA DECAY RADIOISOTOPES
ANGULAR MOMENTUM
BARYONS
BASIC INTERACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CONTAMINATION
DECAY
ELEMENTARY PARTICLES
ELEMENTS
EVEN-EVEN NUCLEI
FERMIONS
FLUIDS
GASES
HADRONS
HEAVY NUCLEI
INTERACTIONS
ISOTOPES
LEAD ISOTOPES
MATTER
NONMETALS
NUCLEAR DECAY
NUCLEI
PARTICLE PROPERTIES
PHOTOTUBES
RADIOISOTOPES
RARE GASES
SPONTANEOUS FISSION RADIOISOTOPES
THORIUM ISOTOPES
URANIUM ISOTOPES
YEARS LIVING RADIOISOTOPES