4-8 August 2015
America/Detroit timezone

Commissioning Data Results for the DEAP-3600 Dark Matter Experiment

7 Aug 2015, 16:18
18m
Michigan (Michigan League)

Michigan

Michigan League

Cosmology and Dark Matter Experiment AstroParticle, Cosmology, Dark Matter Searches, and CMB

Speaker

Bei Cai (Queen's University)

Description

The DEAP-3600 experiment uses 3.6 tons of liquid argon for a sensitive dark matter search, with a sensitivity to the spin-independent WIMP-nucleon cross-section of 10^{-46} cm^2 at 100 GeV WIMP mass. This high sensitivity is achievable due to the large target mass and the very low backgrounds in the spherical acrylic detector design as well as at the unique SNOLAB facility in Sudbury, Canada. The liquid argon target is enclosed in an ultra pure acrylic vessel. 255 high efficiency photomultiplier tubes collecting scintillation light are separated from the argon through acrylic light guides and polyethylene filler blocks, providing neutron shielding and thermal insulation. Pulse shape discrimination is used to reject electromagnetic backgrounds from the WIMP induced nuclear recoil signal. We started taking commissioning data in February 2015 with vacuum and later gas inside the detector. Liquid argon fill is expected in mid 2015. In this talk we will present results from analysis of the commissioning data.
Oral or Poster Presentation Oral

Primary author

Bei Cai (Queen's University)

Presentation Materials