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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3393
DTSTART:20141205T213000Z
DTEND:20141205T223000Z
DTSTAMP:20260419T161243Z
LAST-MODIFIED:20141020T184040Z
LOCATION:2241 Chamberlin Hall (coffee at 4:30 pm)
SUMMARY:Deep\, Dark Detection: the DEAP-3600 Dark Matter Experiment\, 
 Physics Department Colloquium\, Art McDonald\, SNOLAB
DESCRIPTION:A wide variety of astronomical observations appear to indi
 cate the existence of Dark Matter particles making up about 25% of the
  Universe. However\, to date there has been no conclusive direct obser
 vation of these particles. The DEAP-3600 Dark Matter Detector will use
  3600 kg of liquid argon for a sensitive search for Weakly Interacting
  Massive Particles (WIMPS) 2 km underground in the SNOLAB internationa
 l laboratory near Sudbury\, Canada. Pulse shape discrimination in the 
 light output will be used to avoid radioactive background from 39Ar be
 ta decay in the liquid argon. Great care in the control of local radio
 activity and the reduction in cosmic ray background due to the great d
 epth will enable the use of an almost background-free fiducial volume 
 of 1000 kg. This will provide a sensitivity of about 10-46 cm2 for 100
  GeV WIMPS after 3 years of operation\, beginning early in 2015. This 
 is substantially better than current limits for the spin-dependent int
 eraction. Details of the detector and its construction status will be 
 presented.
URL:https://www.physics.wisc.edu/events/?id=3393
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