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STScI Webcast

2011 Spring Symposium

An Update on COUPP and CoGeNT

Presented by: Juan Collar (University of Chicago)
Category: Science Symposium   Duration: 30 minutes   Broadcast date: May 05, 2011
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COUPP employs bubble chambers to look for medium to heavy mass Weakly Interacting Massive Particles (WIMPs). This technique offers the best intrinsic rejection against minimum ionizing backgrounds available to any dark matter detector. Very recently, an additional acoustic rejection of alpha-induced bubbles has been demonstrated. As a result of this, we expect COUPP to become one of the most sensitive dark matter detectors for both spin-dependent and -independent WIMP-nucleus couplings during 2011, following the installation of two chambers at SNOlab. CoGeNT uses P-type Point Contact (PPC) germanium detectors and is designed to look for light WIMP candidates below ~10 GeV in rest mass. We'll discuss a new approach to reject surface events in PPCs, and some "interesting" irreducible backgrounds observed during their deep underground operation, as well as future plans.