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SEQUENCE:0
UID:UW-Physics-Event-2626
DTSTART:20120326T180000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T062359Z
LAST-MODIFIED:20120319T134641Z
LOCATION:4274 Chamberlin Hall
SUMMARY:The search for direct detection of Dark Matter with MiniCLEAN\
 , NPAC (Nuclear/Particle/Astro/Cosmo) Forum\, Raul Hennings-Yeomans\, 
 Los Alamos National Laboratory
DESCRIPTION:The particle nature of dark matter remains one of the bigg
 est challenges in Astroparticle physics today. The use of liquid noble
  elements as scintillators for direct detection of dark matter insingl
 e and dual phase configurations are one of the most promising techniqu
 es to reach sensitivities beyond 10$^{-44}$cm$^2$ in spin-independent 
 WIMP-nucleon cross section. MiniCLEAN (CLEAN- Cryogenic Low Energy Ast
 rophysics with Noble Gases) is an approximately spherical ~500~kg liqu
 id argon or neon vessel that encloses 92 optical cassettes (modular ph
 oto-detectors) pointing at the center of the sphere through a TPB (Tet
 raphenyl Butadine) evaporated window that converts VUV light from the 
 argon or neon scintillation into the visible. The modular spherical de
 sign allows both for a viable radon-mitigated assembly and for positio
 n reconstruction. Furthermore\, the use of Pulse-Shape discrimination 
 techniques between nuclear and electronic recoils that are particularl
 y good for these two condensed noble gases will test the single-phase 
 approach as a viable instrument for direct detection of dark matter at
  the multi-tonne scale with a projected sensitivity of 10$^{-46}$~cm$^
 2$ for a $sim$100~GeV/c$^2$ WIMP mass in terms of spin-independent WIM
 P-nucleon cross section. I will be presenting a review and status of t
 he MiniCLEAN research program as well as new developments in the mitig
 ation of depth-dependent and radiogenic neutron backgrounds.
URL:https://www.physics.wisc.edu/events/?id=2626
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