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PERIMETER INSTITUTE RECORDED SEMINAR ARCHIVE

PIRSA:09060058  ( MP4 Medium Res , MP3 , PDF ) Which Format?
The PICASSO Dark Matter Search Experiment
Speaker(s): Ubi Wichoski
Abstract: The PICASSO experiment searches for cold dark matter through the direct detection of weakly interacting massive particles (WIMPs) via their spin-dependent interactions with fluorine at SNOLAB, Sudbury - ON, Canada. The detection principle is based on the superheated droplet technique; the detectors consist of a gel matrix with millions of droplets of superheated fluorocarbon (C4F10) dispersed in it. The previous phase of the experiment, which employed 1-litre detector modules (for a total of about 20g of active mass), ended in 2005. The present phase of the PICASSO experiment consists of 32 4.5-litre detector modules for a total of approximately 1,795 g of active mass. In this talk, I will give an overview of the experiment, discuss the progress in background mitigation, which includes improved purification and fabrication techniques, as well as a background discrimination technique that we have recently discovered.
Date: 12/06/2009 - 9:00 am
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