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Characterization of Pulse–Shape Discrimination for Background Reduction in the DEAP-1 Detector
(2009-02-02)
DEAP (Dark Matter Experiment with Argon and Pulse Shape Discrimination) is
an experiment that aims to directly detect dark matter particles via nuclear recoils
in liquid argon. The experiment uses the scintillation ...
Detector Development and Test Facility Commissioning for SuperCDMS
(2011-06-06)
SuperCDMS, the next stage of the Cryogenic Dark Matter Search (CDMS), uses cylindrical germa-
nium crystals as particle detectors to measure phonon and ionization signals resulting from particle
interactions. The aim of ...
Gamma Calibration Using A New Test Apparatus At Queen’s University And Optimization Analyses For The PICASSO Experiment
(2009-09-26)
The PICASSO experiment located 2 km underground in SNOLAB is directly
searching for dark matter signals by looking for interactions between dark matter
particles and an active target made of superheated droplets of freon ...
Calibration of Infrared Photons in Cryogenic Germanium Detectors
A significant evidence from galaxies and astrophysical observations, suggests that ~ 85% of the matter in our Universe is invisible matter. The observations of the so-called “dark matter” suggest that it consists of ...
Alpha backgrounds in the DEAP dark matter search experiment.
(2012-08-10)
One of the pressing concerns in Dark Matter detection experiments is ensuring that the potential signal from exceedingly rare Dark Matter interactions is not obscured by background from interactions with more common ...
On the Development of the Wavelength Shifter Deposition System for the DEAP-3600 Dark Matter Search Experiment
(2015-11-03)
The DEAP-3600 dark matter search experiment uses 3600 kilograms of liquid argon as a target medium contained in a spherical acrylic vessel. Particle interactions in liquid argon produce vacuum ultraviolet light at a peak ...
Rejecting Outer Radius Backgrounds in SuperCDMS High Voltage Dark Matter Searches
SuperCDMS searches for Dark Matter in the form of WIMPs. SuperCDMS is able to reject most common background events by discriminating between electron and nuclear recoils. In the CDMS low ionization threshold experiment ...
Simulations of Scale-Free Cosmologies for the Small-Scale Cold Dark Matter Universe
(2009-09-26)
Cosmological simulations show that dark matter halos contain a wealth of substructure. These subhalos are assumed have a mass distribution that extends down to the smallest mass in the Cold Dark Matter (CDM) hierarchy, ...
Identification and Reduction of the Alpha Background, From 238U and 232Th Decay Chains, in the DEAP-3600 Experiment.
Different cosmological and astronomical observations from the past century indicate that non-baryonic matter, commonly referred to as dark matter, dominates the composition of the universe. Discovering the nature and ...
The PICO-2L program: Towards Background-Free Dark Matter Direct Detection Using Bubble Chambers
The PICO-2L program commenced in 2013 with the deployment of a 2 litre bubble chamber filled with superheated C3F8 and over the next three years, conducted two separate WIMP-search experiments. The first run was conducted ...