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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 ...
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 ...
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 ...
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 ...
Simulations of the Muon Veto and Background Expectations for the PICO500 Dark Matter Experiment
PICO500 is an upcoming dark matter experiment searching for Weakly Interacting Massive Particle (WIMP) dark matter. The experiment is a 500L bubble chamber and is currently in the design phase. This thesis presents simulations ...
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, ...
An Investigation of the Effects of Wavelength Shifter Thickness on Backgrounds for the DEAP-3600 Dark Matter Direct Detection Experiment
Several lines of astronomical evidence indicate that most of the matter in our universe is made of non-luminous material known as dark matter, the nature of which remains a mystery. DEAP-3600 is a liquid-argon-based ...
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 ...