Department of Physics, Engineering Physics and Astronomy Graduate Theses
Recent Submissions
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Inline Temperature Imaging: A Non-contact Temperature Measurement Technique for Laser Processing
Laser keyhole welding and laser additive manufacturing are high intensity laser based advanced manufacturing techniques that offer numerous advantages over more traditional processes. However, because of the extreme spatial ... -
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 ... -
Self-Organization and Light-Induced Chirality in Azo-Glass Material
Azobenzene derivatives have been subject to many studies in the field of all-optical surface patterning due to their unique photoresponsive properties. Photoinduced mass movement of azobenzene enables inscription of surface ... -
Characterization Of Large Area Avalanche Photodiodes For The Measurement Of The Electron Capture Decay Of 40K To The Ground State Of 40Ar
The branching ratio of the direct decay of 40K to the ground state of 40Ar through electron capture has never been experimentally measured. This rate has been shown to be vital in constraining the DAMA/LIBRA (DArk MAtter/Large ... -
The Andromeda Optical and Infrared Disk Survey
The spectral energy distributions of galaxies inform us about a galaxy’s stellar populations and interstellar medium, revealing stories of galaxy formation and evolution. How we interpret this light depends in part on our ... -
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 ... -
Nanoelectromechanical Studies of Suspended Resonators using Graphene grown by Chemical Vapour Deposition
Graphene is an ideal material for high quality nanoelectromechanical resonators due to its high Young's modulus, low mass to surface ratio, ability to sustain high in-plane strain, and unique electrical properties like ... -
Effect of Encapsulation and Light-Soaking on Charge Transport Properties in Organic Semiconductor-Based Diodes
Organic semiconductors (OSs) are gaining attention due to their processability, optical and electrical tunability, and cost-effectiveness. This class of materials is most suitable for flexible electronics and bioelectronics, ... -
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 ... -
Comprehensive Modelling for Eddy Current Based Pressure Tube to Calandria Tube Gap Measurements
The separation between the pressure tube (PT) and calandria tube (CT), known as gap, in the CANada Uranium Deuterium (CANDU®) nuclear reactor fuel channels is monitored using a drive-receive eddy current probe. Gap measurement ... -
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 ... -
Radioreduction and Radiopurity of Acrylic in the DEAP-3600 Dark Matter Experiment
The DEAP-3600 experiment is a single-phase liquid argon dark matter detector employing pulse discrimination to mitigate background-like events and isolate WIMP-like events. The vessel that holds 3600~kg of target, and the ... -
CMOS-Integrated Array Transducers For High-Frequency Ultrasonic Imaging
One of the challenges in the fabrication of array transducers suitable for high-frequency ultrasonic imaging is providing electrical connections between the array elements and external systems such as pulser and beamforming ... -
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 ... -
SCANNING OPTICAL IMAGING AND STRESS TESTS OF POLYMER LIGHT-EMITTING ELECTROCHEMICAL CELLS
Polymer light-emitting electrochemical cells (PLECs) were tested by means of bias stress, luminescent imaging and optical scanning probing. These cells were characterized in terms of the effect of doping on the operational ... -
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 ... -
Theoretical and computational studies of disorder-induced scattering and nonlinear optical interactions in slow-light photonic crystal waveguides
Photonic crystal waveguides (PCWs) are nano-scale devices offering an exciting platform for exploring and exploiting enhanced linear and nonlinear light-matter interactions, aided in-part by slowing down the group velocity ... -
Theory and Modelling of Light-Matter Interactions in Photonic Crystal Cavity Systems Coupled to Quantum Dot Ensembles
Photonic crystal microcavity quantum dot lasers show promise as high quality-factor, low threshold lasers, that can be integrated on-chip, with tunable room temperature opera- tions. However, such semiconductor microcavity ... -
The SHIVir Survey: A Dynamical Catalogue of Virgo Cluster Galaxies and their Scaling Relations
By virtue of its proximity and richness, the Virgo galaxy cluster is a perfect testing ground to expand our understanding of structure formation in the Universe. Here, we present a comprehensive dynamical catalogue based ... -
Polymer Light-Emitting Electrochemical Cells with Embedded Bipolar Electrodes: Visualizing Bipolar Electrochemistry in Solid State
(2016-10-17)The work presented in this thesis examines the properties of BPEs of various configurations and under different operating conditions in a large planar LEC system. Detailed analysis of time-lapsed fluorescence images allows ...
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