Browsing Department of Physics, Engineering Physics and Astronomy Graduate Theses by Title
Now showing items 13-32 of 235
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Background Measurement Techniques and Sensitivity Studies for the SNO+ Neutrinoless Double Beta Decay Search
(2016-05-30)The control of radioactive backgrounds will be key in the search for neutrinoless double beta decay at the SNO+ experiment. Several aspects of the SNO+ back- grounds have been studied. The SNO+ tellurium purification ... -
A Barkhausen Noise Testing System for CANDU Feeder Pipes
(2009-07-22)A Barkhausen noise (BN) testing system was developed for the non-destructive evaluation (NDE) of residual stresses in CANDU reactor feeder pipes. The system consists of a four-channel arbitrary waveform flux control system ... -
A Bayesian/MCMC Approach to Galaxy Modelling: NGC 6503
(2010-01-11)We use Bayesian statistics and Markov chain Monte Carlo (MCMC) techniques to construct dynamical models for the spiral galaxy NGC 6503. The constraints include surface brightness profiles which display a Freeman Type II ... -
Branched Nanostructured Anodes For Dye-Sensitized Solar Cells
(2015-03-11)The high relative efficiency demonstrated in dye-sensitized solar cells (DSSCs) arises from a combination of light scattering within, and photo-generated electron transport through, the porous structure of a TiO2 anodes. ... -
Calibration Hardware Research and Development for SNO+
(2014-06-02)The SNO+ experiment is a kilo-tonne scale liquid scintillator detector located at SNOLAB in Sudbury, Ontario, Canada. As the successor to the Sudbury Neutrino Observatory, SNO+ will use linear alkylbenzene (LAB) as the ... -
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 ... -
Characterization of a carbon radon filter and Radon detection
(2008-09-04)Carbon filled columns were built and tested as prototype radon filters. The length of time taken for a pulse of radon to travel from one end of the filter to the other was measured using nitrogen, and then air as the ... -
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 ... -
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 ... -
Characterization of the Galactic White Dwarf Population in the Next Generation Virgo Cluster Survey
(2016-08-08)Halo white dwarfs remain one of the least studied stellar populations in the Milky Way because of their faint luminosities. Recent work has uncovered a population of hot white dwarfs which are thought to be remnants of ... -
Charge Density Waves and Electronic Nematicity in the Three Band Model of Cuprate Superconductors
(2014-09-09)Cuprate superconductors exhibit very high critical temperatures, $T_c$, compared to those in the conventional superconductors. The doping at which $T_c$ is maximized is called optimal doping. Below this level, in the ... -
Classical and Quantum Optical Properties of Slow Light Photonic Crystal Waveguides
(2009-09-03)Photonic crystals are optical materials where patterning of dielectrics on sub-wavelength length scales creates unusual optical properties such as waveguides with propagation speeds much slower than the vacuum speed of ... -
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 ... -
Commissioning of an Upgraded Equinox-100 Cobalt-60 Radiation Therapy Unit in the Varian Eclipse Treatment Planning System
The introduction of Cobalt 60 (Co 60) units in the 1950s established megavoltage radiation therapy worldwide. Unfortunately, advances for the Co 60 radiation treatment units were not heavily pursued over the years and Co ... -
Comprehensive Characterization of Measurement Data Gathered by the Pressure Tube to Calandria Tube Gap Probe
(2016-08-30)Multi-frequency eddy current measurements are employed in estimating pressure tube (PT) to calandria tube (CT) gap in CANDU fuel channels, a critical inspection activity required to ensure fitness for service of fuel ... -
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 ... -
A Computational and Experimental Study of Surface Acoustic Waves in Phononic Crystals
(2009-12-24)The unique frequency range and robustness of surface acoustic wave (SAW) devices has been a catalyst for their adoption as integral components in a range of consumer and military electronics. Furthermore, the strain and ... -
Computational study of rovibrational spectra of Van der Waals dimers and their isotopologues
(2012-08-29)A new intermolecular potential energy surface, rovibrational transition frequencies, and line strengths are computed for OCS-OCS and CO2-CS2. The potentials were made by fitting energies obtained from explicitly correlated ... -
Computing Rovibrational Spectra of Small Polyatomic Molecules with Variational and Collocation Methods
It is well-known that some deuterated isotopologues of interstellar molecules achieve a significantly higher deuterium-to-hydrogen ratio than the natural elemental abundance. CH3+ and its deuterated isotopologues are thought ... -
Cone Beam Optical Computed Tomography-Based Gel Dosimetry
(2010-09-02)The complex dose distributions delivered by modern, conformal radiation therapy techniques present a considerable challenge in dose verification. Traditional measurement tools are difficult and laborious to use, since ...