Browsing Department of Physics, Engineering Physics and Astronomy Graduate Theses by Title
Now showing items 155-174 of 240
-
On an Emerging Paradigm of Tepid Stars: Assessing the Magnetic Desert and the Magnetic Origin of Surprisingly Common Star Spots
The past decade has seen several significant shifts in the field of stellar magnetism, particularly on the observational front. A new generation of dramatically more efficient, high-resolution spectropolarimetric instruments ... -
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 ... -
On the influence of the cosmological constant on trajectories of light and associated measurements
(2013-10-01)In this thesis we review and build on the common methods used to analyze null geodesics in Schwarzschild de Sitter space. We present a general technique which allows finding measurable intersection angles of null trajectories ... -
Optical And Acoustical Studies Of The Proposed PICO-250L Dark Matter Detector
(2014-11-20)In the first part of this work I explore the possibility of using linear alkylbenzene, the buffer liquid for the future PICO-250L detector, configured as a liquid scintillator that could provide information on the background ... -
Optical properties of chiral thin films and microparticles
(2016-09-20)In this work I study the optical properties of helical particles and chiral sculptured thin films, using computational modeling (discrete dipole approximation, Berreman calculus), and experimental techniques (glancing angle ... -
Optical Properties of Individual and Bundled Single-Walled Carbon Nanotubes
(2014-09-13)Single-walled carbon nanotubes (SWCNTs) are nearly ideal one-dimensional systems, with aspect ratios exceeding 10$^{5}$:1. The band gap of a SWCNT, determined by the species, covers the majority of the visible spectrum ... -
The optical properties of metamaterial waveguide structures
(2008-11-04)Metamaterials, artificially engineered structures with negative average relative permittivity and permeability, provide a route to creating potential devices with exciting electromagnetic properties that cannot be obtained ... -
Optically Active Chiral Mediums Fabricated with Glancing Angle Deposition
(2012-07-06)Optically active helical microparticles are studied in the forms of thin films, suspensions and powders. From fabricated helical porous thin films, microparticle suspensions are obtained by removing the microparticles (film ... -
Optimization of spherical proportional counter backgrounds and response for low mass dark matter search
The NEWS-G collaboration uses Spherical Proportional Counters to search for Weakly Interacting Massive Particles (WIMP). The first detector developed for this goal is a 60 cm diameter sphere installed at the Laboratoire ... -
Persistent currents in bosonic mixtures in the ring geometry
(2012-03-28)The present thesis is devoted to an analysis of the possibility of Bose condensates supporting persistent currents in the ring geometry. Our analysis is based on an approach developed by F. Bloch which focuses on the ... -
Perylene Diimide Molecular Glass: Investigations of Charge Transport
(2016-08-03)A new glass-forming organic semiconductor material was synthesized using a known electron transport material, perylene diimide, and attaching it to a molecular glass in order to allow the material to be solution processed. ... -
Phase Space Structure of Disequilibrium in the Milky Way
Following Gaia Data Release 2, observations of spiral structure in the vertical phase space of the Milky Way have been made. In this thesis we set out to explain these structures, using a combination of analytic modeling, ... -
Phenomenological Studies and Analysis Techniques to Search for Light Dark Matter With NEWS-G
The NEWS-G collaboration uses gas-filled Spherical Proportional Counters (SPCs) to search for low-mass dark matter. As one of several competing collaborations pushing the low-energy frontier of particle detection technology, ... -
Phononic Crystal Surface Structures on Gallium Arsenide
A series of computational studies of surface phononic crystals on cubic gallium arsenide are explored to elucidate the behaviour of surface acoustic waves in such systems. The enhanced understanding of surface acoustic ... -
Phononic Crystal Waveguiding in GaAs
(2013-11-29)Compared to the much more common photonic crystals that are used to manipulate light, phononic crystals (PnCs) with inclusions in a lattice can be used to manipulate sound. While trying to propagate in a periodically ... -
Physical properties of a complete volume-limited sample of Ap/Bp stars: Magnetic. rotational, multiplicity, and evolutionary properties of magnetic intermediate-mass stars within 100 pc of the sun
(2007-09-27)The population of all magnetic chemically peculiar stars (Ap stars) within 100 parsecs of the sun has been identified and investigated, determining fundamental parameters, rotational properties, and magnetic field ... -
The PICO Dark Matter Search: Reflections and Projections
Dark matter remains one of the most intriguing mysteries of modern physics, and has sparked numerous experimental efforts to uncover its particle nature. Direct detection experiments using low threshold detectors in clean, ... -
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 ... -
Polarimeter for an Accelerated Spheromak
(2014-05-01)A three-beam heterodyne polarimeter has been designed and constructed to measure line-integrated density and Faraday rotation of accelerated spheromak plasmas in the Plasma Injector 1 and 2 devices (PI-1, PI-2) at General ... -
Polymer Electrochemical Light-Emitting Devices and Photovoltaic Cells
(2009-12-14)Light-emitting electrochemical cells (LECs) are solid state polymer devices operating through the formation of a light-emitting p-n junction by in situ electrochemical doping. The LEC film contains a luminescent polymer ...