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A Vertical Coarse Approach Scanning Tunneling Microscope
(2009-06-25)
A Pan-style scanning tunneling microscope (STM), with a vertical coarse approach mechanism, was designed, built and tested. The microscope will be operated in ultra-high vacuum and also at cryogenic temperatures (8 K) ...
Feedback controlled electromigration for the fabrication of point contacts and noise measurement applications
(2015-10-03)
Lithographically fabricated point contacts serve as important examples of mesoscopic conductors, as electrodes for molecular electronics, and as ultra-sensitive transducers for mechanical motion. We have developed a ...
Quantitative Characterization of Nanovoids in Quenched Aluminum Using Small Angle X-ray Scattering Studies
(2011-10-14)
A small angle X-ray scattering (SAXS) study of quenched-in nanovoids in 99.988 and 99.995 at.% aluminum (Al) is presented. Nanovoids are agglomerations of point defects
(vacancies) in the metallic host. SAXS is a ...
The Rayleigh ratio measurement for SNO+ liquid scintillator and background studies of the internal ropes
(2012-09-10)
As a successor of the Sudbury Neutrino Observatory, the SNO+ experiment is planned
to start data taking in early 2013. Making use of the liquid scintillator, Linear
Alkylbenzene (LAB), the SNO+ experiment aims to perform ...
Analysis of Cosmogenic Impurities in Tellurium and Development of Tellurium Loading for the SNO+ Experiment
(2016-08-29)
For the SNO+ neutrinoless double beta decay search, various backgrounds, ranging from impurities present naturally to those produced cosmogenically, must be understood and reduced. Cosmogenic backgrounds are particularly ...
Probing Molecular Dynamics with Non-Linear Optical Techniques
(2011-09-01)
The dynamics of molecules in the gas and liquid phase is investigated using ultrafast
optical techniques. The development of sub-25 fs ultrafast sources using noncollinear optical parametric amplification is discussed. ...
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 ...
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 ...
A Fully Self-Consistent Constraint on the Mass of M31 and the Local Group
(2010-08-27)
We present the first fully self-consistent, axisymmetric, dynamical model of the Andromeda galaxy (M31). We constrain the physical parameters of the model with datasets on all radial scales: the bulge projected velocity ...