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Vacuum Magnetic Flux Surface Measurements Made on the Compact Toroidal Hybrid
(2008-09-09)
Understanding the behavior of plasmas in magnetic confinement fusion devices typically requires accurate knowledge of the magnetic field structure. In stellarator-type confinement devices, the helical magnetic field is ...
Many-Body Dipole Interactions
(2008-09-09)
This dissertation presents the study of controllable but strong long-range interaction between dipoles. In particular, we investigate the excitation and interaction between atoms in a cold gas where the collisional time ...
Theoretical Study of Thermal Properties and Thermal Conductivities of Crystals
(2008-09-09)
Standard first-principles total energy and force calculations were extended to the calculations of harmonic force constant matrices and third order lattice anharmonicity tensors with an efficient super-cell finite-difference ...
Bulk Gallium Nitride Based Electronic Devices: Schottky Diodes, Schottky-Type Ultraviolet Photodetectors and Metal-Oxide-Semiconductor Capacitors
(2009-02-23)
Gallium Nitride (GaN) is one of most promising semiconductor materials for high power, high temperature and high frequency applications. Due to the lack of native substrates for homoepitaxial growth, GaN electronic devices ...
Atomic Data Generation and Collisional Radiative Modeling of Ar II, Ar III, and Ne I for Laboratory and Astrophysical Plasmas
(2009-07-16)
Accurate knowledge of atomic processes plays a key role in modeling the emission in laboratory
as well as in astrophysical plasmas. These processes are included in a collisional-radiative
model and the results are compared ...
Alternative Growth and Interface Passivation Techniques for SiO2 on 4H-SiC
(2009-02-23)
Silicon Carbide is a novel wide band gap semiconductor material with excellent thermal, chemical and electrical properties. It also shares its natural oxide SiO2 with Si, which has been widely studied and optimized for ...
Application of Generalized Hamiltonian Dynamics to Modified Coulomb Potential
(2008-09-09)
We apply Dirac’s generalized Hamiltonian dynamics (GHD), a purely classical formalism, to spinless particles under the influence of a binomial potential. The integrals of the motion for this potential were chosen as the ...
Time-Dependent Studies of Fundamental Atomic Processes in Rydberg Atoms
(2008-09-09)
This dissertation consists of four time-dependent studies of various fundamental
atomic processes involving highly excited atoms and ions. We use time-dependent
close-coupling theory besides other perturbative and and ...
Interactions between Electromagnetic Ion Cyclotron Waves and Protons in the Magnetosphere: SCATHA Results
(2009-02-23)
Electromagnetic ion cyclotron (EMIC) waves and their role in governing proton populations in the ring current and radiation belt regions are of importance in understanding the dynamics of the Earth’s magnetosphere. The ...
Ohmic Contacts to Implanted (0001) 4H-SiC
(2009-11-20)
The fabrication of low resistance ohmic contacts is a key technology issue for the development of SiC power diodes and transistors. In many cases, contacts are made to implanted regions due to the difficulty of doping SiC ...