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Gallium nitride based heterojunction field effect transistor: fabrication and application
(2012-06-19)
Gallium nitride (GaN) is a wide bandgap semiconducting material, which is piezoelectric, biocompatible, and also resistive to ionizing radiation. Material properties such as direct bandgap, chemical/thermal stability, ...
Measurements and Modification of Sheared Flows and Stability on the Compact Toroidal Hybrid Stellarator
(2012-04-25)
Sheared flows arising from spatially inhomogeneous, transverse electric fields are common phenomena found in space, laboratory, and fusion plasmas. These flows are a source of free energy that can drive or suppress ...
Measurement of the phase space distribution in a complex plasma
(2012-04-18)
The development of a diagnostic technique that allows measurement of the six dimensional phase space distribution for the dust component of a plasma system is presented. In the course of the measurement and analysis ...
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 ...
Fabrication and Characterization of ZnO and GaN Devices for Electronic and Photonic Applications
(2013-12-04)
The research work presented in this dissertation is based on two direct and wide band gap semiconductors: ZnO and GaN. On the first part of the dissertation, the synthesis of ZnO nanorod array via the low temperature ...
Laboratory Investigation of the Dynamics of Shear Flows in a Plasma Boundary Layer
(2013-10-28)
The laboratory experiments presented in this dissertation investigate a regime of instabilities that occur when a highly localized, radial electric field oriented perpendicular to a uniform background magnetic field gives ...
3-D Global Hybrid Simulations of Mode Conversion at the Dayside Magnetopause
(2014-05-02)
Mode conversion at the magnetopause has been suggested to lead to the generation of kinetic Alfven waves (KAWs) and effective mass transport from the solar wind into the magnetosphere. To investigate the mode conversion ...
Non-perturbative calculations of atomic data for applications in laboratory fusion and astrophysical plasmas
(2012-12-13)
Results are presented for non-perturbative quantal calculations of atomic data for application in laboratory fusion and astrophysical plasmas. One of the key issues in laboratory
fusion plasmas is the accurate modeling ...
Applications of the Classical Two-Coulomb-Center Systems to Atomic/Molecular Physics
(2013-11-01)
We advanced the classical studies of the two-Coulomb-center (TCC) systems consisting of two nuclei of charges Z and Z' and an electron in a circular or a helical state centered on the internuclear axis. These systems ...