Now showing items 1-10 of 142
End-pumped solid-state lasers.
This dissertation consists of four sections, with the focus on near- and mid-infrared lasers using Yttrium Lithium Fluoride (YLF) crystals doped with various rare-earth ions as a gain medium. As introduction a general ...
A study of wave induced electron precipitation at low and middle latitudes.
Wave induced electron precipitation (WIEP) can modify the ionosphere above a sub-ionospherically propagating VLF signal in such a way as to perturb the amplitude and phase of the signal: The "Trimpi Event". In this ...
Constant-temperature dynamics in the Wigner representation of quantum mechanics.
This dissertation deals with theory and algorithms for computer simulations of classical and quantum systems in the canonical ensemble. First, the approach of Nos e-Hoover and its generalization, known as the Nos e- Hoover ...
Computational studies of percolation : determination of the cluster number scaling function for lattices in 2 dimensions.
The main aim of this work is to study percolation theory on regular two dimensional
An investigation of gas lasers.
Pulsed lasers have a wide range of applications in industry, medicine and for scientific research. Many of these devices are expensive and have delicate optics. The nitrogen laser is robust and inexpensive to build and ...
First principles quantum mechanical studies of iridium : a focus on bulk and surface properties.
Recent high-pressure experiments on iridium show a transition to a 14 atomic layer superlattice structure. Since iridium has a high bulk modulus, it is used in many high-pressure applications, for instance as a gasket for ...
Theories and computation of second virial coefficients of electromagnetic phenomena.
Many bulk properties of gases depend linearly on the gas density at lower densities, but as the density increases departures from linearity are observed. The density dependence of a bulk property Q may often be discussed ...
High repetition rate continuously tunable CO2 laser system investigation.
The purpose of this thesis was to investigate certain factors important for the operation of a high repetition rate continuously tunable CO2 laser. The tuning range of specific importance for this research program was ...
On the interaction of laser beams with air : with specific reference to refraction and scattering.
The interaction of laser light with a parcel of air with a known density structure can result in one of three reactions. The simplest of these reactions is reflection. Depending on the nature of the density profile, that ...
Planetary waves and the global ozone distribution.
Planetary waves are known to play an important role in determining the annual variability in the severity of Antarctic ozone depletion. In this thesis, data obtained from the TOMS experiment on board the Nimbus-7 satellite ...