Now showing items 1-10 of 88
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 ...
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 ...
Experimental measurement of the fluctuations of a laser beam due to thermal turbulence.
In this work, we considered and developed a new method to detect and quantify the fluctuations of a laser beam due to thermal turbulence. The new method consisted of a single laser beam propagating in air and passing ...
The association between VLF and ELF chorus emissions and electron precipitation.
This is an investigation into the association between ionospheric absorption caused by electron precipitation and ELF:3 Hz-3 kHz and VLF:3 kHz-30 kHz, chorus. Ionospheric absorption was measured using the chain of riometers ...
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 ...
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 ...
Characterization and improvement of a direct solar radiation detector.
A low-cost Direct Solar Radiation Detector (DSRD) was developed in house in the Department of Physics at the University of KwaZulu-Natal (Westville). A main use of this instrument is to gather solar energy data that are ...
Measurement and computational modelling of intermolecular interactions in fluids.
The molecular theory of the second light-scattering virial coefficient Bp describing the effects of interacting pairs of molecules on the depolarization ratio p of Rayleigh-scattered light is reviewed, both for interacting ...
Quantum dynamics in the partial Wigner picture.
The Wigner formalism can be used to provide a representation of quantum dynamics in a classical-like phase space. However, there are many cases, such as when dealing with spin systems in a dissipative environment, in ...