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  Partner: UNT Libraries
 Degree Discipline: Physics
 Degree Level: Master's
 Collection: UNT Theses and Dissertations
Nonlinear UV Laser Build-up Cavity: An Efficient Design

Nonlinear UV Laser Build-up Cavity: An Efficient Design

Date: May 2009
Creator: Rady, Nicholas Henry
Description: Using the concept of the build-up cavity for second harmonic generation to produce 243nm laser light, an innovative cavity is theoretically explored using a 15mm length CLBO crystal. In order to limit the losses of the cavity, the number of effective optical surfaces is kept to only four and the use of a MgF2 crystal is adopted to separate the harmonic and fundamental laser beam from each other. The cavity is shown to have an expected round trip loss of five tenths of a percent or better, resulting in a conversion efficiency greater than 65%.
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The Stereochemistry of Diphenylhexatriene

The Stereochemistry of Diphenylhexatriene

Date: 1948
Creator: Secrest, Everett Leigh
Description: The problem with which this paper is concerned has as its basis one of the most important properties of the conjugated system of double bonds found in some organic molecules, namely, the ability to exhibit stereoisomerism.
Contributing Partner: UNT Libraries
Superconductivity

Superconductivity

Date: 1948
Creator: Ward, M. B.
Description: This thesis is a study of the phenomenon of superconductivity.
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Dipole Moments of Diphenyl Compounds with Conjugated Double Bonds

Dipole Moments of Diphenyl Compounds with Conjugated Double Bonds

Date: 1950
Creator: Spalding, Dan W.
Description: This thesis is a continuation of a study of molecular moments begun by Joseph T. Fielder. In his paper he discussed the theory and the equipment necessary for such a study. It is the purpose of this paper to set forth modifications of his equipment, to present data obtained with this modified equipment, and to interpret this data.
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Measurement of Dielectric Constant and Dipole Moment of Liquids

Measurement of Dielectric Constant and Dipole Moment of Liquids

Date: 1948
Creator: Fielder, Joseph T., Jr.
Description: A study of procedures and techniques of measuring dielectric constant and dipole moment of liquids.
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A Positive Ion Source

A Positive Ion Source

Date: 1948
Creator: Hannah, Kenneth W.
Description: This paper describes the construction of a positive ion source of the electrodeless discharge type and may be divided into two main topis; (1) the radio frequency oscillator and power amplifier and associated power supply and (2) the ionization chamber.
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A Reverberation Time Meter

A Reverberation Time Meter

Date: 1950
Creator: Stockard, Raymond
Description: This thesis describes the construction of an apparatus to measure reverberation time.
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Absolute Beta Counting Using Thick Sources

Absolute Beta Counting Using Thick Sources

Date: 1950
Creator: Anderson, Miles E., 1926-
Description: The problem with which we shall concern ourselves in this paper is the self-scattering and self-absorption of beta particles by the source.
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Dipole Moments of Olefenic Diesters

Dipole Moments of Olefenic Diesters

Date: 1951
Creator: Shipley, Floyd D.
Description: It is the purpose of this paper to present experimental data for the determination of the dielectric constant and the dipole moments for a series of olefenic diesters of the cis and trans configurations.
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A Deuterium-Deuterium Type Neutron Source

A Deuterium-Deuterium Type Neutron Source

Date: 1951
Creator: Windham, Pat M.
Description: In view of the advantages of its type, the decision to construct a neutron source of the particle accelerator type was made. The purpose of this thesis is to survey the problems encountered in the construction of the source.
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A Two-Dimensional Model Study of Elastic Waves

A Two-Dimensional Model Study of Elastic Waves

Date: 1955
Creator: Fulton, Thomas K.
Description: In seismic field operations complex problems often arise which cannot be solved mathematically. In recent years investigators in both the commercial and academic fields have begun to approach the problems of elastic wave propagation by the use of seismic scale models. This thesis discusses the results measured from simulated seismic activity on a scale model built by the researcher.
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A Continuously Sensitive Cloud Chamber

A Continuously Sensitive Cloud Chamber

Date: 1951
Creator: Hughes, James E.
Description: A continuous cloud chamber would be a valuable asset to laboratory work in nuclear and atomic physics. For this reason the construction and investigation of a continuously sensitive diffusion cloud chamber has been undertaken. It is the purpose of this paper to report the design and operating characteristics of such a chamber.
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Crystalline Polymorphism of Nitrates

Crystalline Polymorphism of Nitrates

Date: 1951
Creator: Shepherd, Jimmie G.
Description: The purpose of this study was to investigate the polymorphism of a group of related compounds. Special emphasis was placed upon the temperature at which transitions occurred and a possible correlation of these temperatures with other properties of the compounds.
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The Use of Mossbauer Effect for the Study of Recoilless Rayleigh Scattering of Low-Energy Gamma Rays from Sodium Chloride

The Use of Mossbauer Effect for the Study of Recoilless Rayleigh Scattering of Low-Energy Gamma Rays from Sodium Chloride

Date: August 1963
Creator: Fowler, Eugene Franklin
Description: Evidence that recoilless emission and absorption exist may be shown by an experiment in which the source gamma rays are allowed to pass through a suitable absorber to a detector.
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Extinguishment of a Low-pressure Argon Discharge by a Magnetic Field

Extinguishment of a Low-pressure Argon Discharge by a Magnetic Field

Date: January 1964
Creator: Criswell, David Russell
Description: The experiment in this study involves the extinguishment of a low-pressure argon discharge by a magnetic field.
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Thermomagnetic Phenomena in Antimony at Liquid Helium Temperatures

Thermomagnetic Phenomena in Antimony at Liquid Helium Temperatures

Date: January 1964
Creator: Haywood, Charles Thomas
Description: The purpose of this investigation was to study head-transport phenomena in a single crystal of antimony at liquid helium temperatures. In particular, the longitudinal and transverse components of the thermal resistivity tensor were measured as a function of magnetic field up to eighteen kilogauss.
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Magnetically Driven Instabilities in Gas Discharges

Magnetically Driven Instabilities in Gas Discharges

Date: August 1963
Creator: Choate, Jimmie W.
Description: In the present experiment a gas discharge plasma generator was designed and constructed and a search was made for evidence of a plasma instability due to the influence of an externally applied magnetic field. The evidence for such an unstable mode of operation is too indirect to make a possible conclusion, but an approach to more certain identification will be indicated.
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Thermal Properties of a Single Crystal of Bismuth at Liquid-helium Temperatures

Thermal Properties of a Single Crystal of Bismuth at Liquid-helium Temperatures

Date: January 1964
Creator: Alsup, Dale Lynn
Description: The purpose of this investigation was the determination of the thermal conduction properties of a single crystal of bismuth at liquid-helium temperatures in magnetic fields up to eighteen kilogauss.
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A Vacuum Tube for an Electrostatic Accelerator

A Vacuum Tube for an Electrostatic Accelerator

Date: June 1963
Creator: Wiley, Ralph
Description: The purpose of this study has been to design a prototype accelerating tube, to determine the correct point shape and spacing needed to produce corona current along the tube for the case of negative-point-to-positive-plane discharge, and to study the voltage-gradient characteristics of short sections of the tube when they were evacuated to a low internal pressure.
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Nuclear Magnetic Resonance in Hydrated Crystals - Potassium Oxalate Monohydrate

Nuclear Magnetic Resonance in Hydrated Crystals - Potassium Oxalate Monohydrate

Date: May 1962
Creator: Mason, Charley Mack
Description: The problem of this study was the measurement of the proton-proton separation in the water molecule of hydration in a single crystal of potassium oxalate monohydrate.
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Some Galvanomagnetic and Thermomagnetic Effects in a Single Crystal of Antimony

Some Galvanomagnetic and Thermomagnetic Effects in a Single Crystal of Antimony

Date: August 1962
Creator: Parker, Donald L.
Description: The purpose of this investigation is to develop techniques of experimentation in the field of electron transport phenomena.
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Magnetic Susceptibility of a Crystalline Free Radical

Magnetic Susceptibility of a Crystalline Free Radical

Date: June 1962
Creator: Smith, William C.
Description: The entirety of the investigation discussed in this paper was confined to a study of the spin resonance properties of unpaired electrons of an organic free radical. In the remainder of the paper the theory of electron spin resonance, the apparatus used in the investigation, and the experimental results obtained are discussed in that order.
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Quaternion Representation of Crystal Space Groups

Quaternion Representation of Crystal Space Groups

Date: January 1961
Creator: Hufstetler, Thomas Jerry
Description: This investigation is designed to find quaternion operators which will generate selected space groups and which are more convenient to manipulate in some important types of problems.
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Proton Nuclear Magnetic Resonance in Mica

Proton Nuclear Magnetic Resonance in Mica

Date: May 1962
Creator: Townsend, Don H.
Description: The experiments to be described here were undertaken for the purpose of determining, if possible, by NMR techniques whether or not the hydroxyl protons in mica are bound in a regular crystalline array, and, if so, whether or not the hydroxyl protons occur in reasonably isolated pairs as in waters of hydration.
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