Degree Level

Physical Studies of Cell Division: Statistical Fluctuations; Effects Due to X-Radiation, Temperature, and Hydrostatic Pressure (open access)

Physical Studies of Cell Division: Statistical Fluctuations; Effects Due to X-Radiation, Temperature, and Hydrostatic Pressure

Thesis discussing "a technique for determining the generation times of individual yeast cells...the effect of x-radiation on the generation times of individual cells and their progeny..." and "attempts to synchronize cell division in a population of cells."
Date: December 9, 1954
Creator: Burns, Victor Will
Object Type: Thesis or Dissertation
System: The UNT Digital Library
High Pressure Low Resistance Joint (open access)

High Pressure Low Resistance Joint

The following report describes the usage of tin-foil to obtain a mechanical joint of low electrical resistance while providing a seal to hold water at a pressure of 300 psi.
Date: March 28, 1955
Creator: Peters, Ralph
Object Type: Report
System: The UNT Digital Library
A Numerical Method for Two-Dimensional Lagrangian Hydrodynamics (open access)

A Numerical Method for Two-Dimensional Lagrangian Hydrodynamics

Abstract: "A completely Lagrangian scheme for differencing hydrodynamical equations in two dimensions is described. The method conserves mass exactly. The advantages of Lagrangian over Eulerian schemes are briefly mentioned. An appendix gives the generalization to three dimensions."
Date: December 10, 1953
Creator: DeWitt, Bryce S.
Object Type: Report
System: The UNT Digital Library
High Energy Fission and Spallation of Uranium (open access)

High Energy Fission and Spallation of Uranium

From introduction: "This report is an attempt to examine, semiquantitavely, the way the competition between neutron emission and fission varies for heavy nuclei as a function of nuclear type and excitation energy. Many of the ideas herein are the results of discussions with R. H. Goeckermann and W. Heckrotte of the University of California Radiation Laboratory."
Date: February 25, 1954
Creator: Batzel, Roger Elwood
Object Type: Report
System: The UNT Digital Library
Some Aspects of the Radial Stability in a Magnetic Mirror Machine (open access)

Some Aspects of the Radial Stability in a Magnetic Mirror Machine

Abstract: "The radial motion of an ion in an axially symmetric magnetic field is discussed. It is pointed out that particles of constant velocity have clearly defined upper limits to their radial motion. This is a result of the other constant of the motion, the canonical angular momentum. These limits are independent of the number of times an ion is reflected from the mirrors, providing the field is truly axially symmetric."
Date: March 19, 1954
Creator: Henrich, Louis R.
Object Type: Report
System: The UNT Digital Library
Reflection of Electrons by a Model Magnetic Mirror Machine (open access)

Reflection of Electrons by a Model Magnetic Mirror Machine

Abstract: A visualized electron beam has been reflected by a conventional magnetic mirror. Visualization of the beam path from the electron gun to and including the region of reflection was achieved by the "thread ray" technique of Wehnelt. The total current passing through a magnetic mirror has been measured as a function of the beam energy and angular momentum for Hâ‚‚ over a range of pressures from 0.5 to 5 microns.
Date: May 28, 1954
Creator: Ford, Franklin C.
Object Type: Report
System: The UNT Digital Library
Table Top Ion Source (open access)

Table Top Ion Source

Report discussing experiments to evaluate ion sources for possible use in a thermonuclear reactor.
Date: June 16, 1954
Creator: Ford, Franklin O. & Zizzo, Samuel G.
Object Type: Report
System: The UNT Digital Library
Acceleration of a Plasma by Time-Varying Magnetic Fields (open access)

Acceleration of a Plasma by Time-Varying Magnetic Fields

Abstract: An application of the magnetic mirror principle to the acceleration of a plasma is described. It is shown that an axially symmetric magnetic field which increases with time but decreases with distance along the axis can impart a net translational energy to a plasma. This effect on a plasma is contrasted with that arising from an impressed electric field, which is not effective in producing acceleration.
Date: December 6, 1954
Creator: Post, Richard F.
Object Type: Report
System: The UNT Digital Library
Measurement of the Behavior of a Plasma in a Magnetic Field by Means of Probes (open access)

Measurement of the Behavior of a Plasma in a Magnetic Field by Means of Probes

Abstract: "Probes were used to measure certain properties of the cloud of positive ions and electrons ejected from a pulsed ion source having two hydrogen-loaded electrodes. Time-of-flight measurements show: the presence of H+ ions with 50 ev directed energy; an increase of this energy with increasing pulse current in the source; a higher peak yield of ions with higher peak currents in the source; and higher yields and higher ion energies up to 110 ev have been recorded with the use of a pulsed magnetic field impressed upon the source. The neutral positive ion-electron beam from the source has been projected against an increasing magnetic field and the reflected and transmitted signals have been recorded and compared as a function of the magnetic field. Probe signals from the plasma as it encounters the magnetic field are oscillatory, suggesting that magnetohydrodynamic phenomena are presented."
Date: December 1, 1954
Creator: Bostick, W. H.; Zizzo, S. G. & Cook, Buford
Object Type: Report
System: The UNT Digital Library
Use of Thermal Electromotive Forces to Product Magnetic Field in a Controlled Thermonuclear Reactor (open access)

Use of Thermal Electromotive Forces to Product Magnetic Field in a Controlled Thermonuclear Reactor

The following report investigates the possible use of thermal emf's to produce the plasma-containing magnetic field in a thermonuclear reactor.
Date: December 27, 1954
Creator: Northrop, Theodore G.
Object Type: Report
System: The UNT Digital Library
An "Exact" Analysis of a Cylindrical Plasma in a Magnetic Field (open access)

An "Exact" Analysis of a Cylindrical Plasma in a Magnetic Field

Abstract: "The analysis of an immobilized plasma is here extended to the case where the geometry is cylindrical rather than Cartesian. (This report, UCRL-4439 (Rev, 4 constitutes Part II of the report series (UCRL-4466, Parts I, III, and IV) dealing with this general problem.)"
Date: January 14, 1955
Creator: Tonks, Lewi, 1897-1971
Object Type: Report
System: The UNT Digital Library
The Elimination of Microwave Reflections (open access)

The Elimination of Microwave Reflections

Abstract: "The reflections of microwaves from the walls of a plasma-containing vessel are studied. The probable cause of the reflections is discussed, and several suggestions are made for eliminating the reflections from the waveguide in the vessel and particularly from the pyrex vessel wall and copper tubing surrounding the pyrex. Quarter-wave-thick carbon-filled plastics or glasses having a very low vapor pressure room most promising when placed inside the pyrex cylinder. BaTiO3 appears to be an excellent material when placed outside the vacuum."
Date: February 1, 1955
Creator: Beard, David
Object Type: Report
System: The UNT Digital Library
Effect of a Decelerating Grid on Current from an Ion Source (open access)

Effect of a Decelerating Grid on Current from an Ion Source

Abstract: "A theoretical criterion is given for the conditions under which the ions from an ion source may be decelerated by a decelerating grid, following the accelerating grid which extracts ions from the emitter, without causing a reduction in the current supplied by the source."
Date: February 23, 1955
Creator: Bing, George F., 1924-; Gardner, C. S. & Northrop, Theodore G.
Object Type: Report
System: The UNT Digital Library
Electron Capture and the Auger Effect in the Heaviest Elements (open access)

Electron Capture and the Auger Effect in the Heaviest Elements

Thesis describing the Auger effect in the heaviest elements. The elements detailed in the report are ytterbium, polonium, and uranium. Measurements of K fluorescence yields and K Auger electron intensity ratios are given.
Date: August 1955
Creator: Gray, Peter Rygaard
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Linear Accelerator for Heavy Ions (open access)

Linear Accelerator for Heavy Ions

The following report discusses the construction of two heavy-ion linear accelerators, one at the the University of California Radiation Laboratory and the other at Yale University. The goal for these accelerators is to produce ions of masses up to that of neon with energies of 10 Mev per nucleon.
Date: March 27, 1959
Creator: Wells, Don
Object Type: Report
System: The UNT Digital Library
The Masses of Identified Positive Heavy Mesons (open access)

The Masses of Identified Positive Heavy Mesons

The following report describes the charged secondary particles from all presently known decay modes of positive K mesons that have been identified, and the masses of the primaries measured by the momentum-range method.
Date: April 5, 1956
Creator: Peterson, James Ray
Object Type: Thesis or Dissertation
System: The UNT Digital Library
The Bevatron and its Place in Nuclear Physics (open access)

The Bevatron and its Place in Nuclear Physics

From page 2: "This article first describes the Bevatron [particle accelerator] and its operation, and then discusses a portion of the research program. The principles of the machine and its early history were given in "The Bevatron," by Lloyd Smith, Scientific American, February 1951."
Date: April 6, 1956
Creator: Lofgren, E. J.
Object Type: Report
System: The UNT Digital Library
Absolute Cross Sections for Secondary Particles Produced in High-Energy Nuclear Bombardments (open access)

Absolute Cross Sections for Secondary Particles Produced in High-Energy Nuclear Bombardments

From abstract: Absolute cross sections for the production of charged secondary particles is the bombardments of aluminum, nickel, silver, and gold by 332-Mev protons, 187-deuterons, and 380-Mev alpha particles have been determined.
Date: April 20, 1956
Creator: Bailey, L. Evan
Object Type: Report
System: The UNT Digital Library
Production of Neutral Photopions as a Function of Atomic Weight (open access)

Production of Neutral Photopions as a Function of Atomic Weight

Thesis discussing the relative yield of neutral pions from elements in a reaction "as a function of the quantum-limit energy (the maximum energy of the quanta in the bremsstrahlung beam) of the Berkeley synchrotron." Interpretation of the results leads to values for the mean free path for absorption of the neutral pions in nuclear matter.
Date: May 28, 1956
Creator: Anderson, John David
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Experiments on Polarization in Scatterig Deuterons from Complex Nuclei and in Proton-Proton Scattering (Thesis) (open access)

Experiments on Polarization in Scatterig Deuterons from Complex Nuclei and in Proton-Proton Scattering (Thesis)

Abstract: "The elastic double scattering of deuterons by complex nuclei has been investigated experimentally. Measurements were made on carbon, aluminum, and copper at around 157 Mev; on lithium, beryllium, and carbon at around 125 Mev; and on carbon and aluminum at 94 Mev. The expected tensor components of the deuteron polarization have not been observed. Measurements have been made of the differential cross section and vector-type polarization as a function of angle for the scattering of deuterons from the above elements, at the above energies. The observed polarizations were larger than would be expected on the basis of the individual nucleon-nucleus interactions. In a second experiment we measured the 169-Mev proton-proton polarization at 10, 15, 22.5, 30, and 35 in the laboratory system. The results indicate that partial waves up to and including L = 3 are important at this energy."
Date: May 11, 1956
Creator: Baldwin, John A., Jr.
Object Type: Report
System: The UNT Digital Library
Occluded-Gas Ion Source (open access)

Occluded-Gas Ion Source

"Characteristics of a pulsed, occluded-gas ion source, operating in a magnetic field, have been investigated. Mass spectra of hydrogen- and deuterium-loaded sources are presented. Constructional details of the source and its operating characteristics are discussed."
Date: June 27, 1956
Creator: Ehlers, Kenneth W.
Object Type: Report
System: The UNT Digital Library
Alpha-Decay Studies in the Heavy Element Region (open access)

Alpha-Decay Studies in the Heavy Element Region

Thesis describing a research conducted to extend observations on nuclear energy levels and how they effect the nucleus itself, and an investigation on the gamma rays associated for the even-even isotopes and to obtain additional data for the oddmass neclei in the hope that more regularities will become apparent for that class of nuclides.
Date: July 3, 1956
Creator: Hummel, John Philip
Object Type: Thesis or Dissertation
System: The UNT Digital Library
Linear Pinch Work in Berkeley (open access)

Linear Pinch Work in Berkeley

The following report discusses the data of the Z-field pick-up loop, an effective diagnostic tool introduced to help experiments with the linear pinch.
Date: July 1956
Creator: Anderson, O. A. & Baker, W. R.
Object Type: Report
System: The UNT Digital Library
Stability Constants of Alphahydroxyisobutyric Acid Complexes With Actinide Elements (open access)

Stability Constants of Alphahydroxyisobutyric Acid Complexes With Actinide Elements

From abstract: "The stability constants of curium and americium alpha hydroxyisobutyrate complexes were determined by means of ion exchange equilibrium measurements on Dowex-50 four percent resin in the ammonium form."
Date: September 26, 1956
Creator: Odenheimer, B. Graus & Choppin, Gregory R.
Object Type: Report
System: The UNT Digital Library