A Search for New Leptons with Heavy Neutrinos in e/sup +/e/sup -/ Annihilation at. sqrt. s = 29 GeV. [None] (open access)

A Search for New Leptons with Heavy Neutrinos in e/sup +/e/sup -/ Annihilation at. sqrt. s = 29 GeV. [None]

This thesis describes the results of a search for new leptons with associated heavy neutrinos. The search uses 68.1 pb/sup /minus/1/ of data taken with the TPC2..gamma.. detector at the PEP storage ring. New lepton pairs with charged lepton masses m/sub L/ < 12 GeV and mass differences in the approximate range 0.4 GeV < m/sub L/ /minus/ m/sub/nu/L/ < 2.5 GeV are excluded at the 99% confidence level. Results are also given of a study of search techniques for the region m/sub L/ < 12 GeV, m/sub L/ /minus/ m/sub ..nu..L/ < 0.4 GeV.
Date: May 5, 1988
Creator: Mathis, L. G.
Object Type: Report
System: The UNT Digital Library
Rotating liquid blanket with no first wall for fusion reactors (open access)

Rotating liquid blanket with no first wall for fusion reactors

A toroidal vortex of liquid FLiBe (LiF + BeF/sub 2/) is suggested for the blanket of a fusion reactor. Because this system has no solid first wall, it might avoid many of the problems that accompany conventional blanket design. The liquid is sustained by nozzles that inject a continuous layer of cool liquid on the inner surface. A second set of nozzles sends a stream of droplets across the diverted scrape-off layer or edge plasma to carry its heat away. The feasibility issues of most importance are judged to be avoiding turbulent breakup of the vortex and preventing too much contamination of the plasma by the evaporating FLiBe. 6 refs., 5 figs., 1 tab.
Date: October 5, 1988
Creator: Moir, Ralph W.
Object Type: Article
System: The UNT Digital Library
Design of a superconducting wiggler system (open access)

Design of a superconducting wiggler system

We present a wiggler system based on currently available superconducting technology. The system is designed to provide maximum central field of 4.4 tesla with a specified period length of 160 mm and a gap of 40 mm, while meeting the field quality requirements along all axes. Also included are preliminary cost estimates and a survey of world-wide RandD efforts on superconducting wiggler systems. 12 refs., 6 figs., 3 tabs.
Date: October 5, 1988
Creator: Shen, S. S.; Miller, J. R.; Heim, J. R. & Slack, D. S.
Object Type: Report
System: The UNT Digital Library
Kinetic simulation of magnetic reconnection in the presence of shear (open access)

Kinetic simulation of magnetic reconnection in the presence of shear

The basic physical processes associated with collisionless magnetic reconnection are investigated using the implicit PIC code AVANTI. The code is based on a 2.5-D fully electromagnetic direct implicit algorithm which has proven stable for arbitrary time step. This stability makes it possible to separate out the respective roles of the highly magnetized electrons and the un-magnetized ions for large ion-electron mass ratios. It is found that the inclusion of a guide magnetic field (magnetic shear) severely slows the initial stages of reconnection and damps out the electrostatic ringing if local values of the guide field are above a threshold determined by questions of electron mobility. 9 refs., 6 figs.
Date: September 5, 1988
Creator: Francis, Gregory E.; Hewett, Dennis W. & Max, Claire E.
Object Type: Article
System: The UNT Digital Library
Radiation From Muons At RHIC (open access)

Radiation From Muons At RHIC

None
Date: October 5, 1988
Creator: Stevens, A. J. & Foelsche, H.
Object Type: Report
System: The UNT Digital Library
Internal Beam Dump System for RHIC (open access)

Internal Beam Dump System for RHIC

None
Date: October 5, 1988
Creator: J., Claus
Object Type: Report
System: The UNT Digital Library
Accelerating Uranium in RHIC – II Surviving the AGS Vacuum (open access)

Accelerating Uranium in RHIC – II Surviving the AGS Vacuum

This Report is about the description of the survival rate of charge 90+ uranium ions in the AGS vacuum.
Date: May 5, 1988
Creator: J., Rhoades-Brown M. & Gould, H.
Object Type: Report
System: The UNT Digital Library
An essay on discrete foundations for physics (open access)

An essay on discrete foundations for physics

We base our theory of physics and cosmology on the five principles of finiteness, discreteness, finite computability, absolute non- uniqueness, and strict construction. Our modeling methodology starts from the current practice of physics, constructs a self-consistent representation based on the ordering operator calculus and provides rules of correspondence that allow us to test the theory by experiment. We use program universe to construct a growing collection of bit strings whose initial portions (labels) provide the quantum numbers that are conserved in the events defined by the construction. The labels are followed by content strings which are used to construct event-based finite and discrete coordinates. On general grounds such a theory has a limiting velocity, and positions and velocities do not commute. We therefore reconcile quantum mechanics with relativity at an appropriately fundamental stage in the construction. We show that events in different coordinate systems are connected by the appropriate finite and discrete version of the Lorentz transformation, that 3-momentum is conserved in events, and that this conservation law is the same as the requirement that different paths can ''interfere'' only when they differ by an integral number of deBroglie wavelengths. 38 refs., 12 figs., 3 tabs.
Date: October 5, 1988
Creator: Noyes, H. P. & McGoveran, D. O.
Object Type: Article
System: The UNT Digital Library
Preparation of Pu{sup 239} sources (open access)

Preparation of Pu{sup 239} sources

The Separations Technology Laboratory has prepared four sources to be used for calibrating a waste assay system (Passive/Active Neutron Assay) in Building 724-8G (Burial Ground). The four sources contain 0.5, 0.1, 0.05, and 0.01 grams Pu{sup 239}, respectively. The sources were prepared using aliquots from a single solution provided by the Quality Control (QC) group of Laboratories Department. The solution contained weapons-grade plutonium dissolved in nitric acid. Final solution acidity was 3M. Coulometry had been used to obtain a total plutonium content per unit volume. The weight percent of the plutonium isotopes present was obtained via mass spectrometry.
Date: August 5, 1988
Creator: Holcomb, H. P.
Object Type: Report
System: The UNT Digital Library
Direct catalytic conversion of methane and light hydrocarbon gases. Quarterly report No. 5, November 16, 1987--January 15, 1988 (open access)

Direct catalytic conversion of methane and light hydrocarbon gases. Quarterly report No. 5, November 16, 1987--January 15, 1988

The goal of this research is to develop catalysts that directly convert methane and light hydrocarbons to intermediates that later can be converted to either liquid fuels or value-added chemicals, as economics dictate. During this reporting period, we have synthesized and tested several novel catalysts for methane reforming (Tasks 1 and 2) and for partial oxidation of methane (Tasks 3 and 4). We started to test a mixed metal system, an FeRu{sub 3} cluster. This catalyst was supported both on zeolite and on magnesium oxide and the systems were tested for methane reforming at various reaction temperatures. We also prepared and tested a monomeric ruthenium catalyst supported on magnesium oxide. We found that methane is activated at a lower temperature with the basic magnesium oxide support than with acidic supports such as zeolite or alumina. Methane conversions increased with temperature, but the production of coke also increased. We prepared a sterically hindered ruthenium porphyrin encapsulated in a zeolite supercage for catalysis of methane oxidation. The results showed that only carbon dioxide was produced. Addition of axial base to this catalyst gave similar results. Another type of catalyst, cobalt Schiff base complexes, was also prepared and tested for methane oxidation. In …
Date: February 5, 1988
Creator: Wilson, R. B., Jr. & Wai, Chan Yee
Object Type: Report
System: The UNT Digital Library