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Alumni J-TAC, January 1985
Alumni magazine of Tarleton State University providing information on events at the school and news about university students, staff, and alumni.
Date:
January 1985
Creator:
Tarleton State University
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Reaction cross-section calculations using new experimental and theoretical level structure data for deformed nuclei
A technique for modeling level structures of odd-odd nuclei has been used to construct sets of discrete states with energies in the range 0 to 1.5 MeV for several nuclei in the rare-earth and actinide regions. The accuracy of the modeling technique was determined by comparison with experimental data. Examination was made of what effect the use of these new, more complete sets of discrete states has on the calculation of level densities, total reaction cross sections, and isomer ratios. 9 refs.
Date:
May 1, 1985
Creator:
Hoff, R. W.; Gardner, D. G. & Gardner, M. A.
Object Type:
Article
System:
The UNT Digital Library
Difficulties with inferring neutron cross sections from charged-particle reactions
We have investigated problems associated with inferring cross sections for neutron reactions on unstable nuclei in the mass-90 region from charged-particle reactions on nearby stable targets. We conclude that effects due to precompound evaporation, isospin, and multiple reaction paths severely limit the circumstances under which charged-particle studies may be directly and easily converted to neutron cross sections of useful accuracy. 4 refs., 2 figs.
Date:
May 7, 1985
Creator:
Gardner, D. G. & Gardner, M. A.
Object Type:
Article
System:
The UNT Digital Library
Importance of level structure in nuclear reaction cross-section calculations. Revision 1
It is shown that level-density expressions cannot adequately represent or substitute for level structure information when making calculations of the Hauser-Feshbach type for cross sections or isomer-ratios for nuclei in the first few MeV above their ground state. It is stated that such discrete level information should include both experimentally confirmed and theoretically predicted levels. The utility of discrete level information to optimize level density calculations, to compute isomer ratios, in deriving dipole strength functions, and in the analysis of primary gamma ray spectra is emphasized, especially for nuclei far from the line of stability. 29 refs., 12 figs., 6 tabs. (DWL)
Date:
November 7, 1985
Creator:
Gardner, M. A. & Gardner, D. G.
Object Type:
Article
System:
The UNT Digital Library
Calculational tools for the evaluation of nuclear cross-section and spectra data
A technique based on discrete energy levels rather than energy level densities is presented for nuclear reaction calculations. The validity of the technique is demonstrated via theoretical and experimental agreement for cross sections, isomer-ratios and gamma-ray strength functions. 50 refs., 7 figs. (WRF)
Date:
May 7, 1985
Creator:
Gardner, M.A.
Object Type:
Article
System:
The UNT Digital Library
[Letter from New York Civil Liberties Union to Honorable Mario M. Cuomo]
A fax from New York Civil Liberties Union stating their stance against Honorable Mario M. Cuomo's regulating prohibition of sexual activity in any establishment with facilities with "high risk sexual activity."
Date:
November 18, 1985
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
History and results of VC-1, the first CSDP corehole in Valles caldera, New Mexico
Valles Caldera No. 1 (VC-1) is the first Continental Scientific Drilling Program (CSDP) corehole drilled in the Valles caldera and the first continuously cored hole in the caldera region. The objectives of VC-1 were to penetrate a hydrothermal outflow plume near its source, to obtain structural and stratigraphic information near the intersection of the ring-fracture zone and the pre-caldera Jemez fault zone, and to core the youngest volcanic unit inside the caldera (Banco Bonito obsidian, 0.13 Ma). VC-1 penetrates 298 m of moat volcanics and caldera-fill ignimbrites, 35 m of pre-caldera volcaniclastic breccia, and 523 m of Paleozoic carbonates, sandstones and shales, with over 95% core recovery. Hydrothermal alterations are concentrated in sheared, brecciated and fractured zones from the volcaniclastic breccia to total depth with both the intensity and rank of alterations increasing with depth. Alterations consist primarily of clays, calcite, pyrite, quartz, and chlorite, but chalcopyrite has been identified as high as 518 m and molybdenite has been identified in a fractured zone at 847 m. Thermal aquifers were penetrated at various intervals from about 510 m on down. 11 refs., 5 figs.
Date:
January 1, 1985
Creator:
Goff, F.; Rowley, J.; Gardner, J.N.; Hawkins, W.; Goff, S.; Pisto, L. et al.
Object Type:
Article
System:
The UNT Digital Library
Oak Ridge rf test facility
The ORNL RF Test Facility is to provide a national facility for the testing and evaluation of steady state, high-power (approx.1.0-MW) Ion Cyclotron Resonance Heating (ICRH) systems and components. The facility configuration consists of a vacuum vessel and two fully tested superconducting development magnets from the EBT-P program, arranged as a simple mirror of mirror ratio 4.8. The axial centerline distance between magnet throat centers is 112 cm. The vacuum vessel cavity has a large port (74 by 163 cm) and a test volume adequate for testing prototypic launchers for DIII-D and TFTR. The magnets are capable of generating a steady state field of approx.3 T on axis in the magnet throats. Steady state plasmas are generated in the facility by cyclotron resonance breakdown using a dedicated 200-kW, 28-GHz gyrotron. Rf sources are available covering a frequency range of 2 to 200 MHz at 1.5 kW and 3 to 18 MHz at 200 kW with several sources at intermediate parameters. Available in July 1986 will be a >1.0-MW, cw source spanning 40 to 80 MHz. The report consists of nine viewgraphs.
Date:
January 1, 1985
Creator:
Gardner, W.L.; Hoffman, D.J.; McCurdy, H.C.; McManamy, T.J.; Moeller, J.A. & Ryan, P.M.
Object Type:
Article
System:
The UNT Digital Library
Oak Ridge rf Test Facility
The rf Test Facility (RFTF) of Oak Ridge National Laboratory (ORNL) provides a national facility for the testing and evaluation of steady-state, high-power (approx.1.0-MW) ion cyclotron resonance heating (ICRH) systems and components. The facility consists of a vacuum vessel and two fully tested superconducting development magnets from the ELMO Bumpy Torus Proof-of-Principle (EBT-P) program. These are arranged as a simple mirror with a mirror ratio of 4.8. The axial centerline distance between magnet throat centers is 112 cm. The vacuum vessel cavity has a large port (74 by 163 cm) and a test volume adequate for testing prototypic launchers for Doublet III-D (DIII-D), Tore Supra, and the Tokamak Fusion Test Reactor (TFTR). Attached to the internal vessel walls are water-cooled panels for removing the injected rf power. The magnets are capable of generating a steady-state field of approx.3 T on axis in the magnet throats. Steady-state plasmas are generated in the facility by cyclotron resonance breakdown using a dedicated 200-kW, 28-GHz gyrotron. Available rf sources cover a frequency range of 2 to 200 MHz at 1.5 kW and 3 to 18 MHz at 200 kW, with several sources at intermediate parameters. Available in July 1986 will be a >1.0-MW, cw …
Date:
January 1, 1985
Creator:
Gardner, W.L.; Hoffman, D.J.; McCurdy, H.C.; McManamy, T.J.; Moeller, J.A. & Ryan, P.M.
Object Type:
Article
System:
The UNT Digital Library
Uncertainty in future global energy use and fossil fuel CO{sub 2} emissions 1975 to 2075: Appendices C--F
In constructing the model, creating variable names, and linking the model to the Monte Carlo program various naming conventions have been used. These appendices attempt to provide a concise, useful guide linking conceptual variable to model variable to Monte Carlo variables designations. Tables give the basic characteristics of the output distributions for each of the 95 output VALs. These appendices describe in technical detail the Monte Carlo techniques used in the uncertainty analysis. The choice of Latin Hypercube sampling and the methodology employed to attribute output variability to input uncertainty is documented. A complete listing of the software and data base used to generate the Monte Carlo analysis is included.
Date:
December 1, 1985
Creator:
Edmonds, J.A.; Reilly, J.M.; Gardner, R.H. & Brenkert, A.
Object Type:
Report
System:
The UNT Digital Library
Uncertainty in future global energy use and fossil fuel CO{sub 2} emissions 1975 to 2075: Appendices A--B
Appendix A contains the Monte Carlo Data Set. The data sheets give the distribution for input variables used in Monte Carlo analysis of the IEA/ORAU Global Energy, CO{sub 2} Model. The data sheets include a discussion of data sources, bibliographic sources, and other considerations used in developing the particular data format and values for distributions. As much detail as possible about how distributions are related to published estimates is given but in most cases it was necessary to make a significant leap from available data to the quantified distribution. The distributions are meant to be roughly accurate and to the degree that uncertainty exists about the form and value of distributions, the authors have tended to opt for wider bounds. Appendix B contains The IEA/ORAU Long-Term Global Energy-CO{sub 2} Model, Version A.84 -- Model Improvements. The model was originally developed in 1982 in support of work conducted for the US Department of Energy Carbon Dioxide Research Division in the area of future global fossil fuel related CO emissions research. The uncertainty analysis, documented in this report, made demands on the model that had not previously been made, and in the process of operating the model much was learned about areas …
Date:
December 1, 1985
Creator:
Edmonds, J. A.; Reilly, J. M.; Gardner, R. H. & Brenkert, A.
Object Type:
Report
System:
The UNT Digital Library
ORNL facilities for testing first-wall components
Future long-impulse magnetic fusion devices will have operating characteristics similar to those described in the design studies of the Tokamak Fusion Core Experiment (TFCX), the Fusion Engineering Device (FED), and the International Tokamak Reactor (INTOR). Their first-wall components (pumped limiters, divertor plates, and rf waveguide launchers with Faraday shields) will be subjected to intense bombardment by energetic particles exhausted from the plasma, including fusion products. These particles are expected to have particle energies of approx.100 eV, particle fluxes of approx.10/sup 18/ cm/sup -2/.s/sup -1/, and heat fluxes of approx.1 kW/cm/sup 2/ CW to approx.100 kW/cm/sup 2/ transient. No components are available to simultaneously handle these particle and heat fluxes, survive the resulting sputtering erosion, and remove exhaust gas without degrading plasma quality. Critical issues for research and development of first-wall components have been identified in the INTOR Activity. Test facilities are needed to qualify candidate materials and develop components. At Oak Ridge National Laboratory (ORNL), existing neutral beam and wave heating test facilities can be modified to simulate first-wall environments with heat fluxes up to 30 kW/cm/sup 2/, particle fluxes of approx.10/sup 18/ cm/sup -2/.s/sup -1/, and pulse lengths up to 30 s, within test volumes up to approx.100 L. …
Date:
January 1, 1985
Creator:
Tsai, C.C.; Becraft, W.R.; Gardner, W.L.; Haselton, H.H.; Hoffman, D.J.; Menon, M.M. et al.
Object Type:
Article
System:
The UNT Digital Library
Analysis of sediments and soils for chemical contamination for the design of US Navy homeport facility at East Waterway of Everett Harbor, Washington. Final report. [Macoma inquinata; Mytilus edulis]
Contaminated sediments in the East Waterway of Everett Harbor, Washington, are extremely localized; they consist of a layer of organically-rich, fine sediments overlying a relatively cleaner, more sandy native material. The contaminated layer varies in thickness throughout the waterway from as much as 2 meters to only a few centimeters. Generally, the layer is thicker and more contaminated at the head of the waterway (northern end) and becomes thinner and less contaminated as one proceeds southerly out of the waterway and into Port Gardner. These sediments contain elevated levels of heavy metals and polynuclear aromatic hydrocarbons (PAH) and scattered concentrations of polychlorinated biphenyls (PCB). Approximately 500,000 cubic yards of material exhibit elevated chemical contamination compared to Puget Sound background levels. The contaminated sediments in this waterway require biological testing before decisions can be made regarding the acceptability of unconfined disposal.
Date:
March 1, 1985
Creator:
Anderson, J.W. & Crecelius, E.A.
Object Type:
Report
System:
The UNT Digital Library
Publications of Los Alamos research, 1984
A bibliographic record of the published research at Los Alamos in 1984 is given.
Date:
December 1, 1985
Creator:
Sheridan, C. J.; McClary, W. J.; Rich, J. A. & Rodriguez, L. L. (comps.)
Object Type:
Report
System:
The UNT Digital Library
Alpha particle diagnostic beam line system to generate an intense Li/sup 0/ beam with an ORNL SITEX source
The Oak Ridge National Laboratory (ORNL) SITEX (Surface Ionization with Transverse Extraction) negative ion source utilizes a 100-V/20-A reflex arc discharge in a 1300-gauss magnetic field to generate Cs+ ions and H+ or D+ ions, depending on the beam required. A shaped molybdenum plate is placed directly behind the arc column. Cesium coverage on this plate is used to minimize the surface work function, which requires two-thirds of a monolayer coverage. Cesium coverage ia adjusted both by cesium flow control into the arc discharge chamber and by temperature control of the converter using gaseous-helium cooling channels in the converter plate. Normal converter operational temperatures are 300/sup 0/ to 500/sup 0/C H/sup -//D/sup -/ beams are generated at the biased converter surface (-150 V with respect to the anode) by Cs/sup +/ sputtering of absorbed hydrogen or deuterium and by the reflection-conversion mechanism of H/sup +//D/sup +/ ions which strike the converter surface at 150 eV. The negative ions are accelerated through the 150-V plasma sheath at the converter surface and are focused by the converter geometry and magnetic field so as to pass through the exit aperture with minimum angular divergence. The ion optics of the SITEX accelerator has been …
Date:
January 1, 1985
Creator:
Dagenhart, W. K.; Stirling, W. L.; Tsai, C. C. & Whealton, J. H.
Object Type:
Article
System:
The UNT Digital Library
Electric energy supply systems: description of available technologies
When comparing coal transportation with electric transmission as a means of delivering electric power, it is desirable to compare entire energy systems rather than just the transportation/transmission components because the requirements of each option may affect the requirements of other energy system components. PNL's assessment consists of two parts. The first part, which is the subject of this document, is a detailed description of the technical, cost, resource and environmental characteristics of each system component and technologies available for these components. The second part is a computer-based model that PNL has developed to simulate construction and operation of alternative system configurations and to compare the performance of these systems under a variety of economic and technical conditions. This document consists of six chapters and two appendices. A more thorough description of coal-based electric energy systems is presented in the Introduction and Chapter 1. Each of the subsequent chapters describes technologies for five system components: Western coal resources (Chapter 2), coal transportation (Chapter 3), coal gasification and gas transmission (Chapter 4), and electric power transmission (Chapter 6).
Date:
February 1, 1985
Creator:
Eisenhauer, J. L.; Rogers, E. A.; King, J. C.; Stegen, G. E. & Dowis, W. J.
Object Type:
Report
System:
The UNT Digital Library
Commissioning the polarized beam in the AGS
After the successful operation of a high energy polarized proton beam at the Argonne Laboratory Zero Gradient Synchrotron (ZGS) was terminated, plans were made to commission such a beam at the Brookhaven National Laboratory Alternating Gradient Synchrotron (AGS). On February 23, 1984, 2 ..mu..A of polarized H/sup -/ was accelerated through the Linac to 200 MeV with a polarization of about 65%. 1 ..mu..A was injected into the AGS and acceleration attempts began. Several relatively short runs were then made during the next three months. Dedicated commissioning began in early June, and on June 26 the AGS polarized beam reached 13.8 GeV/c to exceed the previous ZGS peak momentum of 12.75 GeV/c. Commissioning continued to the point where 10/sup 10/ polarized protons were accelerated to 16.5 GeV/c with 40% polarization. Then, two experiments had a short polarized proton run. We plan to continue commissioning efforts in the fall of this year to reach higher energy, higher intensity, and higher polarization levels. We present a brief description of the facility and of the methods used for preserving the polarization of the accelerating beam.
Date:
January 1, 1985
Creator:
Ratner, L. G.; Brown, H.; Chiang, I. H.; Courant, E.; Gardner, C.; Lazarus, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Experimental level-structure determination in odd-odd actinide nuclei
The status of experimental determination of level structure in odd-odd actinide nuclei is reviewed. A technique for modeling quasiparticle excitation energies and rotational parameters in odd-odd deformed nuclei is applied to actinide species where new experimental data have been obtained by use of neutron-capture gamma-ray spectroscopy. The input parameters required for the calculation are derived from empirical data on single-particle excitations in neighboring odd-mass nuclei. Calculated configuration-specific values for the Gallagher-Moszkowski splittings are used. Calculated and experimental level structures for /sup 238/Np, /sup 244/Am, and /sup 250/Bk are compared, as well as those for several nuclei in the rare-earth region. The agreement for the actinide species is excellent, with bandhead energies deviating 22 keV and rotational parameters 5%, on the average. Applications of this modeling technique are discussed.
Date:
April 4, 1985
Creator:
Hoff, R.W.
Object Type:
Article
System:
The UNT Digital Library
MINIMARS conceptual design: Report I. Volume 1
Engineering parameters and by features of MINIMARS are presented. Topics discussed are startup, halo physics, drift pumping, magnet design, shielding, injector systems, electrical systems, fueling systems, free electric laser, blankets, heat tansport, tritium systems, configuration, assembly and maintainence, and cost. 115 refs., 112 figs., 44 tabs. (WRF)
Date:
December 1, 1985
Creator:
Lee, J.D. (ed.)
Object Type:
Report
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 92, No. 140, Ed. 1 Wednesday, July 24, 1985
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 24, 1985
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Clifton Record (Clifton, Tex.), Vol. 90, No. 20, Ed. 1 Thursday, May 16, 1985
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
May 16, 1985
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Perry Daily Journal (Perry, Okla.), Vol. 91, No. 286, Ed. 1 Saturday, January 12, 1985
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 12, 1985
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Consolidation and shear failure leading to subsidence and settlement. Part I
Subsidence and settlement are phenomena that are much more destructive than generally thought. In shallow land burials they may lead to cracking of the overburden and eventual exposure and escape of waste material. The primary causes are consolidation and cave-ins. Laboratory studies performed at Los Alamos permit us to predict settlement caused by consolidation or natural compaction of the crushed tuff overburden. We have also investigated the shear failure characteristics of crushed tuff that may lead to subsidence. Examples of expected settlement and subsidence are calculated based on the known geotechnical characteristics of crushed tuff. The same thing is done for bontonite/tuff mixes because some field experiments were performed using this additive (bentonite) to reduce the hydraulic conductivity of the crushed tuff. Remedial actions, i.e., means to limit the amount of settlement, are discussed. Finally, we briefly comment on our current field experiment, which studies the influence of subsidence on layered systems in general and on biombarriers in particular.
Date:
November 1, 1985
Creator:
Abeele, W.V.
Object Type:
Report
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 92, No. 153, Ed. 1 Thursday, August 8, 1985
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
August 8, 1985
Creator:
Watson, Milo W.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History