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The Boerne Star (Boerne, Tex.), Vol. 92, No. 67, Ed. 1 Friday, September 20, 1996
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
September 20, 1996
Creator:
Aldridge, Leon & D'Amico, Rob
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 92, No. 68, Ed. 1 Tuesday, September 24, 1996
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
September 24, 1996
Creator:
Aldridge, Leon & D'Amico, Rob
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 92, No. 69, Ed. 1 Friday, September 27, 1996
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
September 27, 1996
Creator:
Aldridge, Leon & D'Amico, Rob
Object Type:
Newspaper
System:
The Portal to Texas History
The role of gamma rays and freely-migrating defects in reactor pressure vessel embrittlement
Gamma ray effects are often neglected when evaluating reactor pressure vessel (RPV) embrittlement. However, recent analyses indicate that in newer style light water reactors, gamma damage can be a substantial fraction of the total displacement damage experienced by the (RPV); ignoring this damage will lead to errors in embrittlement predictions. Furthermore, gamma rays may be more efficient than fast neutrons at producing freely-migrating defects and as such can impact certain embrittlement mechanisms more effectively than fast neutrons. Consideration of these gamma effects are therefore essential for a more complete understanding of radiation embrittlement.
Date:
September 1, 1996
Creator:
Alexander, D. E. & Rehn, L. E.
Object Type:
Article
System:
The UNT Digital Library
HRTEM analysis of solid precipitates in Xe-implanted aluminum
High-resolution TEM was carried out to determine shape and atomic arrangement of solid Xe precipitates in Al. Polycrystalline Al TEM specimens were implanted with 30 keV Xe{sup +} at RT to a dose of 3x10{sup 20} ions/m{sup 2} and then annealed at 523 K. Below a size 4 nm dia, the Xe precipitates are solid with an fcc crystal structure mesotacticly aligned with the Al lattice. In HRTEM along [011] projection, the difference in the lattice parameters of solid Xe and Al produces a precipitate image dominated by a 2-D Moire pattern that repeats in both the <001> and <111> directions every 3 Al (or 2 Xe) lattice spacings. Multi-slice image simulations, using a 3-D atomic model, demonstrates that the precipitates are tetradecahedra with faces parallel to the dense {l_brace}111{r_brace} planes and the {l_brace}100{r_brace} planes. Off-Bragg illumination of the precipitates minimizes Al lattice fringes and generates precipitate images which are in good agreement with the model.
Date:
September 1, 1996
Creator:
Allen, C.W.; Birtcher, R.; Ishikawa, N.; Furuya, K. & Awaji, M.
Object Type:
Article
System:
The UNT Digital Library
Operation and improvements of the Fermilab 400 MeV Linac
The 400 MeV Fermilab Linac Upgrade commissioning began August 28, 1993. High energy physics collider operation (run 1b) began in November 1993 and ended March 1, 1996. The Linac, operating at 98% reliability, provided 400 MeV H{sup -} beam to the Booster and 66 MeV H{sup -} beam to the Neutron Therapy Facility. During this time, the beam intensity, which initially was administratively set to 35 MA, rose to a peak of 50 mA while losses decreased significantly. This paper discusses the Linac operation and reliability since the Upgrade.
Date:
September 1, 1996
Creator:
Allen, L.J.; Popovic, M. & Schmidt, C.W.
Object Type:
Article
System:
The UNT Digital Library
Flow calculations for Yucca Mountain groundwater travel time (GWTT-95)
In 1983, high-level radioactive waste repository performance requirements related to groundwater travel time were defined by NRC subsystem regulation 10 CFR 60.113. Although DOE is not presently attempting to demonstrate compliance with that regulation, understanding of the prevalence of fast paths in the groundwater flow system remains a critical element of any safety analyses for a potential repository system at Yucca Mountain, Nevada. Therefore, this analysis was performed to allow comparison of fast-path flow against the criteria set forth in the regulation. Models developed to describe the conditions for initiation, propagation, and sustainability of rapid groundwater movement in both the unsaturated and saturated zones will form part of the technical basis for total- system analyses to assess site viability and site licensability. One of the most significant findings is that the fastest travel times in both unsaturated and saturated zones are in the southern portion of the potential repository, so it is recommended that site characterization studies concentrate on this area. Results support the assumptions regarding the importance of an appropriate conceptual model of groundwater flow and the incorporation of heterogeneous material properties into the analyses. Groundwater travel times are sensitive to variation/uncertainty in hydrologic parameters and in infiltration flux …
Date:
September 1, 1996
Creator:
Altman, S. J.; Arnold, B. W.; Barnard, R. W.; Barr, G. E.; Ho, C. K.; McKenna, S. A. et al.
Object Type:
Report
System:
The UNT Digital Library
Disoriented chiral condensates in hadron-hadron collisions
The authors review recent progress in the description and understanding of disoriented chiral condensates. Certain important unsolved issues are underlined, and the preliminary results of the program of investigation of these issues in the framework of the classical linear sigma model are reported. They also briefly review a formalism which could be useful at the full non-equilibrium quantum field theory level of analysis.
Date:
September 1, 1996
Creator:
Amelino-Camelia, G.; Bjorken, J. D. & Larsson, S. E.
Object Type:
Article
System:
The UNT Digital Library
Southwest Retort, Volume 50, Number 1, September 1996
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
September 1996
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Report of the Supersymmetry Theory Subgroup
We provide a mini-guide to some or the possible manifestations of weak scale supersymmetry. For each of six scenarios we provide: a brief description of the theoretical underpinnings, the adjustable parameters, a qualitative description of the associated phenomenology at future colliders, comments on how to simulate each scenario with existing event generators,
Date:
September 17, 1996
Creator:
Amundson, J.; Anderson, G. & Baer, H.
Object Type:
Article
System:
The UNT Digital Library
DST pitting annual report
This report provides details of activities during FY 1996 for the double-shell tank pitting kinetics testing task.
Date:
September 30, 1996
Creator:
Anantatmula, R.P.
Object Type:
Report
System:
The UNT Digital Library
Metal plasma immersion ion implantation and deposition: A review
Metal Plasma Immersion Ion Implantation and Deposition (MePIIID) is a hybrid process combining cathodic arc deposition and plasma immersion ion implantation. The properties of metal plasma produced by vacuum arcs are reviewed and the consequences for MePIIID are discussed. Different version of MePIIID are described and compared with traditional methods of surface modification such as ion beam assisted deposition (IBAD). MePIIID is a very versatile approach because of the wide range of ion species and energies used. In one extreme case, films are deposited with ions in the energy range 20--50 eV, and at the other extreme, ions can be implanted with high energy (100 keV or more) without film deposition. Novel features of the technique include the use of improved macroparticle filters; the implementation of several plasma sources for multi-element surface modification; tuning of ion energy during implantation and deposition to tailor the substrate-film intermixed layer and structure of the growing film; simultaneous pulsing of the plasma potential (positive) and substrate bias (negative) with a modified Marx generator; and the use of high ion charge states.
Date:
September 1, 1996
Creator:
Anders, A.
Object Type:
Article
System:
The UNT Digital Library
X-Ray Ablation Measurements and Modeling for ICF Applications
X-ray ablation of material from the first wall and other components of an ICF (Inertial Confinement Fusion) chamber is a major threat to the laser final optics. Material condensing on these optics after a shot may cause damage with subsequent laser shots. To ensure the successful operation of the ICF facility, removal rates must be predicted accurately. The goal for this dissertation is to develop an experimentally validated x-ray response model, with particular application to the National Ignition Facility (NIF). Accurate knowledge of the x-ray and debris emissions from ICF targets is a critical first step in the process of predicting the performance of the target chamber system. A number of 1-D numerical simulations of NIF targets have been run to characterize target output in terms of energy, angular distribution, spectrum, and pulse shape. Scaling of output characteristics with variations of both target yield and hohlraum wall thickness are also described. Experiments have been conducted at the Nova laser on the effects of relevant x-ray fluences on various materials. The response was diagnosed using post-shot examinations of the surfaces with scanning electron microscope and atomic force microscope instruments. Judgments were made about the dominant removal mechanisms for each material. Measurements …
Date:
September 1, 1996
Creator:
Anderson, A. T.
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
The History of the 200 Area Burial Ground Vacilities Volume 2
None
Date:
September 25, 1996
Creator:
Anderson, J. D.
Object Type:
Report
System:
The UNT Digital Library
Statistical evaluation of CTBT regional seismic monitoring
A global seismic monitoring system under a Comprehensive Test Ban Treaty (CTBT) is judged by its capability to detect, locate, and identify suspicious seismic events. Performance measures are those statistical objects that describe these capabilities. Performance criteria are the thresholds derived from the overall monitoring system goals, against which the evaluated performance measures are compared. This report proposes statistical objects for performance measurement of detection and location, a continuation of the research of Anderson and Anderson. A statistical methodology for calibrating regional station magnitudes to the worldwide teleseismic Mb scale is also proposed.
Date:
September 1, 1996
Creator:
Anderson, K.K.
Object Type:
Report
System:
The UNT Digital Library
Fabrication and characterization of aluminum heavy liners for the pulse power systems of the high energy density physics program at Los Alamos
Aluminum heavy liners of three basic types have been fabricated for Los Alamos pulse power experiments. The first fabrications used a conventional hand operated lathe with high speed steel cutting tools. More recent fabrications have used numerically controlled lathes with carbide insert cutting tools. A numerically controlled Pneumo lathe with an air bearing spindle and with air bearing cross slides has been used to fabricate the most recent examples of the 3.2 gm Pegasus Precision Liner that is normally accelerated to 3 mm/{micro}s for experiments at the Pegasus II pulse power facility. The basic dimensions, including wall thickness, of fourteen of these parts have been characterized by an automated inspection machine. Liner surface finishes are measured directly by stylus profilometer and by optical interferometric analysis of cast polymeric replicas. Statistics of these measurements will be presented. Plans for future fabrication of similar and larger liners with increasingly stringent specification of wall thickness and of surface finish are described along with corresponding plans for liner characterization improvements.
Date:
September 1, 1996
Creator:
Anderson, W. E.; Day, R. D.; Bartos, J. J.; Garcia, F. P.; Hatch, D. J. & Hannah, P. R.
Object Type:
Article
System:
The UNT Digital Library
Technology Development, Evaluation, and Application (TDEA) FY 1995 progress report - Environmental, Safety, and Health (ESH) division
This report covers six months of effort, including startup time. Five projects were supported by the division: Pilot Program for the Risk-Based Surveillance of Lung Cancer in Los Alamos National Laboratory Workers, Optimization of Placement of Workplace Continuous Air Monitoring Instrumentation, A Polymeric Barrier Monitor to Protect Workers, Evaluation of a Real-Time Beryllium Detection Instrument and the Implications of Its Use, and High-Energy Dosimetry. A project summary for each is provided. An appendix to the report includes the 1995 Request for Proposals, Committee Members, Priority Technical Areas of Interest for FY95, Relative Prioritization and Weighting Factors, Format for Proposals, and Charter.
Date:
September 1, 1996
Creator:
Andrews, L. Larry
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with Jacob Bekker, September 28, 1996
Access:
Use of this item is restricted to the UNT Community
Interview with Jacob Bekker, a Holocaust survivor from Warsaw, Poland. Bekker discusses his upbringing, life for Jews in Warsaw before the war, antisemitism in Warsaw and discrimination, the invasion of Poland, Germans and Poles identifying Jews and singling them out for labor, fleeing to Russia and working there, returning to Poland after the war, and leaving for Israel.
Date:
September 28, 1996
Creator:
Anson, Jennifer & Bekker, Jacob
Object Type:
Book
System:
The UNT Digital Library
PAMTRAK: A system to monitor high value objects and personnel in restricted areas
The US Department of Energy (DOE) uses sensitive or classified parts and material that must be protected and accounted for. The authors believe there is a need for an automated system that can help protect and monitor these parts and material. In response to this need Sandia National Laboratories (SNL) has developed a real-time personnel and material tracking system called PAMTRAK that has been installed at selected DOE facilities. PAMTRAK safeguards sensitive parts and material by tracking tags worn by personnel and by monitoring sensors attached to the parts or material. This paper describes the goals when designing PAMTRAK, the PAMTRAK system components, the current installations, and the benefits a site can expect when using PAMTRAK.
Date:
September 1, 1996
Creator:
Anspach, D. A.; Walters, B. G.; Anspach, J. P. & Crain, B. Jr.
Object Type:
Article
System:
The UNT Digital Library
Evaluation of dredged material proposed for ocean disposal from Shark River Project area
The objective of the Shark River Project was to evaluate proposed dredged material to determine its suitability for unconfined ocean disposal at the Mud Dump Site. Tests and analyses were conducted on the Shark River sediments. The evaluation of proposed dredged material consisted of bulk sediment chemical and physical analysis, chemical analyses of dredging site water and elutriate, water-column and benthic acute toxicity tests, and bioaccumulation tests. Individual sediment core samples collected from the Shark River were analyzed for grain size, moisture content, and total organic carbon (TOC). One sediment composite was analyzed for bulk density, specific gravity, metals, chlorinated pesticides, polychlorinated biphenyl (PCB) congeners, polynuclear aromatic hydrocarbons (PAHs), and 1,4- dichlorobenzene. Dredging site water and elutriate, prepared from suspended-particulate phase (SPP) of the Shark River sediment composite, were analyzed for metals, pesticides, and PCBs. Benthic acute toxicity tests and bioaccumulation tests were performed.
Date:
September 1, 1996
Creator:
Antrim, L. D.; Gardiner, W. W.; Barrows, E. S. & Borde, A. B.
Object Type:
Report
System:
The UNT Digital Library
Do-It-Now building maintenance reengineering project
The Do-It-Now (DIN) building maintenance system is proposed to reduce the cost of routine building maintenance and repairs and to improve customer satisfaction with maintenance services. DIN uses a team approach to periodically inspect buildings and provide maintenance services on the spot. It emphasizes communications between the customers and the craftspeople performing the work. The system was designed using a reengineering approach that characterized the existing maintenance work control system, analyzed comparable systems in other DOE laboratories, envisioned an ideal system, and proposed a workable, testable system for initial implementation. At each stage, input was solicited from customer representatives and Facilities management to ensure meeting customer requirements with an implementable system.
Date:
September 1, 1996
Creator:
Apoddaca, L.; Ayotte, A.; Coffman, J.; Dukes, L.; Jojola, S.; Kadlec, J. et al.
Object Type:
Report
System:
The UNT Digital Library
Canton Lake
Photograph of a scene on Canton Lake.
Date:
September 19, 1996
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Canton Lake
Photograph of a scene on Canton Lake.
Date:
September 19, 1996
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
Canton Lake
Photograph of a scene on Canton Lake.
Date:
September 19, 1996
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History