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Development of the pulse transformer for NLC klystron pulse modulator

Description: We have studied a conventional pulse transformer for the NLC klystron pulse modulator. The transformer has been analyzed using a simplified lumped circuit model. It is found that a fast rise time requires low leakage inductance and low distributed capacitance and can be realized by reducing the number of secondary turns, but it produces larger pulse droop and core size. After making a tradeoff among these parameters carefully, a conventional pulse transformer with a rise time of 250ns and pulse… more
Date: May 1, 1997
Creator: Akemoto, M.; Gold, S.; Koontz, R. & Krasnykh, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pulse transformer R and D for NLC klystron pulse modulator

Description: The authors have studied a conventional pulse transformer for the NLC klystron pulse modulator. The transformer has been analyzed using a simplified lumped circuit model. It is found that a fast rise time requires low leakage inductance and low distributed capacitance and can be realized by reducing the number of secondary turns, but it produces larger pulse droop and requires a larger core size. After making a tradeoff among these parameters carefully, a conventional pulse transformer with a r… more
Date: July 1, 1997
Creator: Akemoto, M.; Gold, S.; Krasnykh, A. & Koontz, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sonic temperature sensor for food processing

Description: The lack of adequate temperature measurement is the major barrier to the development of more efficient and better quality food processing methods. The objective of the sonic temperature sensor for food processing project is to develop a prototype sensor to noninvasively measure the interior temperature of particulate foods during processing. This, a joint project with the National Food Processors Association, utilizes the property of materials that when the temperature of a material changes, th… more
Date: September 1, 1997
Creator: Akers, D. W.; Porter, A. M. & Tow, D. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Sonic Temperature Sensor for Food Processing

Description: The lack of adequate temperature measurement is the major barrier to the development of more efficient and better quality food processing methods. The objective of the sonic temperature sensor for food processing project is to develop a prototype sensor system to noninvasively measure the interior temperature of particulate foods during processing. The development of the prototype sensor is a collaborative project with the National Food Processors Association. The project is based on the proper… more
Date: September 1, 1997
Creator: Akers, D. W.; Porter, A. M. & Tow, D. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cost analysis of energy storage systems for electric utility applications

Description: Under the sponsorship of the Department of Energy, Office of Utility Technologies, the Energy Storage System Analysis and Development Department at Sandia National Laboratories (SNL) conducted a cost analysis of energy storage systems for electric utility applications. The scope of the study included the analysis of costs for existing and planned battery, SMES, and flywheel energy storage systems. The analysis also identified the potential for cost reduction of key components.
Date: February 1, 1997
Creator: Akhil, A.; Swaminathan, S. & Sen, R.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The seismology of geothermal regimes. Final report

Description: The authors have been developing seismological interpretation theory and methods applicable to complex structures encountered in geothermal areas for a better understanding of the earth`s geothermal regimes. The questions the y have addressed in their research may be summarized as ``What is going on in the earth`s crust under tectonically active regions; what are the structures and processes responsible for such activities as earthquakes and volcanic eruptions; and how can one capture their ess… more
Date: April 1, 1997
Creator: Aki, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MAGNETO-CHEMICAL CHARACTER STUDIES OF NOVEL FE CATALYSTS FOR COAL LIQUEFACTION

Description: Co-precipitation is the major method proposed for synthesis of molybdenum oxide supported Fe, Fe/Co, and Fe/Cu catalysts. However, many variables may effect the particle size and surface properties of the synthesized catalysts, such as pH of molybdate solution, precipitation temperature and pH, Fe/Mo atomic ratio, pH of the washing solution, aging of the freshly prepared samples, and the length and temperature of calcination. In this period, we have been working on precipitation between iron(II… more
Date: October 1, 1997
Creator: Akundi, Murty A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Literature search on the use of resins for treatment of radioactive wastes

Description: Over 100 commercial providers with mixed-waste treatability capabilities exist in the US. The maturity level of these technologies varies from a bench scale to a pilot or a commercial scale. The techniques include deactivation, chemical oxidation, recovery of metals, stabilization, vitrification, incineration, biodegradation, and chemical extraction. This report focuses on the use of resins to remove actinides and heavy metals from aqueous waste streams. Only the literature that described resin… more
Date: October 1, 1997
Creator: AlMahamid, I. & Smith, B.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A new mechanistic model of critical heat flux in forced-convection subcooled boiling

Description: Because of its practical importance and various industrial applications, the process of subcooled flow boiling has attracted a lot of attention in the research community in the past. However, the existing models are primarily phenomenological and are based on correlating experimental data rather than on a first-principle analysis of the governing physical phenomena. Even though the mechanisms leading to critical heat flux (CHF) are very complex, the recent progress in the understanding of local… more
Date: October 1, 1997
Creator: Alajbegovic, A.; Kurul, N.; Podowski, M. Z.; Drew, D. A. & Lahey, R. T., Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Probing Oxidative Degradation in Polymers Using {sup 17}O NMR Spectroscopy

Description: Understanding the mechanism of oxidative degradation remains an important goal in being able to predict the aging process in polymer materials. Nuclear magnetic resonance (NMR) spectroscopy has previously been utilized to investigate polymer degradation, including both proton ({sup 1}H) and carbon ({sup 13}C) studies. These previous NMR studies, as well as other spectroscopic investigations, are complicated by the almost overwhelming signal arising from the native undegraded polymer. This makes… more
Date: September 1, 1997
Creator: Alam, T. M.; Click, C. A. & Assink, R. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A novel biomarker for beryllium sensitization in humans. 1997 annual progress report

Description: 'Overall, this project is designed to identify the beryllium reactive T-cell clones that are proliferating in vivo in individuals sensitized to beryllium. The basic method for identifying such clones is the hprt T-cell mutation assay. The rationale is that in vivo proliferating T-lymphocytes are more likely to undergo hprt mutations and/or be included in hprt mutant fractions of T-cells isolated from peripheral blood. T-lymphocytes isolated as hprt mutants from beryllium sensitized individuals … more
Date: January 1, 1997
Creator: Albertini, R.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Modeling the wind-fields of accidental releases by mesoscale forecasting

Description: Modeling atmospheric releases even during fair weather can present a sever challenge to diagnostic, observed-data-driven, models. Such schemes are often handicapped by sparse input data from meteorological surface stations and soundings. Forecasting by persistence is only acceptable for a few hours and cannot predict important changes in the diurnal cycle or from synoptic evolution. Many accident scenarios are data-sparse in space and/or time. Here we describe the potential value of limited-are… more
Date: July 1, 1997
Creator: Albritton, J. R.; Lee, R. L.; Mobley, R. L.; Pace, J. C.; Hodur, R. A. & Lion, C. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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QCD in hadron-hadron collisions

Description: Quantum Chromodynamics provides a good description of many aspects of high energy hadron-hadron collisions, and this will be described, along with some aspects that are not yet understood in QCD. Topics include high E{sub T} jet production, direct photon, W, Z and heavy flavor production, rapidity gaps and hard diffraction.
Date: March 1, 1997
Creator: Albrow, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hard diffraction in CDF

Description: The aim of these studies is to use hard (large Q{sup 2}) processes to investigate the partonic nature of the pomeron. We have measured events with large rapidity gaps between balancing high E{sub T} jets, events with two forward (same-side) jets and a large gap (diffractive di-jet production), diffractive W{sup {+-}} production and diffractive heavy flavor (J/{psi} and b-quark) production. Candidate events of the type double-pomeron {yields} di-jet are observed. I close with a look at the futur… more
Date: October 1, 1997
Creator: Albrow, M.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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VIIth Blois Workshop summary: experimental

Description: The Blois Workshop has become a conference not just restricted to diffractive scattering, but including topics such as searches for SUSY and Higgs, measurements of the top mass and b-decays. I will mention these briefly but will mostly discuss new results (and needed future measurements) in hard diffraction at HERA and the Tevatron.
Date: October 1, 1997
Creator: Albrow, M.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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QCD subgroup on diffractive and forward physics

Description: Over the last few years, there has been a resurgence of interest in small-x or diffractive physics. This has been due to the realization that perturbative QCD techniques may be applicable to what was previously thought of as a non-perturbative problem and to the opening up of new energy regimes at HERA and the Tevatron collider. The goal is to understand the pomeron, and hence the behavior of total cross sections, elastic scattering and diffractive excitation, in terms of the underlying theory,… more
Date: September 1, 1997
Creator: Albrow, M.G.; Baker, W. & Bhatti, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Magnetic gauge instrumentation on the LANL gas-driven two-stage gun

Description: The LANL gas-driven two-stage gun was designed and built to do initiation studies on insensitive high explosives as well as equation of state and reaction experiments on other materials. The preferred method of measuring reaction phenomena involves the use of in-situ magnetic particle velocity gauges. In order to accommodate this type of gauging in the two-stage gun, it has a 50-mm-diameter launch tube. The authors have sued magnetic gauging on the 72-mm bore diameter single-stage gun for over … more
Date: November 1, 1997
Creator: Alcon, R. R.; Sheffield, S. A.; Martinez, A. R. & Gustavsen, R. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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English as the Official Language of the United States: An Overview

Description: This report provides background on contemporary efforts to declare English the official language, a review of selected issues raised by official English proposals in Congress, and a summary of arguments that have been advanced in favor of and in opposition to such proposals.
Date: April 1, 1997
Creator: Aleman, Steven R.; Bruno, Andorra & Dale, Charles V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Progress on an EBIS for RHIC

Description: Work is continuing on the development of an Electron Beam Ion source (EBIS) which could be used as part of a new heavy ion injector for RHIC. On a test EBIS, the authors have operated with an electron beam current of up to 1.14A, and have extracted ions such as Tl{sup 41+}, Xe{sup 26+}, Ar{sup 14+}, N{sup 7+}, and Na{sup 7+}. Recent experimental results are reported. In addition, they discuss plans for a new electron beam test stand that is now being built. This will allow operation with electr… more
Date: July 1, 1997
Creator: Alessi, J.; Beebe, E.; Hershcovitch, A.; Kponou, A.; Lockey, R.; Pikin, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Report on the workshop on ion sources for hadron colliders

Description: A workshop on Ion Sources for Hadron Colliders was held September 4--5, 1997 in Gelnhausen, Germany. This workshop, organized by the WE-Heraeus-Stiftung Foundation, the University of Frankfurt, Brookhaven National Laboratory, and CERN, directly followed the 7th Symposium on Electron Beam Ion Sources and Traps. Various options were reviewed for the development of a high current, intermediate charge state heavy ion source for use on colliders such as RHIC and LHC. In addition to status reports on… more
Date: November 1, 1997
Creator: Alessi, J.G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The microstructure and mechanical reliability of alumina scales and coatings

Description: Alumina scales on iron-aluminides (Fe{sub 3}Al-based) and NiCrAl- based alloys were characterized in order to develop the knowledge to control the oxidation performance of alloys by controlling the microstructure and microchemistry of their scales. Plasma-deposited amorphous alumina coatings on iron-aluminides were used to study phase transformations, transport processes in the scales, and S segregation to the scale/metal interface. It was found that during heat treatment in absence of oxidatio… more
Date: September 1, 1997
Creator: Alexander, K.B.; Pruessner, K. & Tortorelli, P.F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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COATINGS FOR PROTECTION OF EQUIPMENT FOR BIOCHEMICAL PROCESSING OF GEOTHERMAL RESIDUES: PROGRESS REPORT FY 97

Description: Thermal sprayed ethylene methacrylic acid (EMAA) and ethylene tetrafluoroethylene (ETFE), spray-and-bake ETFE and polyvinylidene fluoride (PVDF) and brushable ceramic-epoxy coatings were evaluated for corrosion protection in a biochemical process to treat geothermal residues. The findings are also relevant to other moderate temperature brine environments where corrosion is a problem. Coupon, Atlas cell, peel strength, cathodic disbondment and abrasion tests were performed in aggressive environm… more
Date: November 1, 1997
Creator: Allan, M. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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