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Design and Construction of the PEP-II Low Energy Ring

Description: We describe the design and construction status of theLow-Energy Ring (LER) of the PEP-II project, a collaboration of SLAC,LBNL, and LLNL. In the past year we have optimized LER parameters andstarted component fabrication. By reusing the original wigglers, we wereable to simplify the design of the distributed wiggler photon dump, whichmust dissipate 260 kW of power. The number of RF stations (eachcomprising a klystron powering two 476-MHz cavities) was reduced from 4to 3. We have begun fabricati… more
Date: June 1, 1996
Creator: Hsieh, H.; Yourd, R. & Zisman, M. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design and Fabrication of a High Aspect Ratio Cable for a High Gradie nt Quadrupole Magnet

Description: The Large Hadron Collider interaction regions require quadrupoles with a 70 mm diameter bore, a gradient of 250 T/m, and good cooling so that the magnets can operate in a high radiation background without quenching. In order to meet these stringent requirements, a two-layer magnet with a high aspect ratio cable has been designed. This cable ulilizes the SSC inner and outer layer strands, which have been optimized and are available in large quantities. The initial design parameters for both cabl… more
Date: December 12, 1996
Creator: Scanlan, R. M.; McInturff, A. D.; Taylor, C. E.; Caspi, S.; Dell'Orco, D.; Higley, H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Sol gel based fiber optic sensor for blook pH measurement

Description: This paper describes a fiber-optic pH sensor based upon sol-gel encapsulation of a self-referencing dye, seminaphthorhodamine-1 carboxylate (SNARF-1C). The simple sol-gel fabrication procedure and low coating leachability are ideal for encapsulation and immobilization of dye molecules onto the end of an optical fiber. A miniature bench-top fluorimeter system was developed for use with the optical fiber to obtain pH measurements. Linear and reproducible responses were obtained in human blood in … more
Date: December 19, 1996
Creator: Grant, S. A. & Glass, R. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Single-Point Diamond Turning of Lead Indium Phosphate Glass

Description: The development of the ability to routinely machine glass materials to optical tolerances is highly desirable and, in particular, could provide new degrees of control over the precise shape of complex and unusual optical surfaces. Of particular interest in this regard is the formation of non-spherical shapes where there is a need to fabricate both inexpensive, low-precision optics as well as specialized high-precision aspheric components. This work describes the initial feasibility tests of the… more
Date: August 1, 1996
Creator: Allison, S. W.; Cunningham, J. P.; Rajic, S.; Boatner, L. A. & Sales, B. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Lightweight composite fighting cover prototype development program

Description: The U.S. Army Field Assistance Science and Technology Program requested Oak Ridge National Laboratory (ORNL) to demonstrate the use of lightweight composite materials in construction of overhead covers for reinforced infantry fighting positions. In recent years, ORNL researchers have designed and tested several concepts for lightweight ballistic protection structures, and they have developed numerous prototype composite structures for military and civilian applications. In the current program, … more
Date: July 1, 1996
Creator: Wrenn, G. E., Jr.; Frame, B. J.; Gwaltney, R. C. & Akerman, M. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Lapped substrate for enhanced backsurface reflectivity in a thermophotovoltaic energy conversion system

Description: A method is described for fabricating a thermophotovoltaic energy conversion cell including a thin semiconductor wafer substrate having a thickness ({beta}) calculated to decrease the free carrier absorption on a heavily doped substrate; wherein the top surface of the semiconductor wafer substrate is provided with a thermophotovoltaic device, a metallized grid and optionally an antireflective (AR) overcoating; and, the bottom surface (10 ft) of the semiconductor wafer substrate is provided with… more
Date: December 31, 1996
Creator: Baldasaro, Paul F.; Brown, Edward J.; Charache, Greg W. & DePoy, David M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
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Measurement of Gas Transport Properties for Chemical Vapor Infiltration

Description: In the chemical vapor infiltration (CVI) process for fabricating ceramic matrix composites (CMCs), transport of gas phase reactant into the fiber preform is a critical step. The transport can be driven by pressure or by concentration. This report describes methods for measuring this for CVI preforms and partially infiltrated composites. Results are presented for Nicalon fiber cloth layup preforms and composites, Nextel fiber braid preforms and composites, and a Nicalon fiber 3-D weave composite… more
Date: December 1, 1996
Creator: Starr, T. L. & Hablutzel, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of high-activity {sup 252}Cf sources for neutron brachytherapy

Description: The Gershenson Radiation Oncology Center of Wayne State University (WSU), Detroit, Michigan, is using {sup 252}Cf medical sources for neutron brachytherapy. These sources are based on a 20-year-old design containing {le} 30 {micro}g {sup 252}Cf in the form of a cermet wire of Cf{sub 2}O{sub 3} in a palladium matrix. The Radiochemical Engineering Development Center (REDC) of Oak Ridge National Laboratory has been asked to develop tiny high-activity {sup 252}Cf neutron sources for use with remote… more
Date: October 1, 1996
Creator: Martin, R. C.; Laxson, R. R.; Miller, J. H.; Wierzbicki, J. G.; Rivard, M. J. & Marsh, D. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Field test of single well DNAPL characterization using alcohol injection/extraction

Description: Soils and groundwater beneath an abandoned process sewer line in the A/M Area of the Savannah River Site (SRS) contain elevated levels of volatile organic compounds, specifically trichloroethylene (TCE) and tetrachloroethylene (PCE), two common chlorinated solvents. These compounds have low aqueous solubilities, thus when released to the subsurface in sufficient quantity, tend to exist as immiscible fluids or nonaqueous phase liquids (NAPLs). Because chlorinated solvents are also denser than wa… more
Date: October 29, 1996
Creator: Jerome, K. M.; Looney, B. B.; Rhoden, M. L.; Riha, B. & Burdick, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design, performance and production of the Fermilab TESLA RF input couplers

Description: The TeV Energy Superconducting Linear Accelerator (TESLA) requires as one of its technical components a radiofrequency (rf) input coupler that transfers 1.3 GHz rf energy from the rf distribution system to a nine-cell superconducting accelerating cavity operating at a temperature of 1.8 K. The input coupler design is driven by numerous design criteria, which result in a rather complicated implementation. The production of twelve input couplers for the TESLA Test Facility (TTF) is underway at Fe… more
Date: October 1, 1996
Creator: Champion, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Cost effectiveness of silent discharge plasma for point-of-use VOC emissions control in semiconductor fabrication

Description: Extensive research into the treatment and control of Volatile Organic Compounds (VOCs) from semiconductor industry manufacturing processes has identified the need for alternatives to existing combustion devices. Specifically, semiconductor manufacturing design is moving toward the application of effective, small-scale, abatement control technologies for specific point-of-use (POU) waste streams associated with a particular component or manufacturing tool. The consortium of companies involved in… more
Date: December 11, 1996
Creator: Cummings, M. & Booth, S.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Parametric study on the solderability of etched PWB copper

Description: The rapid advancement of interconnect technology has resulted in a more engineered approach to designing and fabricating printed wiring board (PWB) surface features. Recent research at Sandia National Laboratories has demonstrated the importance of surface roughness on solder flow. This paper describes how chemical etching was used to enhance the solderability of surfaces that were normally difficult to wet. The effects of circuit geometry, etch concentration, and etching time on solder flow ar… more
Date: October 1, 1996
Creator: Hosking, F. M.; Stevenson, J. O. & Hernandez, C. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The use of helical dipole magnets in the RHIC spin project

Description: Superconducting helical dipole magnets will be used in RHIC to maintain polarization and to perform localized spin rotations at the two major experimental detector regions. Requirements for the helical dipole system are discussed, and the status of magnet prototypes is reported.
Date: December 31, 1996
Creator: Courant, E.; Fischer, W. & Luccio, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Y-12 Development Organization technical progress report. Metal process, Part 3

Description: Clad vent set (CVS) cups were ground in the closure-weld zone to reduce the wall-thickness variation created by the cup deep-drawing process. A significantly more uniform wall thickness would be beneficial for the CVS closure-weld operation. The goal was to reduce the average within-cup wall-thickness variation (defined as the range of wall thicknesses in the closure-weld zone) approximately 50% from the Cassini production value of 42 {mu}m. This goal was shown to be achievable but, unfortunate… more
Date: April 1, 1996
Creator: Northcutt, W.G. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nuclear fuels technologies Fiscal Year 1996 research and development test results

Description: During fiscal year 1996, the Department of Energy`s Office of Fissile Materials Disposition (OFMD) funded Los Alamos National Laboratory (LANL) to investigate issues associated with the fabrication of plutonium from dismantled weapons into mixed-oxide (MOX) nuclear fuel for disposition in nuclear power reactors. These issues can be divided into two main categories: issues associated with the fact that the plutonium from dismantled weapons contains gallium, and issues associated with the unique … more
Date: November 1, 1996
Creator: Beard, C. A.; Blair, H. T.; Buksa, J. J.; Butt, D. P.; Chidester, K.; Eaton, S. L. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Design specifications for manufacturability of MCM-C multichip modules

Description: A comprehensive guide for ceramic-based multichip modules (MCMS) has been developed by AlliedSignal Federal Manufacturing & Technologies (FM&T) to provide manufacturability information for its customers about how MCM designs can be affected by existing process and equipment capabilities. This guide extends beyond a listing of design rules by providing information about design layout, low- temperature cofired ceramic (LTCC) substrate fabrication, MCM assembly and electrical testing Electrical me… more
Date: October 1, 1996
Creator: Blazek, R.; Desch, J.; Kautz, D. & Morgenstern, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Neutral beam processing of semiconductor materials

Description: This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The most important challenge facing the US and global microelectronics industry is to identify and develop the next generation of processing technology to produce device structures with dimensions substantially less than 0.25 microns. This project sought to develop controlled, contamination-free etching techniques that are more selective and less dama… more
Date: September 1, 1996
Creator: Cross, J. & Hoffbauer, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The fabrication of millimeter-wavelength accelerating structures

Description: There is a growing interest in the development of high gradient ({ge} 1 GeV/m) accelerating structures. The need for high gradient acceleration based on current microwave technology requires the structures to be operated in the millimeter wavelength. Fabrication of accelerating structures at millimeter scale with sub-micron tolerances poses great challenges. The accelerating structures impose strict requirements on surface smoothness and finish to suppress field emission and multipactor effects… more
Date: November 1, 1996
Creator: Chou, P.J.; Bowden, G.B. & Copeland, M.R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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3D Oxide/Oxide Composite Filter

Description: Hot gas particulate filters are key components for the successful commercialization of advanced coal-based power-generation systems such as Pressurized Fluidized-bed Combustion (PFBC), including second- generation PFBC, and Integrated Gasification Combined Cycles (IGCC). Current generation monolithic ceramic filters are subject to catastrophic failure because they have very low resistance to crack propagation. To overcome this problem, a damage -tolerant ceramic filter element is needed. Westin… more
Date: December 1996
Creator: Lane, J. E.; LeCostaouec, J.; Painter, C. J.; Su, Wei-Fang A. & Radford, K. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Investigation and demonstration of dry carbon-based sorbent injection for mercury control. Quarterly technical report, April 1--June 30, 1996

Description: The overall objective this two phase program is to investigate the use of dry carbon-based sorbents for mercury control. During Phase 1, a bench-scale field test device that can be configured as an electrostatic precipitator, a pulse-jet baghouse, or a reverse-gas baghouse has been designed and will be integrated with an existing pilot-scale facility at PSCo`s Comanche Station. Up to three candidate sorbents will then be injected into the flue gas stream upstream of the test device to determine… more
Date: July 27, 1996
Creator: Hunt, T.; Sjostrom, S.; Smith, J. & Chang, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Rutherford backscattering analysis of the failure of chlorine anodes

Description: Rutherford Backscattering Spectrometry, carried out at the ORNL Surface Modification And Characterization Collaborative Research Center (SMAC) facility, has been applied to the nondestructive analysis of RuO[sub 2]-TiO[sub 2] electrodes of 5000 Angstroms, which mimic the DSA anodes in composition and the method of preparation. Occidental Chemical Corporation provided electrodes, which had been subjected to life time testing in H[sub 2]S04 solution, for analysis by ORNL. The results were used to… more
Date: June 1, 1996
Creator: Vallet, C. E. & Tilak, B. V.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Ultrasensitive ultrasonic transducer studies

Description: This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). This project sought to continue development of the ultrasensitive ultrasonic transducers that won a 1994 R&D 100 Award. These transducers have a very smooth response across a broad frequency range and thus are extremely well- suited for resonant ultrasound spectroscopy as well as pulsed-echo and acoustic-emission applications. Current work on these tr… more
Date: September 1996
Creator: Dixon, R.; Darling, T. & Migliori, A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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A micromachined surface acoustic wave sensor for detecting inert gases

Description: Surface acoustic wave (SAW) sensors must be specifically designed for each application because many variables directly affect the acoustic wave velocity. In the present work, the authors have designed, fabricated, and tested an SAW sensor for detection of metastable states of He. The sensor consists of two sets of micromachined interdigitated transducers (IDTs) and delay lines fabricated by photolithography on a single Y-cut LiNbO{sub 3} substrate oriented for Z-propagation of the SAWs. One set… more
Date: December 31, 1996
Creator: Ahuja, S.; Hersam, M.; Ross, C.; Chien, H. T. & Raptis, A. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Nuclear fuels technologies fiscal year 1996 research and research development test results

Description: During fiscal year 1996, the Department of Energy`s Office of Fissile Materials Disposition (OFMD) funded Los Alamos National Laboratory (LANL) to investigate issues associated with the fabrication of plutonium from dismantled weapons into mixed-oxide (MOX) nuclear fuel for disposition in nuclear power reactors. These issues can be divided into two main categories: issues associated with the fact that the plutonium from dismantled weapons contains gallium, and issues associated with the unique … more
Date: November 8, 1996
Creator: Beard, C. A.; Blair, H. T.; Buksa, J. J. & Butt, D. P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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