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15,323 Matching Results
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Advanced computers and simulation
Accelerator physicists today have access to computers that are far more powerful than those available just 10 years ago. In the early 1980's, desktop workstations performed less one million floating point operations per second (Mflops), and the realized performance of vector supercomputers was at best a few hundred Mflops. Today vector processing is available on the desktop, providing researchers with performance approaching 100 Mflops at a price that is measured in thousands of dollars. Furthermore, advances in Massively Parallel Processors (MPP) have made performance of over 10 gigaflops a reality, and around mid-decade MPPs are expected to be capable of teraflops performance. Along with advances in MPP hardware, researchers have also made significant progress in developing algorithms and software for MPPS. These changes have had, and will continue to have, a significant impact on the work of computational accelerator physicists. Now, instead of running particle simulations with just a few thousand particles, we can perform desktop simulations with tens of thousands of simulation particles, and calculations with well over 1 million particles are being performed on MPPs. In the area of computational electromagnetics, simulations that used to be performed only on vector supercomputers now run in several hours on desktop …
Date:
January 1, 1993
Creator:
Ryne, R.D.
Object Type:
Article
System:
The UNT Digital Library
Advanced control system for the Integral Fast Reactor fuel pin processor
A computerized control system has been developed for the remotely-operated fuel pin processor used in the Integral Fast Reactor Program, Fuel Cycle Facility (FCF). The pin processor remotely shears cast EBR- reactor fuel pins to length, inspects them for diameter, straightness, length, and weight, and then inserts acceptable pins into new sodium-loaded stainless-steel fuel element jackets. Two main components comprise the control system: (1) a programmable logic controller (PLC), together with various input/output modules and associated relay ladder-logic associated computer software. The PLC system controls the remote operation of the machine as directed by the OCS, and also monitors the machine operation to make operational data available to the OCS. The OCS allows operator control of the machine, provides nearly real-time viewing of the operational data, allows on-line changes of machine operational parameters, and records the collected data for each acceptable pin on a central data archiving computer. The two main components of the control system provide the operator with various levels of control ranging from manual operation to completely automatic operation by means of a graphic touch screen interface.
Date:
January 1, 1993
Creator:
Lau, L. D.; Randall, P. F.; Benedict, R. W. & Levinskas, D.
Object Type:
Article
System:
The UNT Digital Library
Advanced metering techniques
The goal of the US Department of Energy Federal Energy Management Program (FEMP) is to facilitate energy-efficiency improvements at federal facilities. This is accomplished by a balanced program of technology development, facility assessment, and use of cost-sharing procurement mechanisms. Technology development focuses upon the tools and procedures used to identify and evaluate efficiency improvements. For facility assessment, FEMP provides metering equipment and trained analysts to federal agencies exhibiting a commitment to improve energy-use efficiency. To assist in implementing energy-efficiency measures, FEMP helps federal agencies with identifying efficiency opportunities and in implementing energy-efficiency and demand-side management programs at federal sites. As the lead laboratory for FEMP, Pacific Northwest Laboratory (PNL) provides technical assistance to federal agencies to better understand and characterize energy systems. The US Army Forces Command (FORSCOM) has tasked PNL to provide technical assistance to characterize and modernize energy systems at FORSCOM installations. As part of that technical assistance, PNL performed an in-depth examination of automatic meter-reading system technologies currently available. The operating characteristics and relative merits of all the major systems were reviewed in the context of applicability to federal installations. That review is documented in this report.
Date:
January 1, 1993
Creator:
Szydlowski, R.F.
Object Type:
Report
System:
The UNT Digital Library
Advanced metering techniques
The goal of the US Department of Energy Federal Energy Management Program (FEMP) is to facilitate energy-efficiency improvements at federal facilities. This is accomplished by a balanced program of technology development, facility assessment, and use of cost-sharing procurement mechanisms. Technology development focuses upon the tools and procedures used to identify and evaluate efficiency improvements. For facility assessment, FEMP provides metering equipment and trained analysts to federal agencies exhibiting a commitment to improve energy-use efficiency. To assist in implementing energy-efficiency measures, FEMP helps federal agencies with identifying efficiency opportunities and in implementing energy-efficiency and demand-side management programs at federal sites. As the lead laboratory for FEMP, Pacific Northwest Laboratory (PNL) provides technical assistance to federal agencies to better understand and characterize energy systems. The US Army Forces Command (FORSCOM) has tasked PNL to provide technical assistance to characterize and modernize energy systems at FORSCOM installations. As part of that technical assistance, PNL performed an in-depth examination of automatic meter-reading system technologies currently available. The operating characteristics and relative merits of all the major systems were reviewed in the context of applicability to federal installations. That review is documented in this report.
Date:
January 1, 1993
Creator:
Szydlowski, R. F.
Object Type:
Report
System:
The UNT Digital Library
Advanced Neutron Source (ANS) Project progress report FY 1992
This report discusses project management, research and development, design, and safety at the Advanced Neutron Source facility.
Date:
January 1, 1993
Creator:
Campbell, J. H.; Selby, D. L. & Harrington
Object Type:
Report
System:
The UNT Digital Library
Advanced Neutron Source (ANS) Project progress report FY 1992
This report discusses project management, research and development, design, and safety at the Advanced Neutron Source facility.
Date:
January 1, 1993
Creator:
Campbell, J. H.; Selby, D. L. & Harrington.
Object Type:
Report
System:
The UNT Digital Library
Advanced oxidation and reduction processes: Closed-loop applications for mixed waste
At Los Alamos we are engaged in applying innovative oxidation and reduction technologies to the destruction of hazardous organics. Non thermal plasmas and relativistic electron-beams both involve the generation of free radicals and are applicable to a wide variety of mixed waste as closed-loop designs can be easily engineered. Silent discharge plasmas (SDP), long used for the generation of ozone, have been demonstrated in the laboratory to be effective in destroying hazardous organic compounds and offer an altemative to existing post-incineration and off-gas treatments. SDP generates very energetic electrons which efficiently create reactive free radicals, without adding the enthalpy associated with very high gas temperatures. A SDP cell has been used as a second stage to a LANL designed, packed-bed reactor (PBR) and has demonstrated DREs as high as 99.9999% for a variety of combustible liquid and gas-based waste streams containing scintillation fluids, nitrates, PCB surrogates, and both chlorinated and fluorinated solvents. Radiolytic treatment of waste using electron-beams and/or bremsstrahlung can be applied to a wide range of waste media (liquids, sludges, and solids). The efficacy and economy of these systems has been demonstrated for aqueous waste through both laboratory and pilot scale studies. We win present recent experimental and …
Date:
January 1, 1993
Creator:
Coogan, J. J.; Tennant, R. A.; Rosocha, L. A. & Wantuck, P. J.
Object Type:
Article
System:
The UNT Digital Library
Advanced power systems featuring a closely coupled catalytic gasification carbonate fuel cell plant
Pursuing the key national goal of clean and efficient uulization of the abundant domestic coal resources for power generation, a study was conducted with DOE/METC support to evaluate the potential of integrated gasification/carbonate fuel cell power generation systems. By closely coupling the fuel cell with the operation of a catalytic gasifier, the advantages of both the catalytic gasification and the high efficiency fuel cell complement each other, resulting in a power plant system with unsurpassed efficiencies approaching 55% (HHV). Low temperature catalytic gasification producing a high methane fuel gas offers the potential for high gas efficiencies by operating with minimal or no combustion. Heat required for gasification is provided by combination of recycle from the fuel cell and exothermic methanation and shift reactions. Air can be supplemented if required. In combination with internally reforming carbonate fuel cells, low temperature catalytic gasification can achieve very attractive system efficiencies while producing extremely low emissions compared to conventional plants utilizing coal. Three system configurations based on recoverable and disposable gasification catalysts were studied. Experimental tests were conducted to evaluate these gasification catalysts. The recoverable catalyst studied was potassium carbonate, and the disposable catalysts were calcium in the form of limestone and iron in …
Date:
January 1, 1993
Creator:
Steinfeld, G. & Wilson, W.G.
Object Type:
Article
System:
The UNT Digital Library
Advanced separation technology for flue gas cleanup. [Hollow fibers]
In the fourth quarter of 1992, we continued work on Tasks 2, 3, and 4. In Task 2, we continued preparation of the reversible absorption apparatus for measuring SO[sub 2] and NO[sub x] solubilities. We received and installed the gas cabinet necessary for safe handling of these gases and made several modifications to the reversible absorption apparatus aimed at reducing the time required for each measurement. We also began evaluating chromatography columns for their ability to separate SO[sub 2], N[sub 2], and O[sub 2]. In Task 3, we synthesized three polymers of dimethylangline (DMA). The first, an oligomer of DMA, resulted in an insoluble (to most solvents) solid that is unsuitable for use as an absorbent. In order to produce a liquid material, we synthesized several DMA copolymers. A 50:50 (mole ratio) copolymer of N-phenylaziridine and propyleneimine also resulted in a solid; however, reducing the N-phenylaziridine to propyleneimine ratio to 30:70 produced a liquid at room temperature. Fourteen grams of the 30:70 copolymer were, prepared for absorption measurements. In Task 4, we performed three sets of BFC experiments. The objective of the first two sets was to determine the liquid phase mass transfer coefficient and the objective of the third …
Date:
January 1, 1993
Creator:
Gottschlich, D.E.
Object Type:
Report
System:
The UNT Digital Library
Advanced Test Reactor probabilistic risk assessment
This report discusses Level 1 probabilistic risk assessment (PRA) incorporating a full-scope external events analysis which has been completed for the Advanced Test Reactor (ATR) located at the Idaho National Engineering Laboratory.
Date:
January 1, 1993
Creator:
Atkinson, S. A.; Eide, S .A.; Khericha, S. T. & Thatcher, T. A.
Object Type:
Article
System:
The UNT Digital Library
Advanced Test Reactor probabilistic risk assessment
This report discusses Level 1 probabilistic risk assessment (PRA) incorporating a full-scope external events analysis which has been completed for the Advanced Test Reactor (ATR) located at the Idaho National Engineering Laboratory.
Date:
January 1, 1993
Creator:
Atkinson, S. A.; Eide, S. A.; Khericha, S. T. & Thatcher, T. A.
Object Type:
Article
System:
The UNT Digital Library
Advanced Turbine Systems scoping and feasibility studies
The objective of the Advanced Turbine Systems (ATS) study was to investigate innovative natural gas fired cycle developments to determine the feasibility of achieving 60% (LHV) efficiency within a 10-year time frame. The potential ATS was to be environmentally superior, cost competitive and adaptable to coal-derived fuels. The National Energy Strategy (NES) calls for a balanced program of greater energy efficiency, use of alternative fuels, and the environmentally responsible development of all US energy resources> Consistent with the NES, a Department of Energy (DOE) program has been created to develop Advanced Turbine Systems. The objective of this 10-year program is to develop natural gas fired base load power plants that will have cycle efficiencies greater than 60% (LHV), be environmentally superior to current technology, and also be cost competitive.
Date:
January 1, 1993
Creator:
Bannister, R. L.; Little, D. A.; Wiant, B. C. & Archer, D. H.
Object Type:
Article
System:
The UNT Digital Library
Advanced Turbine Systems scoping and feasibility studies
The objective of the Advanced Turbine Systems (ATS) study was to investigate innovative natural gas fired cycle developments to determine the feasibility of achieving 60% (LHV) efficiency within a 10-year time frame. The potential ATS was to be environmentally superior, cost competitive and adaptable to coal-derived fuels. The National Energy Strategy (NES) calls for a balanced program of greater energy efficiency, use of alternative fuels, and the environmentally responsible development of all US energy resources> Consistent with the NES, a Department of Energy (DOE) program has been created to develop Advanced Turbine Systems. The objective of this 10-year program is to develop natural gas fired base load power plants that will have cycle efficiencies greater than 60% (LHV), be environmentally superior to current technology, and also be cost competitive.
Date:
January 1, 1993
Creator:
Bannister, R. L.; Little, D. A.; Wiant, B. C. (Westinghouse Electric Corp., Orlando, FL (United States)) & Archer, D. H. (Carnegie-Mellon Univ., Pittsburgh, PA (United States))
Object Type:
Article
System:
The UNT Digital Library
Advances in low energy neutral atom imaging techniques
Recently proposed low energy neutral atom (LENA) imaging techniques use a collisional process to convert the low energy neutrals into ions before detection. At low energies, collisional processes limit the angular resolution and conversion efficiencies of these devices. However, if the intense ultraviolet light background can be suppressed, direct LENA detection is possible. We present results from a series of experiments designed to develop a novel filtering structure based on free-standing transmission gratings. If the grating period is sufficiently small, free standing transmission gratings can be employed to substantially polarize ultraviolet (UV) light in the wavelength range 300 [Angstrom] to 1500 [Angstrom]. If a second grating is placed behind the first grating with its axis of polarization oriented at a right angle to the first's, a substantial attenuation of UV radiation is achievable. ne neutrals will pass through the remaining open area of two gratings and be detected without UV background complications. We have obtained nominal 2000 [Angstrom] period (1000 [Angstrom] bars with 1000 [Angstrom] slits) free standing, gold transmission gratings and measured their UV and atomic transmission characteristics. The geometric factor of a LENA imager based on this technology is comparable to that of other proposed LENA imagers. In …
Date:
January 1, 1993
Creator:
Scime, E. E.; Funsten, H. O.; McComas, D. J.; Moore, K.R. (Los Alamos National Lab., NM (United States)) & Gruntman, M. (University of Southern California, Los Angeles, CA (United States). Space Sciences Center)
Object Type:
Article
System:
The UNT Digital Library
Advances Related to United States and International Mineral Resources: Developing Frameworks and Exploration Technologies
The following report provides information for the public good about the origin, quality, and quantity of mineral resources world-wide. This Bulletin reports progress on some of the current activities of the Office of Mineral Resources and reflects the necessity for an international perspective regarding mineral resources and research technology.
Date:
1993
Creator:
Scott, Richard W., Jr.; Detra, Pamela S. & Berger, Byron R.
Object Type:
Report
System:
The UNT Digital Library
The AGS New Fast Extracted Beam System orbit bump pulser
The AGS New Fast Extracted Beam System (New FEB) is designed for RHIC injection and the g-2 experiment, performing single bunch multiple extraction at the prf of 20 to 100 Hz up to 12 times per AGS cycle. Capacitor-discharge pulsers are required to produce local orbit bumps at the fast kicker and ejector magnet locations. These pulsers have to deliver half-sine current pulses at 1 KA peak with a base width of 5 msec. The discharge voltage will require approximately 800V with a [plus minus]0.1% accuracy. Direct charging will require a charger too costly and difficult to build because of the high prf. An alternative charging system is being developed to take advantage of the 1.5 sec idle time between each group of pulses. The charger power supply ratings and regulation requirements are thus greatly reduced. The system analysis and results from a prototype will be presented.
Date:
January 1, 1993
Creator:
Chang, J. S. & Soukas, A. V.
Object Type:
Article
System:
The UNT Digital Library
Agua Nueva Northwest Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24000
Date:
1993
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Agua Nueva Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24000
Date:
1993
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Agua Nueva Southeast Quadrangle
Topographic map of a portion of Texas from the United States Geological Survey (USGS) project. The map includes towns, historic or notable sites, bodies of water, and other geologic features. Scale 1:24000
Date:
1993
Creator:
Geological Survey (U.S.)
Object Type:
Map
System:
The Portal to Texas History
Airblast environments from buried HE charges
Laboratory experiments were conducted to measure the airblast environment generated by the detonation of buried HE charges. Spherical 0.5-g charges of Nitropenta were used as the HE source. Three ground materials were used: (1) a porous, crushable grout (YTONG, {rho} = 0.4 g/cm{sup 3}); (2) a water-saturated grout ({rho} {approx_equal} 0.7 g/Cm{sup 3}) to investigate the effects of density increase; and (3) a clay-loam material ({rho} {approx_equal} 1.8 g/cm{sup 3}) to simulate some of the previous field tests conducted in clay. Diagnostics consisted of 13 flush-mounted pressure gauges, and single-frame schlieren photography. A special shock isolation system was used to eliminate the acceleration effects on the gauges that were induced by the cratering process. Analysis of the pressure measurements resulted in an experimental definition of the airblast environment as a function of ground range (GR) and depth-of-burst (DOB). Synthesis of these results allowed one to construct airblast DOB curves, similar to the airblast height-of-burst curves that we published previously for Nitropenta charges. Variables analyzed were: peak pressure, arrival time, positive phase duration and impulse. As in field tests, we found that the airblast waveforms changed character with increasing DOB. The crater characteristics (e.a., depth, radius and volume) were also measured. …
Date:
January 1, 1993
Creator:
Reichenbach, H.; Behrens, K. & Kuhl, A.
Object Type:
Report
System:
The UNT Digital Library
AISI Direct Steelmaking Program
Pilot plant trials with the horizontal vessel were completed. Design of a third pressurized vessel and an offgas cleaning and tempering system was completed. Installation is now underway. A basic study and a pre-engineering design of a 350,000-metric ton/y demonstration plant were completed, and efforts are underway to develop such a demonstration plant at a host steel company. Foreign filings have been prepared for the two-zone countercurrent smelter (patent applied for). Work with a water model of two-zone smelter was completed. The horizontal smelter program was completed. Trials were conducted to determine how sulfur is partitioned among the hot metal, slag, and offgas. Design of offgas cleaning and tempering loop was completed.
Date:
January 1, 1993
Creator:
Aukrust, E.
Object Type:
Report
System:
The UNT Digital Library
AISI Direct Steelmaking Program. Annual technical report, Year ending November 30, 1992
Pilot plant trials with the horizontal vessel were completed. Design of a third pressurized vessel and an offgas cleaning and tempering system was completed. Installation is now underway. A basic study and a pre-engineering design of a 350,000-metric ton/y demonstration plant were completed, and efforts are underway to develop such a demonstration plant at a host steel company. Foreign filings have been prepared for the two-zone countercurrent smelter (patent applied for). Work with a water model of two-zone smelter was completed. The horizontal smelter program was completed. Trials were conducted to determine how sulfur is partitioned among the hot metal, slag, and offgas. Design of offgas cleaning and tempering loop was completed.
Date:
January 1, 1993
Creator:
Aukrust, E.
Object Type:
Report
System:
The UNT Digital Library
Los Alamos experimental capabilities: Ancho Canyon high explosives and pulse power facilities
This document outlines the Ancho Canyon testing facility comprehensive material characterization capabilities. These include the high explosive (HE) firing sites, a full complement of gun facilities, and variety of pulse power capacitor bank systems of various energies. The explosive fabrication capability at Los Alamos allows the design and testing of unique HE experimental assemblies. Depending on the hydrodynamic requirements, these explosive systems can vary widely in cost. Years of experience have enabled the development of a comprehensive set of diagnostics to monitor these experiments.
Date:
January 1, 1993
Creator:
Morris, C.E.
Object Type:
Article
System:
The UNT Digital Library
Los Alamos National Laboratory Associate Directorate for Physics and Life Sciences Quality Program
This report discusses the following on Los Alamos National Laboratory: laboratory mission with physics and life sciences goals; physics and life sciences quality requirements and guidance documents basis; process flow-down of documentation; line-organization internal and external assessments; laboratory management issues under development; and the quality assurance management plan.
Date:
January 1, 1993
Creator:
Mignardot, H.
Object Type:
Article
System:
The UNT Digital Library