Burst mode FEL with the ETA-III induction linac (open access)

Burst mode FEL with the ETA-III induction linac

Pulses of 140 GHz microwaves have been produced at a 2 kHz rate using the ETA-III induction linac and IMP wiggler. The accelerator was run in bursts of up to 50 pulses at 6 MeV and greater than 2 kA peak current. A feedback timing control system was used to synchronize acceleration voltage pulses with the electron beam, resulting in sufficient reduction of the corkscrew and energy sweep for efficient FEL operation. Peak microwave power for short bursts was in the range 0.5--1.1 GW, which is comparable to the single-pulse peak power of 0.75--2 GW. FEL bursts of more than 25 pulses were obtained.
Date: May 13, 1993
Creator: Lasnier, C. J.; Allen, S. L. & Felker, B.
Object Type: Article
System: The UNT Digital Library
Characterization of multiphase fluid flow during air-sparged hydrocyclone flotation by x-ray CT. Twelfth quarterly report, 14 May--13 August 1993 (open access)

Characterization of multiphase fluid flow during air-sparged hydrocyclone flotation by x-ray CT. Twelfth quarterly report, 14 May--13 August 1993

During this quarter some experiments from the previous set were repeated to check the reproducibility of the results. Also, a new set of experiments was carried out to study the effects of (1) collector dosage, (2) Q* -- the nondimensional ratio of air flow rate to slurry flow rate, and (3) slurry pressure on the flow characteristics. Four different Q* values with hydrophobic particles in the feed slurry were studied. The value of A*, the dimensionless ratio of overflow opening area to underflow opening area, was maintained at the same level (A* 1.00). Quartz particles of size {sup {minus}}100 {sup +}200 mesh were used for this study rather than coal particles because they did not abrade and were of a higher density. The reagents used were 40 ppM (water basis) of MIBC frother and 800 g of dodecyl amine collector per ton of dry solids in the suspension. In other experiments with no solids in the feed suspension, collector level in the water was varied at 0, 10 and 20 ppM. At room temperature, quartz is intrinsically hydrophilic while addition of the amine collector renders the quartz particles hydrophobic. The absence of collector will be referred to as the hydrophilic …
Date: August 13, 1993
Creator: Miller, J. D.
Object Type: Report
System: The UNT Digital Library
Complex source rate estimation for atmospheric transport and dispersion models (open access)

Complex source rate estimation for atmospheric transport and dispersion models

The accuracy associated with assessing the environmental consequences of an accidental atmospheric release of radioactivity is highly dependent on our knowledge of the source release rate which is generally poorly known. This paper reports on a technique that integrates the radiological measurements with atmospheric dispersion modeling for more accurate source term estimation. We construct a minimum least squares methodology for solving the inverse problem with no a priori information about the source rate.
Date: September 13, 1993
Creator: Edwards, L. L.
Object Type: Report
System: The UNT Digital Library
Control of a catalytic fluid cracker (open access)

Control of a catalytic fluid cracker

Control offers an important tool for savings in refineries, mainly by integration of process models into on-line control. This paper is part of a research effort to better understand problems of partial control; control of a Fluid Catalytic Cracker (FCC) is used as example. Goal is to understand better the control problems of an FCC in context of model based control of a refinery, and to understand the general problem of designing partial control systems.
Date: December 13, 1993
Creator: Arbel, A.; Huang, Z.; Rinard, I. & Shinnar, R.
Object Type: Report
System: The UNT Digital Library
Demonstration of no feasibility of a Crystalline Beam in a Betatron Magnet (open access)

Demonstration of no feasibility of a Crystalline Beam in a Betatron Magnet

This technical report investigates the feasibility of a Crystalline Beam in a weak-focussing storage ring like a Betatron. At the same time the curvature effect due to the bending magnet is also investigated. As a special case, the example of a circular one-dimensional string of electrically charged particles is examined. It is found that the motion of the particles is unstable due to the dependence of the precession movement with respect to each other on their radial displacement. That is a form of negative-mass instability which can be avoided with an alternating-focussing structure corresponding to a transition energy above the energy of the particles. The calculation of the particle-particle interaction as well as of the forces due to the external magnetic field is done directly in the laboratory frame. The retarded potential expressions are used at this purpose.
Date: September 13, 1993
Creator: Ruggiero, Alessandro G.
Object Type: Report
System: The UNT Digital Library
The development of coal-based technologies for Department of Defense facilities. Semiannual technical progress report, September 28, 1992--March 27, 1993 (open access)

The development of coal-based technologies for Department of Defense facilities. Semiannual technical progress report, September 28, 1992--March 27, 1993

The US Department of Defense (DOD), through an Interagency Agreement with the US Department of Energy (DOE), has initiated a three-phase program with the Consortium for Coal-Water Slurry Fuel Technology, with the aim of decreasing DOD`s reliance on imported oil by increasing its use of coal. The program is being conducted as a cooperative agreement between the Consortium and DOE and the first phase of the program is underway. Phase I activities are focused on developing clean, coal-based combustion technologies for the utilization of both micronized coal-water mixtures (MCWMs) and dry, micronized coal (MC) in fuel oil-designed industrial boilers. Phase II research and development activities will continue to focus on industrial boiler retrofit technologies by addressing emissions control and pre-combustion (i.e., slagging combustion and/or gasification) strategies for the utilization of high ash and high sulfur coals. Phase III activities will examine coal-based fuel combustion systems that cofire wastes. Each phase includes an engineering cost analysis and technology assessment. The activities and status of Phase I are described below. The objective in Phase I is to deliver fully engineered retrofit options for a fuel oil- designed watertube boiler located on a DOD installation to fire either MCWM or MC. This will …
Date: May 13, 1993
Creator: Miller, B. G.; Scaroni, A. W. & Hogg, R.
Object Type: Report
System: The UNT Digital Library
Development of measurement capabilities for the thermophysical properties of energy-related fluids. Annual report, December 1, 1992--November 30, 1993 (open access)

Development of measurement capabilities for the thermophysical properties of energy-related fluids. Annual report, December 1, 1992--November 30, 1993

The measurement capabilities to be developed include new apparatus for transport properties, thermodynamic properties, phase equilibria, and dielectric properties. Specific capabilities are: Thermal conductivity apparatus, vibrating wire viscometer, dual-sinker densimeter, high-temperature vibrating tube densimeter, dynamic phase equilibria apparatus, apparatus for dilute solutions, total-enthalpy flow calorimeter. Benchmark measurements were made (no data given) on pure and mixed alternative refrigerants and their mixtures with lubricants, and other fluids.
Date: August 13, 1993
Creator: Kayser, R. F.
Object Type: Report
System: The UNT Digital Library
Direct Digital Phase Shift by DDS rf Source (open access)

Direct Digital Phase Shift by DDS rf Source

None
Date: April 13, 1993
Creator: A., Pei
Object Type: Report
System: The UNT Digital Library
Electric power monthly, August 1993 (open access)

Electric power monthly, August 1993

The Electric Power Monthly (EPM) presents monthly electricity statistics. The purpose of this publication is to provide energy decisionmakers with accurate and timely information that may be used in forming various perspectives on electric issues that lie ahead. The EPM is prepared by the Survey Management Division; Office of Coal, Nuclear, Electric and Alternate Fuels, Energy Information Administration (EIA), Department of Energy. This publication provides monthly statistics at the US, Census division, and State levels for net generation, fossil fuel consumption and stocks, quantity and quality of fossil fuels, cost of fossil fuels, electricity sales, revenue, and average revenue per kilowatthour of electricity sold. Data on net generation, fuel consumption, fuel stocks, quantity and cost of fossil fuels are also displayed for the North American Electric Reliability Council (NERC) regions.
Date: August 13, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Elevation of surficial sediment/basalt contact in the Subsurface Disposal Area, Idaho National Engineering Laboratory (open access)

Elevation of surficial sediment/basalt contact in the Subsurface Disposal Area, Idaho National Engineering Laboratory

The elevation of the surficial sediment/basalt contact at the Subsurface Disposal Area (SDA), within the Radioactive Waste Management Complex (RWMC) is presented to provide a data base for future remedial actions at this site. About 1,300 elevation data from published and unpublished reports, maps, and surveyors notes were compiled to generate maps and cross-sections of the surficial sediment/basalt contact. In general, an east to west trending depression exists in the south central portion of the SDA with basalt closer to land surface on the northern and southern boundaries of the SDA. The lowest elevation of the surficial sediment/basalt contact is 4,979 ft and the greatest is land surface at 5,012 ft. The median elevation of the sediment/basalt interface is 4,994 ft. The median depth to basalt in the SDA is 16 ft if land surface elevation is assumed to be 5,010 ft. The depth from land surface to the sediment/basalt interface ranges from 24 ft in the southeast corner of the SDA to less than 3 ft at the north-central boundary of the SDA.
Date: May 13, 1993
Creator: Hubbell, J. M.
Object Type: Report
System: The UNT Digital Library
Energy Policy Act transportation rate study: Availability of data and studies (open access)

Energy Policy Act transportation rate study: Availability of data and studies

Pursuant to Section 1340(c) of the Energy Policy Act of 1992 (EPACT), this report presents the Secretary of Energy`s review of data collected by the Federal Government on rates for rail and pipeline transportation of domestic coal, oil, and gas for the years 1988 through 1997, and proposals to develop an adequate data base for each of the fuels, based on the data availability review. This report also presents the Energy Information Administration`s findings regarding the extent to which any Federal agency is studying the impacts of the Clean Air Act Amendments of 1990 (CAAA90) and other Federal policies on the transportation rates and distribution patterns of domestic coal, oil, and gas.
Date: October 13, 1993
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Experience with performance based training of nuclear criticality safety engineers (open access)

Experience with performance based training of nuclear criticality safety engineers

For non-reactor nuclear facilities, the U.S. Department of Energy (DOE) does not require that nuclear criticality safety engineers demonstrate qualification for their job. It is likely, however, that more formalism will be required in the future. Current DOE requirements for those positions which do have to demonstrate qualification indicate that qualification should be achieved by using a systematic approach such as performance based training (PBT). Assuming that PBT would be an acceptable mechanism for nuclear criticality safety engineer training in a more formal environment, a site-specific analysis of the nuclear criticality safety engineer job was performed. Based on this analysis, classes are being developed and delivered to a target audience of newer nuclear criticality safety engineers. Because current interest is in developing training for selected aspects of the nuclear criticality safety engineer job, the analysis is incompletely developed in some areas.
Date: July 13, 1993
Creator: Taylor, R. G.
Object Type: Article
System: The UNT Digital Library
Exploring phase space concepts in the forecasting of time series with artificial neural networks (open access)

Exploring phase space concepts in the forecasting of time series with artificial neural networks

The authors study the performance of feedforward artificial neural networks in forecasting future values of several different time series. They explore both short- and long-term prediction of several periodic time series. They find that a significant source of error in long-term prediction of time series is introduced by a phase shift between the network output and the time series. They explore the origin of this phase shift and suggest strategies for minimizing its effect. They find that the phase diagrams of the time series and the neural network forecast contain useful diagnostic information.
Date: September 13, 1993
Creator: Rogers, R. D. & Vemuri, V.
Object Type: Article
System: The UNT Digital Library
Fiber optic chemical sensors for characterizing the carbon cycle in ocean margin regions (open access)

Fiber optic chemical sensors for characterizing the carbon cycle in ocean margin regions

The overall objective of our DOE-Ocean Margins Programs grant is to develop a pCO[sub 2] sensor for long-term monitoring of pCO[sub 2] in the ocean margins and to establish a proving ground for the development of other chemical sensors for characterizing the carbon cycle in these regions. We have succeeded in keeping with the approximate timeline outlined in the original proposal, which, for year 1 included the following objectives: Continue sensor optimization, test response characteristics (reagent and sample flow rates, temperature), introduce position sensitive photodiode and photodiode array spectrophotometers and evaluate, develop reliable and reproducible fabrication techniques, develop sensor based on preliminary studies optimized for field measurements (minimize size and power requirements), test long-term stability of the sensor in the laboratory, determine susceptibility to fouling and corrosion. This work is summarized below along with a brief review of the sensor's operating principle.
Date: April 13, 1993
Creator: DeGrandpre, Michael D. & Sayles, Frederick L.
Object Type: Report
System: The UNT Digital Library
Fiber optic chemical sensors for characterizing the carbon cycle in ocean margin regions. Annual progress report (open access)

Fiber optic chemical sensors for characterizing the carbon cycle in ocean margin regions. Annual progress report

The overall objective of our DOE-Ocean Margins Programs grant is to develop a pCO{sub 2} sensor for long-term monitoring of pCO{sub 2} in the ocean margins and to establish a proving ground for the development of other chemical sensors for characterizing the carbon cycle in these regions. We have succeeded in keeping with the approximate timeline outlined in the original proposal, which, for year 1 included the following objectives: Continue sensor optimization, test response characteristics (reagent and sample flow rates, temperature), introduce position sensitive photodiode and photodiode array spectrophotometers and evaluate, develop reliable and reproducible fabrication techniques, develop sensor based on preliminary studies optimized for field measurements (minimize size and power requirements), test long-term stability of the sensor in the laboratory, determine susceptibility to fouling and corrosion. This work is summarized below along with a brief review of the sensor`s operating principle.
Date: April 13, 1993
Creator: DeGrandpre, M. D. & Sayles, F. L.
Object Type: Report
System: The UNT Digital Library
Final results from the SDC dopant search for new green wavelength shifting (WLS) fibers. Volume 2 (open access)

Final results from the SDC dopant search for new green wavelength shifting (WLS) fibers. Volume 2

This report contains fluorescent spectral graphs of dopant materials for green wavelength shifting fibers.
Date: December 13, 1993
Creator: Pla-Dalmau, A.; Foster, G. W. & Zhang, G.
Object Type: Report
System: The UNT Digital Library
Flue gas conditioning for improved particle collection in electrostatic precipitators. Second topical report, Results of bench-scale screening of additives (open access)

Flue gas conditioning for improved particle collection in electrostatic precipitators. Second topical report, Results of bench-scale screening of additives

ADA Technologies, Inc. (ADA) has completed the bench-scale testing phase of a program to evaluate additives that will improve the collection of fine particles in electrostatic precipitators (ESPs). A bench-scale ESP was installed at the Consolidation Coal Company (CONSOL) combustion research and development facility in Library, PA in order to conduct the evaluation. During a two-week test, four candidate additives were injected into the flue gas ahead of a 100 acfm ESP to determine the effect on fly ash collectability. Two additives were found to reduce the emissions from the ESP. Additives ``C`` and ``D`` performed better than initially anticipated -- reducing emissions initially by 17%. Emissions were reduced by 27% after the ESP was modified by the installation of baffles to minimize sneakage. In addition to the measured improvements in performance, no detrimental effects (i.e., electrode fouling) were observed in the operation of the ESP during the testing. The measures of success identified for the bench-scale phase of the program have been surpassed. Since the additives will affect only non-rapping reentrainment particle losses, it is expected that an even greater improvement in particle collection will be observed in larger-scale ESPs. Therefore, positive results are anticipated during the pilot-scale phase …
Date: August 13, 1993
Creator: Durham, M. D.
Object Type: Report
System: The UNT Digital Library
Fundamental mechanisms in flue gas conditioning. Quarterly report, April 1993--June 1993 (open access)

Fundamental mechanisms in flue gas conditioning. Quarterly report, April 1993--June 1993

The experiments we have been performing are primarily designed to define the extent to which water affects key properties of ashes, powders, and mixtures of sorbents and ashes. We have included selected data from prior quarterly reports in this report for the sake of completeness, and for comparisons with newly-acquired data. In several places in this report samples are referred to by their identification (SID) numbers. Table I provides a brief description of all the samples we have used in this project along with their SID numbers. As suggested by our literature review, our data indicate that water adsorption depends on particle morphology and surface chemistry. Our recent laboratory efforts were primarily directed toward the determination of the effects of adsorbed water on the tensile and cohesive strengths of powders, the development of apparatus for SO{sub 3} and organosiloxane conditioning, and the conditioning of powders and ashes with organosiloxane.
Date: July 13, 1993
Creator: Snyder, T. R.
Object Type: Report
System: The UNT Digital Library
Genetic algorithms for DNA sequence assembly (open access)

Genetic algorithms for DNA sequence assembly

This paper describes a genetic algorithm application to the DNA fragment assembly problems. The genetic algorithm uses a random key representation for representing the orderings of fragments. Two different fitness functions, both based on pairwise overlap strengths between fragments, were tested. The paper concludes that the genetic algorithm is a promising method for fragment assembly problems, achieving usable solutions quickly, but that the current fitness functions are flawed and that other representations might be more appropriate.
Date: April 13, 1993
Creator: Parsons, R.; Burks, C. (Los Alamos National Lab., NM (United States)) & Forrest, S. (New Mexico Univ., Albuquerque, NM (United States). Dept. of Computer Science)
Object Type: Article
System: The UNT Digital Library
Genetic algorithms for DNA sequence assembly (open access)

Genetic algorithms for DNA sequence assembly

This paper describes a genetic algorithm application to the DNA fragment assembly problems. The genetic algorithm uses a random key representation for representing the orderings of fragments. Two different fitness functions, both based on pairwise overlap strengths between fragments, were tested. The paper concludes that the genetic algorithm is a promising method for fragment assembly problems, achieving usable solutions quickly, but that the current fitness functions are flawed and that other representations might be more appropriate.
Date: April 13, 1993
Creator: Parsons, R.; Burks, C. & Forrest, S.
Object Type: Article
System: The UNT Digital Library
Groundwater monitoring plan for the proposed state-approved land disposal structure (open access)

Groundwater monitoring plan for the proposed state-approved land disposal structure

This document outlines a detection-level groundwater monitoring program for the state-approved land disposal structure (SALDS). The SALDS is an infiltration basin proposed for disposal of treated effluent from the 200 Areas of the Hanford Site. The purpose of this plan is to present a groundwater monitoring program that is capable of determining the impact of effluent disposal at the SALDS on the quality of groundwater in the uppermost aquifer. This groundwater monitoring plan presents an overview of the SALDS, the geology and hydrology of the area, the background and indicator evaluation (detection) groundwater monitoring program, and an outline of a groundwater quality assessment (compliance) program. This plan does not provide a plan for institutional controls to track tritium beyond the SALDS.
Date: October 13, 1993
Creator: Reidel, S. P.
Object Type: Report
System: The UNT Digital Library
Guide to the CIAC-2300 series documents (open access)

Guide to the CIAC-2300 series documents

The Computer Incident Advisory Capability (CIAC) creates public information documents for the Dept. of Energy (DOE) related to computer security. These documents, known as the CIAC-2300 Series documents, are primarily concerned with information on security threats and methods for protecting systems from those threats. This document is a compilation of the abstracts of these documents.
Date: December 13, 1993
Creator: Orvis, William J.
Object Type: Report
System: The UNT Digital Library
High Luminosity p-p Operation at RHIC (open access)

High Luminosity p-p Operation at RHIC

None
Date: August 13, 1993
Creator: Harrison, M. A.
Object Type: Report
System: The UNT Digital Library
Identification and characterization of conservative organic tracers for use as hydrologic tracers for the Yucca Mountain site characterization project: Quality Assurance Project Plan, Revision 1; Quarterly progress report, October 1, 1993--December 31, 1993 (open access)

Identification and characterization of conservative organic tracers for use as hydrologic tracers for the Yucca Mountain site characterization project: Quality Assurance Project Plan, Revision 1; Quarterly progress report, October 1, 1993--December 31, 1993

The purpose of this work is to identify and characterize candidate conservative organic tracers for use as hydrologic tracers for experiments to be conducted at the Yucca Mountain C-well complex. During this quarter the main effort was directed towards rewriting the quality assurance program in preparation for a review and audit by the USGS. However, due to budget constraints the review and audit were not carried out. The tracer QA plan and standard operating procedures (SOPs) were revised and copies are included in the report. Instrumental problems were encountered and corrected with the addition of new integration and sample control software. In the sampling, there was an unexplained peak in the chromatograms of the tracers being tested in the light tuff. This was not correctable and these experiments will be repeated in the next quarter.
Date: December 13, 1993
Creator: Stetzenbach, Klaus J.
Object Type: Report
System: The UNT Digital Library