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Jefferson Lab Personnel Safety Fast Beam Kicker System

Description: The CEBAF accelerator at Thomas Jefferson National Accelerator Facility (Jefferson Lab) uses a continuous electron beam with up to 800 kilowatts of average beam power. The laboratory beam containment policy requires that in the event of an errant beam striking a beam blocking device, the beam must be shut off by three methods in less than 1 millisecond. One method implemented is to shut off the beam at the gun. Two additional methods have been developed which use fast beam kickers to deflect th… more
Date: August 1, 1997
Creator: Mahoney, K.; Garza, O.; Stitts, E.; Areti, H. & O`Sullivan, M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Automated Path Length and M{Sub 56} Measurements at Jefferson Lab

Description: Accurate measurement of path length and path length changes versus momentum (M{sub 56}) are critical for maintaining minimum beam energy spread in the CEBAF (Continuous Electron Beam Accelerator Facility) accelerator at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). The relative path length for each circuit of the beam (1256m) must be equal within 1.5 degrees of 1497 MHz RF phase. A relative path length measurement is made by measuring the relative phases of RF signals from… more
Date: August 1, 1997
Creator: Hardy, D.; Tang, J. & Legg, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Home Energy Rating System Building Energy Simulation Test for Florida (Florida-HERS BESTEST): Tier 1 and Tier 2 Tests; Vol. 1 (User's Manual) and Vol. 2 (Reference Results)

Description: In 1991, the U.S. Department of Energy, in cooperation with the Department of Housing and Urban Development (HUD), initiated a collaborative process to define a residential energy efficiency rating program linked with energy-efficient mortgage (EEM) financing. During this process, the collaborative, consisting of a broad-based group representing stakeholder organizations, identified the need for quality control procedures to evaluate and verify the energy prediction methods used by Home Energy … more
Date: August 1, 1997
Creator: Judkoff, R. & Neymark, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modular Reliability Modeling of the TJNAF Personnel Safety System

Description: A reliability model for the Thomas Jefferson National Accelerator Facility (formerly CEBAF) personnel safety system has been developed. The model, which was implemented using an Excel spreadsheet, allows simulation of all or parts of the system. Modularity os the model`s implementation allows rapid {open_quotes}what if{open_quotes} case studies to simulate change in safety system parameters such as redundancy, diversity, and failure rates. Particular emphasis is given to the prediction of failu… more
Date: August 1, 1997
Creator: Cinnamon, J. & Mahoney, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Methods of Orbit Correction System Optimization

Description: Extracting optimal performance out of an orbit correction system is an important component of accelerator design and evaluation. The question of effectiveness vs. economy, however, is not always easily tractable. This is especially true in cases where betatron function magnitude and phase advance do not have smooth or periodic dependencies on the physical distance. In this report a program is presented using linear algebraic techniques to address this problem. A systematic recipe is given, supp… more
Date: August 1, 1997
Creator: Chao, Yu-Chiu
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Emerging Standards With Application to Accelerator Safety Systems

Description: This paper addresses international standards which can be applied to the requirements for accelerator personnel safety systems. Particular emphasis is given to standards which specify requirements for safety interlock systems which employ programmable electronic subsystems. The work draws on methodologies currently under development for the medical, process control, and nuclear industries.
Date: August 1, 1997
Creator: Mahoney, K. L. & Robertson, H. P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Pulse Selection Control for the IR FEL Photocathode Drive Laser

Description: The method for current control of a photocathode source is described. This system allows for full remote control of a photocathode drive laser for resulting electron beam currents ranging from less than one microamp to a full current ranging from less than one microamp to a full current of five milliamps. All current modes are obtained by gating the drive laser with a series of electro-optical cells. The system remotely generates this control signal by assuming a mode of operation with the foll… more
Date: August 1, 1997
Creator: Jordan, K.; Evans, R. & Garza, O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

NREL Photovoltaic Program FY 1996 Annual Report

Description: This report summarizes the in-house and subcontract research and development (R&D) activities under the National Renewable Energy Laboratory (NREL) Photovoltaics (PV) Program from October 1, 1995 through September 30, 1996 (fiscal year [FY] 1996). The NREL PV Program is part of the U.S. Department of Energy's (DOE) National Photovoltaics Program, as described in the DOE Photovoltaics Program Plan, FY 1991 - FY 1995. The mission of the DOE National Photovoltaics Program is to: "Work in partnersh… more
Date: August 1, 1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Gomez FOLO]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 10:00 P.M.
Date: August 1, 1997
Duration: 2 minutes
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: Housing Pkg]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 6:00 P.M.
Date: August 1, 1997
Duration: 2 minutes 05 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
captions transcript

[News Clip: UPS Strike]

Description: Video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story. This story aired at 5:00 P.M.
Date: August 1, 1997
Duration: 44 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Comparison of Laboratory and Field Methods for Determining the Quasi-Saturated Hydraulic Conductivity of Soils

Description: Laboratory and field ponded infiltration tests in quasi-saturated soils (containing entrapped air) exhibit the same three-stage temporal variability for the flow rate and hydraulic conductivity. However, the values for the hydraulic conductivity may differ by as much as two orders of magnitude due to differences in the geometry and physics of flow when different laboratory and field methods are applied. The purpose of this paper is to investigate this variability using a comparison of results o… more
Date: August 1, 1997
Creator: Faybishenko, Boris
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Strong Decays of Hybrid Mesons from the Heavy Quark Expansion of QCD

Description: We calculate the strong decays of hybrid mesons to conventional mesons for all the lowest lying J{sup PC} hybrids of flavour u{bar u}, d{bar d}, s{bar s}, c{bar c} and b{bar b}. A decay operator developed from the heavy quark expansion of quantum chromodynamics is employed. We show that the selection rule that hybrid mesons do not decay to identical S-wave mesons, found in other models, is preserved. We predict decays of charmonium hybrids, discuss decays of J{sup PC} = 1{sup -+} exotic isovect… more
Date: August 1, 1997
Creator: Page, Philip R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Safer Work Plan for CAUs 452, 454, 456, and 464 Closure of Historical UST Release Sites Nevada Test Site

Description: This plan addresses characterization and closure of nine underground storage tank petroleum hydrocarbon release sites. The sites are located at the Nevada Test Site in Areas 2, 9, 12, 23, and 25. The underground storage tanks associated with the release sites and addressed by this plan were closed between 1990 and 1996 by the U. S. Department of Energy, Nevada Operations Office. One underground storage tank was closed in place (23-111-1) while the remaining eight were closed by removal. Hydroca… more
Date: August 1, 1997
Creator: Bonn, Jerry
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A compton backscattering polarimeter for measuring longitudinal electron polarization

Description: Compton backscattering polarimetry provides a fast measurement of the polarization of an electron beam in a storage ring. Since the method is non-destructive, the polarization of the electrons can be monitored during internal target experiments. At NIKHEF a Compton polarimeter has been constructed to measure the polarization of the longitudinally polarized electrons stored in the AmPS ring. First results obtained with the polarimeter, the first Compton polarimeter to measure the polarization of… more
Date: August 1, 1997
Creator: Passchier, I.; Higinbotham, Douglas W.; Vodinas, N.; Papadakis, N.; Jager, Kees de; Alarcon, Ricardo et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Large experiment data analysis collaboration. Annual progress report for period November 15, 1996 - November 14, 1997

Description: This is the second annual progress on the three-year Large Experiment Data Analysis Collaboration DOE grant DE-FGO2-92ER54139, which succeeded a previous four-year grant under the same grant number. This year most of the collaboration effort shifted from being with the TFTR program, to being with the DIII-D program, and most new research focused on the properties, causes and possible amelioration of neoclassical tearing modes. In addition, our studies of nonlocal electron heat transport in TFTR… more
Date: August 1, 1997
Creator: Callen, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Task 2.8 - Mercury Speciation and Capture in Scubber Solutions

Description: U.S. Environmental Protection Agency (EPA) investigation into health risks associated with mercury emissions from utility steam generators, municipal waste combustion units, and other sources was mandated by the Clean Air Act Amendments (CAAA) of 1990. In anticipation of mercury emission regulation, attention has been focused on quantification of mercury emissions, which require verifiable sampling and analytical techniques. Several sampling and analytical methods are currently under the final … more
Date: August 1, 1997
Creator: Ness, Sumitra R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Design and Implementation of a C02 Flood Utilizing Advanced Reservoir Characterization and Horizontal Injection Wells in a Shallow Shelf Carbonate Approaching Waterflood Depletion

Description: The objective is to utilize reservoir characteristics and advanced technologies to optimize the design of a carbon dioxide (CO2) project for the South Cowden Unit (SCU) located in Ector County, Texas. The SCU is a mature, relatively small, shallow shelf carbonate unit nearing waterflood depletion. Also the project seeks to demonstrate the performance and economic viability of the project in the field.
Date: August 1, 1997
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Use of in-process EDM truing to generate complex contours on metal-bond, superabrasive grinding wheels for precision grinding structural ceramics

Description: This paper presents recent work performed at Lawrence Livermore National Laboratory to develop cost-effective, versatile and robust manufacturing methods for grinding precision features in structural ceramics using metal-bond, superabrasive grinding wheels. The developed processes include utilizing specialized, on-machine hardware to generate precision profiles onto grinding wheels using electrical-discharge machining (EDM) and a contoured rotating electrode. The production grinding processes a… more
Date: August 1, 1997
Creator: Piscotty, M. A., LLNL
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Subtask 1.17 - Subcritical Water Extraction of Mercury From Soils and Sediments

Description: The U.S. Environmental Protection Agency (EPA) "National Sediment Quality Survey" lists the top pollutants responsible for toxicity in watersheds as 1) PCBS (polychlorinated biphenyls), 2) mercury, and 3) other organics such as PAHs polycyclic aromatic hydrocarbons) and pesticides. In addition, these same pollutants are major contributors to chemical pollution on U.S. Department of Energy (DOE) and other contaminated sites (e.g., industrial sites and harbors). An ideal remediation method would … more
Date: August 1, 1997
Creator: Hawthorne, Steven B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Incorporation of Technetium Into a Representative Low-Activity Waste Glass

Description: A glass that has been tested to understand the corrosion behavior of waste glasses with high soda contents for immobilizing Hanford incidental wastes has been made by melting crushed glass with either TcO{sub 2} or NaTcO{sub 4} at 1,100--1,300 C. Incorporation of technetium in the glass was affected by solubility or kinetic effects. Metallic technetium inclusions formed in all the TcO{sub 2}-doped glasses. Inclusions also formed in glasses with added NaTcO{sub 4} that were melted at 1,100 C, bu… more
Date: August 1, 1997
Creator: Ebert, W. L.; Bakel, A. J.; Bowers, D. L.; Buck, E. C. & Emery, J. W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Gas Evolution During Vitrification of Sodium Sulfate and Silica

Description: This paper describes the operation of an apparatus designed to identify species evolved during vitrification of hazardous waste materials and to measure the temperatures at which they are evolved. To demonstrate the utility of the apparatus for designing off-gas systems, the authors present the results of heating various sulfates alone and in the presence of silica. During vitrification, the decomposition behavior of some waste components will be affected by the chemical composition of the melt… more
Date: August 1, 1997
Creator: Ebert, W. L.; Bakel, A. J. & Rosine, S. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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