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1 nA beam position monitoring system

Description: A system has been developed at Jefferson Lab for measuring transverse position of very low current beams delivered to the Experimental Hall B of the Continuous Electron Beam Accelerator Facility (CEBAF). At the heart of the system is a position sensitive cavity operating at 1497 MHz. The cavity utilizes a unique design which achieves a high sensitivity to beam position at a relatively low cavity Q. The cavity output RF signal is processed using a down-converter and a commercial lock-in amplifie… more
Date: June 1, 1997
Creator: Ursic, R.; Flood, R. & Piller, C.
Item Type: Refine your search to only Article
open access

A 1- to 5-MW, RCS-based, short-pulse spallation neutron source

Description: Two accelerator configurations, the linac/compressor ring scheme and the linac/RCS scheme, are commonly used to provide the proton beam power for a short-pulse spallation neutron source. In one configuration, a full-power linac provides the beam power and a compressor ring shortens the pulse length from 1-ms down to 1 {micro}s. In the other, rapid cycling synchrotrons (RCSs) provide the beam power and also shorten the pulse length. A feasibility study of a staged approach to a 5-MW proton sourc… more
Date: June 1997
Creator: Cho, Y.; Chae, Y.-C. & Crosbie, E.
Item Type: Refine your search to only Article
open access

3-D Spectral Induced Polarization (IP) Imaging: Non-Invasive Characterization Of Contaminant Plumes

Description: The overall objective of this project is to develop the scientific basis for characterizing contaminant plumes in the earth's subsurface using field measurements of induced polarization (IP) effects. Three specific objectives towards this end are 1. 2. 3. Understanding IP at the laboratory level through measurements of complex resistivity as a function of frequency in rock and soil samples with varying pore geometries, pore fluid conductivities and saturations, and contaminant chemistries and c… more
Date: June 1, 1997
Creator: Morgan, Dale F.; Lesmes, David P.; Rodi, William; Shi, Weiqun; Frye, Kevin, M. & Sturrock, John
Item Type: Refine your search to only Report
open access

5. annual clean coal technology conference: powering the next millennium. Volume 2

Description: The Fifth Annual Clean Coal Technology Conference focuses on presenting strategies and approaches that will enable clean coal technologies to resolve the competing, interrelated demands for power, economic viability, and environmental constraints associated with the use of coal in the post-2000 era. The program addresses the dynamic changes that will result from utility competition and industry restructuring, and to the evolution of markets abroad. Current projections for electricity highlight … more
Date: June 1, 1997
Item Type: Refine your search to only Article
open access

10 microsecond time resolution studies of Cygnus X-1

Description: Time variability analyses have been applied to data composed of event times of X-rays emitted from the binary system Cygnus X-1 to search for unique black hole signatures. The X-ray data analyzed was collected at ten microsecond time resolution or better from two instruments, the High Energy Astrophysical Observatory (HEAO) A-1 detector and the Rossi X-ray Timing Explorer (XTE) Proportional Counter Array (PCA). HEAO A-1 and RXTE/PCA collected data from 1977--79 and from 1996 on with energy sens… more
Date: June 1, 1997
Creator: Wen, H.C.
Item Type: Refine your search to only Thesis or Dissertation
open access

1996 Idaho National Engineering and Environmental Laboratory (INEEL) National Emissions Standards for Hazardous Air Pollutants (NESHAPs) -- Radionuclides. Annual report

Description: Under Section 61.94 of Title 40, Code of Federal Regulations (CFR), Part 61, Subpart H, ``National Emission Standards for Emissions of Radionuclides Other Than Radon From Department of Energy Facilities,`` each Department of Energy (DOE) facility must submit an annual report documenting compliance. This report addresses the Section 61.94 reporting requirements for operations at the Idaho National Engineering and Environmental Laboratory (INEEL) for calendar year (CY) 1996. The Idaho Operations … more
Date: June 1997
Item Type: Refine your search to only Report
open access

1996 Site environmental report

Description: The FEMP is a Department of Energy (DOE)-owned facility that produced high-quality uranium metals for military defense for nearly 40 years. DOE suspended production at the FEMP in 1989 and formally ended production in 1991. Although production activities have ceased, the site continues to examine the air and liquid pathways as possible routes through which pollutants from past operations and current remedial activities may leave the FEMP. The Site Environmental Report (SER) is prepared annually… more
Date: June 1, 1997
Item Type: Refine your search to only Report
open access

3D Electromagnetic inversion using conjugate gradients

Description: In large scale 3D EM inverse problems it may not be possible to directly invert a full least-squares system matrix involving model sensitivity elements. Thus iterative methods must be employed. For the inverse problem, we favor either a linear or non-linear (NL) CG scheme, depending on the application. In a NL CG scheme, the gradient of the objective function is required at each relaxation step along with a univariate line search needed to determine the optimum model update. Solution examples b… more
Date: June 1, 1997
Creator: Newman, G.A. & Alumbaugh, D.L.
Item Type: Refine your search to only Article
open access

3D electromagnetic modeling using staggered finite differences

Description: The method of finite differences has been employed to solve a variety of 3D electromagnetic (EM) forward problems arising in geophysical applications. Specific sources considered include dipolar and magnetotelluric (MT) field excitation in the frequency domain. In the forward problem, the EM fields are simulated using a vector Helmholtz equation for the electric field, which are approximated using finite differences on a staggered grid. To obtain the fields, a complex-symmetric matrix system of… more
Date: June 1, 1997
Creator: Newman, G.A. & Alumbaugh, D.L.
Item Type: Refine your search to only Article
open access

ABCC/RERF: Commemorating the First 50 Years and Looking to the Future [Symposium program]

Description: In 1946, President Harry Truman, in a document currently on display at the entrance to this auditorium, approved a directive to the National Academy of Sciences-National Research Council (NAS-NRC) to initiate a long-term investigation of the health effects associated with exposure to radiation from the atomic bombs. With funding provided by the Atomic Energy Commission, now the Department of Energy, NAS-NRC established the Atomic Bomb Casualty Commission (ABCC) in March 1947. The government of … more
Date: June 13, 1997
Item Type: Refine your search to only Article
open access

Absolute equation of state measurements of shocked liquid deuterium up to 200 GPa (2 Mbar)

Description: We present results of the first measurements of density, shock speed and particle speed in compressed liquid deuterium at pressures in excess in 1 Mbar. We have performed equation of state (EOS) measurements on the principal Hugoniot of liquid deuterium from 0.2 to 2 Mbar. We employ high-resolution radiography to simultaneously measure the compression of the sample. We are also attempting to measure the color temperature of the shocked D2. Key to this effort is the development and implementatio… more
Date: June 10, 1997
Creator: Budil, K. S.; Da Silva, L. B. & Celliers, P.
Item Type: Refine your search to only Article
open access

Acccelerator Physics Issues of a Very Large Hadron Collider

Description: A Very Large Hadron Collider (VLHC) was proposed for the post-LHC future. This paper gives a quick survey of a number of accelerator physics issues based on the information obtained from a parameter spreadsheet SSP. The main technical challenges to build such a machine appear to be: the large number of events per crossing (in hundreds), enormous beam stored energy (equivalent to tens tons of TNT), ground motion (which is particularly harmful when the synchrotron frequency is in the sub-Hertz ra… more
Date: June 1, 1997
Creator: Chou, W.
Item Type: Refine your search to only Article
open access

Accelerating Cleanup: Focus on 2006. Discussion draft

Description: This executive summary addresses the activities associated with the National Transuranic (TRU) Program managed by the Carlsbad Area Office (CAO). The CAO programmatically reports to the Assistant Secretary for Environmental Management and receives administrative support through the Albuquerque Operations Office. The mission of the Carlsbad Area Office (CAO) is to protect human health and the environment by opening and operating the Waste Isolation Pilot Plant for site disposal of TRU waste and … more
Date: June 1, 1997
Item Type: Refine your search to only Report
open access

Accident consequence calculations for project W-058 safetyanalysis

Description: Accident consequence analyses have been performed for Project W-058, the Replacement Cross Site Transfer System. using the assumption and analysis techniques developed for the Tank Remediation Waste system Basis for Interim Operation. most potential accident involving the FISTS are bounded by the TWRS BIO analysis. However, the spray leak and pool leak scenarios require revised analyses since the RCSTS design utilizes larger diameter pipe and higher pressures than those analyzed in the TWRS BIO… more
Date: June 10, 1997
Creator: Van Keuren, J.C.
Item Type: Refine your search to only Report
open access

Adhesion assessment of copper thin films

Description: Nano-indentation testing has been used to quantitatively assess the adhesion of thin copper films, sputtered to thicknesses of 150 nm to 1500 nm. Copper films of low residual stress were deposited via RF diode cathode sputtering onto SiO{sub 2}/Si substrates. Overlayers of DC magnetron sputtered tungsten, 850 nm thick with high residual stress, were additionally used to provide a driving force for delamination. All films tested exhibited buckle-driven delamination, from which the interfacial to… more
Date: June 1, 1997
Creator: Kriese, M. D.; Gerberich, W. W. & Moody, N. R.
Item Type: Refine your search to only Article
open access

Advance concepts for the conversion of syngas to liquids. Quarterly report No. 8, October 1, 1996--December 31, 1996

Description: Large pore Metal Substituted Aluminophosphate Molecular sieves, (H-MAPO-5, H-MnAPO-5, H-CoAPO-5 and H-MAPO-36) were evaluated for the conversion of ethanol in a continuous flow fixed microreactor. At 400{degrees}C, high conversion levels were observed. Ethylene and diethyl ether were the two major products obtained however the catalysts were more selective for ethylene under the reaction conditions. At 500{degrees}C ethylene was the only product detected. The low concentration of acid sites com… more
Date: June 1, 1997
Creator: Szostak, R. & Ingram, C.
Item Type: Refine your search to only Report
open access

Advanced Byproduct Recovery: Direct Catalytic Reduction of Sulfur Dioxide to Elemental Sulfur.

Description: More than 170 wet scrubber systems applied, to 72,000 MW of U.S., coal-fired, utility boilers are in operation or under construction. In these systems, the sulfur dioxide removed from the boiler flue gas is permanently bound to a sorbent material, such as lime or limestone. The sulfated sorbent must be disposed of as a waste product or, in some cases, sold as a byproduct (e.g. gypsum). Due to the abundance and low cost of naturally occurring gypsum, and the costs associated with producing an in… more
Date: June 1, 1997
Item Type: Refine your search to only Report
open access

Advanced coal liquefaction. Final quarterly report, April 1, 1996--June 30, 1996

Description: Molecular level liquid phase separations were explored using modified microporous ceramic membrane with pore size reduced from 40{Angstrom} via chemical vapor deposition. At room temperature, membranes with pore sizes <30{Angstrom} were sufficient to achieve >97% rejection of Naphthyl-bibenzyl-methane (NBBM) from toluene, which was primarily attributed to size exclusion due to hindered diffusion. The rejection diminishes dramatically as the temperature is increased. At 400{degrees}C, very small… more
Date: June 1, 1997
Item Type: Refine your search to only Report
open access

Advanced coal liquefaction. Final quarterly report, January 1, 1996--March 31, 1996

Description: Coal liquid upgrading using compound No. 9, 4-(1-naphthymethyl) bibenzyl, as a model was performed in a catalytic membrane reactor in this quarter. Membrane packed with granular catalyst synthesized from Si-CVD coatedy-Al{sub 2}O{sub 3} was used as a reactor. A control was also performed using the same reactor under a packed-bed operation mode. About 52% conversion of compound No. 9 was obtained in a packed-bed at 400{degrees}C and 200 psi. Under a similar operating condition, compound No. 9 wa… more
Date: June 1, 1997
Item Type: Refine your search to only Report
open access

Advanced lithography for nanofabrication

Description: A novel method for generating lateral features by patterning the naturally forming surface hydride layer on Si is described. Because of the relatively strong chemical bonding between silicon and hydrogen, the hydride layer acts as a robust passivation layer with essentially zero surface mobility at ordinary temperatures. A focused electron beam from a scanning electron microscope was used for patterning. Upon losing the hydrogen passivation the silicon surface sites become highly reactive. Idea… more
Date: June 1, 1997
Creator: Hui, F. & Eres, G.
Item Type: Refine your search to only Article
open access

Advanced polymer PV system: PVMaT 4A1 annual report, September 1995--September 1996

Description: Purpose of this subcontract was to produce lower module and systems costs through the innovative use of polymeric materials. The Innovative Mounting System (IMS) was developed and testing begun during the first year of this contract. IMS reduces the cost of installed PV systems by reducing labor and materials costs both in the factory and in field installation. It incorporates several advances in polymers, processing methods and product design. An advanced backskin material permits elimination … more
Date: June 1, 1997
Creator: Hanoka, J.; Chleboski, R.; Farber, M.; Fava, J.; Kane, P. & Martz, J.
Item Type: Refine your search to only Report
open access

Advanced Sulfur Control Concepts for Hot-Gas Desulfurization Technology. Quarterly Progress Report, October 1--December 31, 1996

Description: Good progress was made on both the experimental and process modelling fronts during the past quarter. All experimental tests used the fixed-bed laboratory reactor to study the sulfidation of CeO{sub 2} with H{sub 2}S and the regeneration of Ce{sub 2}O{sub 2}S using SO{sub 2}. A number of experimental problems were solved (or at least alleviated) during the quarter including malfunctioning mass flow controllers, excessive bed pressure drop, and elimination of the H{sub 2}S plateau during early s… more
Date: June 1, 1997
Item Type: Refine your search to only Report
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