5.2 mW Single-Mode Power from a Coupled-Resonator Vertical-Cavity Laser (open access)

5.2 mW Single-Mode Power from a Coupled-Resonator Vertical-Cavity Laser

None
Date: November 28, 2000
Creator: Fischer, A. J.; Choquette, K. D.; Chow, W. W.; Allerman, A. A. & Geib, K. M.
Object Type: Article
System: The UNT Digital Library
Biofuels News: Fall 2000; Volume 3, Number 2 (open access)

Biofuels News: Fall 2000; Volume 3, Number 2

Newsletter for DOE Biofuels Program. Articles on recent DOE grants and contracts under Bioenergy Initiative and related programs; also on creation of National Bioenergy Center at NREL.
Date: November 28, 2000
Creator: Brown, H.
Object Type: Book
System: The UNT Digital Library
Bull Trout (Salvelinus Confluentus) Population and Habitat Surveys in the McKenzie and Middle Fork Willamette Basins, 2000 Annual Report. (open access)

Bull Trout (Salvelinus Confluentus) Population and Habitat Surveys in the McKenzie and Middle Fork Willamette Basins, 2000 Annual Report.

Prior to 1978, Dolly Varden Salvelinus malma were classified into an anadromous and interior form. Cavender (1978) classified the interior form as a distinct species, Salvelinus confluentus, the bull trout. Bull trout are large char weighing up to 18 kg and growing to over one meter in length (Goetz 1989). They are distinguished by a broad flat head, large downward curving maxillaries that extend beyond the eye, a well developed fleshy knob and a notch in the lower terminus of the snout, and light colored spots normally smaller than the pupil of the eye (Cavender 1978). Bull trout are found throughout northwestern North America from lat. 41{sup o}N to lat. 60{sup o}N. In Oregon, bull trout were once distributed throughout 12 basins in the Klamath and Columbia River systems including the Clackamas, Santiam, McKenzie and Middle Fork Willamette sub-basins west of the Cascades (Buchanan et al. 1997). However, it is believed bull trout have been extirpated from west of the Cascades with the exception of the McKenzie sub-basin. Before 1963, bull trout in the McKenzie sub-basin were a contiguous population from the mouth to Tamolitch Falls. Following the construction of Cougar and Trail Bridge Reservoirs there are three isolated populations: …
Date: November 28, 2000
Creator: Taylor, Greg
Object Type: Report
System: The UNT Digital Library
Charge-Separation Effects in 1.3{micro}m GaAsSb Type II Quantum well Laser Gain (open access)

Charge-Separation Effects in 1.3{micro}m GaAsSb Type II Quantum well Laser Gain

None
Date: November 28, 2000
Creator: Chow, W. W. & Schneider, H. C.
Object Type: Article
System: The UNT Digital Library
Collaborative Evaluation of Early Design Decisions and Product Manufacturability (open access)

Collaborative Evaluation of Early Design Decisions and Product Manufacturability

None
Date: November 28, 2000
Creator: Kleban, S. D.; Stubblefield, W. A.; Mitchiner, K. W.; Mitchiner, J. L. & Arms, R. M.
Object Type: Article
System: The UNT Digital Library
Contract Management: Not Following Procedures Undermines Best Pricing Under GSA's Schedule (open access)

Contract Management: Not Following Procedures Undermines Best Pricing Under GSA's Schedule

A letter report issued by the General Accounting Office with an abstract that begins "The Department of Defense (DOD) spends millions of dollars each year to acquire information technology (IT) services through the General Services Administration's (GSA) Federal Supply Schedule (FSS). However, DOD has not been taking steps critical to ensuring that it gets the best services at the best prices. GAO's review of 22 DOD orders revealed that 17 of them were placed without seeking competitive quotes. GSA's established procedures require that agencies seek competitive quotes to ensure that the government gets the best price for IT services. Many DOD contracting officers were unaware of this requirement and placed orders under FSS contracts without seeking quotes from multiple contractors. The Federal Acquisition Regulation covering FSS contracts does not provide clear guidance to contracting officers on these special ordering procedures."
Date: November 28, 2000
Creator: United States. General Accounting Office.
Object Type: Report
System: The UNT Digital Library
Design of a TOF-SANS instrument for the proposed Long Wavelength Target Station at the Spallation Neutron Source. (open access)

Design of a TOF-SANS instrument for the proposed Long Wavelength Target Station at the Spallation Neutron Source.

We have designed a versatile high-throughput SANS instrument [Broad Range Intense Multipurpose SANS (BRIMS)] for the proposed Long Wavelength Target Station at the SNS by using acceptance diagrams and the Los Alamos NISP Monte Carlo simulation package. This instrument has been fully optimized to take advantage of the 10 Hz source frequency (broad wavelength bandwidth) and the cold neutron spectrum from a tall coupled solid methane moderator (12 cm x 20 cm). BRIMS has been designed to produce data in a Q range spanning from 0.001 to 0.7 {angstrom}{sup {minus}1} in a single measurement by simultaneously using neutrons with wavelengths ranging from 1 to 14.5 {angstrom} in a time of flight mode. A supermirror guide and bender assembly is employed to separate and redirect the useful portion of the neutron spectrum with {lambda} > 1 {angstrom}, by 2.3{degree} away from the direct beam containing high energy neutrons and {gamma} rays. The effects of the supermirror coating of the guide, the location of the bender assembly with respect to the source, the bend angle, and various collimation choices on the flux, resolution and Q{sub min} have been characterized using spherical particle and delta function scatterers. The overall performance of BRIMS has …
Date: November 28, 2000
Creator: Thiyagarajan, P.; Littrell, K. & Seeger, P. A.
Object Type: Article
System: The UNT Digital Library
Experimental demonstration of dielectric structure based two beam acceleration. (open access)

Experimental demonstration of dielectric structure based two beam acceleration.

We report on the experimental results of the dielectric based two beam accelerator (step-up transformer). By using a single high charge beam, we have generated and extracted a high power RF pulse from a 7.8 GHz primary dielectric structure and then subsequently transferred to a second accelerating structure with higher dielectric constant and smaller transverse dimensions. We have measured the energy change of a second (witness) beam passing through the acceleration stage. The measured gradient is >4 times the deceleration gradient. The detailed experiment of set-up and results of the measurements are dimmed. Future plans for the development of a 100 MeV demonstration accelerator based on this technique is presented.
Date: November 28, 2000
Creator: Gai, W.; Conde, M. E.; Konecny, R.; Power, J. G.; Schoessow, P.; Sun, X. et al.
Object Type: Article
System: The UNT Digital Library
EXPERIMENTAL EVALUATION OF CHEMICAL SEQUESTRATION OF CARBON DIOXIDE IN DEEP AQUIFER MEDIA - PHASE II (open access)

EXPERIMENTAL EVALUATION OF CHEMICAL SEQUESTRATION OF CARBON DIOXIDE IN DEEP AQUIFER MEDIA - PHASE II

In 1998 Battelle was selected by the U.S. Department of Energy's (DOE) National Energy Technology Laboratory (NETL) under a Novel Concepts project grant to continue Phase II research on the feasibility of carbon dioxide (CO{sub 2}) sequestration in deep saline formations. The focus of this investigation is to conduct detailed laboratory experiments to examine factors that may affect chemical sequestration of CO{sub 2} in deep saline formations. Reactions between sandstone and other geologic media from potential host reservoirs, brine solutions, and CO{sub 2} are being investigated under high-pressure conditions. Some experiments also include sulfur dioxide (SO{sub 2}) gases to evaluate the potential for co-injection of CO{sub 2} and SO{sub 2} related gases in the deep formations. In addition, an assessment of engineering and economic aspects is being conducted. This current Technical Progress Report describes the status of the project as of September 2000. The major activities undertaken during the quarter included several experiments conducted to investigate the effects of pressure, temperature, time, and brine composition on rock samples from potential host reservoirs. Samples (both powder and slab) were taken from the Mt. Simon Sandstone, a potential CO{sub 2} host formation in the Ohio, the Eau Claire Shale, and Rome Dolomite …
Date: November 28, 2000
Creator: Gupta, Neeraj; Sass, Bruce & Ickes, Jennifer
Object Type: Report
System: The UNT Digital Library
Groundwater Monitoring Plan for the Hanford Site 216-B-3 Pond RCRA Facility (open access)

Groundwater Monitoring Plan for the Hanford Site 216-B-3 Pond RCRA Facility

The 216-B-3 Pond was a series of ponds for disposal of liquid effluent from past Hanford production facilities. In 1990, groundwater monitoring at B Pond was elevated from "detection" to assessment status because total organic halides and total organic carbon were found to exceed critical means in two wells. Groundwater quality assessment, which ended in 1996, failed to find any specific hazardous waste contaminant that could have accounted for the isolated occurrences of elevated total organic halides and total organic carbon. Hence, the facility was subsequently returned to detection-level monitoring in 1998. Exhaustive groundwater analyses during the assessment period indicated that only two contaminants, tritium and nitrate, could be positively attributed to the B Pond System, with two others (arsenic and I-129) possibly originating from B Pond. Chemical and radiological analyses of soil at the main pond and 216-B-3-3 ditch has not revealed significant contamination. Based on the observed, minor contamination in groundwater and in the soil column, three parameters were selected for site-specific, semiannual monitoring; gross alpha, gross beta, and specific conductance. Total organic halides and total organic carbon are included as constituents because of regulatory requirements. Nitrate, tritium, arsenic, and iodine-129 will be monitored under the aegis of …
Date: November 28, 2000
Creator: Barnett, D. Brent; Smith, Ronald M. & Chou, Charissa J.
Object Type: Report
System: The UNT Digital Library
HIV-1/AIDS and Military Manpower Policy (open access)

HIV-1/AIDS and Military Manpower Policy

This is a report on the Military man power policy and a screening for HIV-1 AIDS that was performed on all officials 1985.
Date: November 28, 2000
Creator: Burrelli, David F. & Wenaas, Marte
Object Type: Report
System: The UNT Digital Library
Identification of a Hanford Waste Site for Initial Deployment of the In Situ Gaseous Reduction Approach (open access)

Identification of a Hanford Waste Site for Initial Deployment of the In Situ Gaseous Reduction Approach

In Situ Gaseous Reduction is a technology currently being developed by DOE for the remediation of soil waste sites contaminated with hexavalent chromium. This document presents the results of recent characterization activities undertaken at several of the soil waste sites at Hanford that contain siginficant levels of hexavalent chromium contamination. The objective of this study is to select a site for initial deployment of the technology at the Hanford Site.
Date: November 28, 2000
Creator: Thornton, Edward C.; Cantrell, Kirk J.; Faurote, James M.; Gilmore, Tyler J.; Olsen, Khris B. & Schalla, Ronald
Object Type: Report
System: The UNT Digital Library
Identification of a Hanford Waste Site for Initial Deployment of the In Situ Gaseous Reduction Approach (open access)

Identification of a Hanford Waste Site for Initial Deployment of the In Situ Gaseous Reduction Approach

In Situ Gaseous Reduction is a technology currently being developed by DOE for the remediation of soil waste sites contaminated with hexavalent chromium. This document presents the results of recent characterization activities undertaken at several of the soil waste sites at Hanford that contain significant levels of hexavalent chromium contamination. The objective of this study is to select a site for initial deployment of the technology at the Hanford Site.
Date: November 28, 2000
Creator: Thornton, Edward C; Cantrell, Kirk J; Faurote, James M; Gilmore, Terrance J; Olsen, Khris B & Schalla, Ronald
Object Type: Report
System: The UNT Digital Library
Initiation Temperature for Runaway Tri-n-Butyl Phosphate/Nitric Acid Reaction (open access)

Initiation Temperature for Runaway Tri-n-Butyl Phosphate/Nitric Acid Reaction

During a review of the H-Canyon authorization basis, Defense Nuclear Facility Safety Board (DNFSB) staff members questioned the margin of safety associated with a postulated tri-n-butyl phosphate (TBP)/nitric acid runaway reaction due to the inadvertent heating of a canyon tank containing greater than 3000 lbs (1362 kg) of TBP. The margin of safety was partially based on experiments and calculations performed by the Actinide Technology Section (ATS) to support deletion of indication of tank agitation as a Safety Class System. In the technical basis for deletion of this system, ATS personnel conservatively calculated the equilibrium temperature distribution of a canyon tank containing TBP and nitric acid layers which were inadvertently heated by a steam jet left on following a transfer. The maximum calculated temperature (128 degrees C) was compared to the minimum initiation temperature for a runaway reaction (greater than 130 degrees C) documented by experimental work in the mid 195 0s. In this work, the initiation temperature as a function of nitric acid concentration was measured for 0 and 20 wt percent dissolved solids. The DNFSB staff members were concerned that data for 0 wt percent dissolved solids were not conservative given the facts that data for 20 wt …
Date: November 28, 2000
Creator: Rudisill, T.S.
Object Type: Report
System: The UNT Digital Library
Orthoclase surface structure dissolution measured in situ by x-ray reflectivity and atomic force microscopy. (open access)

Orthoclase surface structure dissolution measured in situ by x-ray reflectivity and atomic force microscopy.

Orthoclase (001) surface topography and interface structure were measured during dissolution by using in situ atomic force microscopy (AFM) and synchrotrons X-ray reflectivity at pH 1.1-12.9 and T = 25-84 C. Terrace roughening at low pH and step motion at high pH were the main phenomena observed, and dissolution rates were measured precisely. Contrasting dissolution mechanisms are inferred for low- and high-pH conditions. These observations clarify differences in alkali feldspar dissolution mechanisms as a function of pH, demonstrate a new in situ method for measuring face-specific dissolution rates on single crystals, and improve the fundamental basis for understanding alkali feldspar weathering processes.
Date: November 28, 2000
Creator: Sturchio, N. C.; Fenter, P.; Cheng, L. & Teng, H.
Object Type: Article
System: The UNT Digital Library
Plasma-Based Studies on 4th Generation Light Sources (open access)

Plasma-Based Studies on 4th Generation Light Sources

The construction of a short pulse tunable x-ray laser source will be a watershed for plasma-based and warm dense matter research. The areas we will discuss below can be separated broadly into warn dense matter (WDM) research, laser probing of near solid density plasmas, and laser-plasma spectroscopy of ions in plasmas. The area of WDM refers to that part of the density-temperature phase space where the standard theories of condensed matter physics and/or plasma statistical physics are invalid. Warm dense matter, therefore, defines a region between solids and plasmas, a regime that is found in planetary interiors, cool dense stars, and in every plasma device where one starts from a solid, e.g., laser-solid matter produced plasma as well as all inertial fusion schemes. The study of dense plasmas has been severely hampered by the fact that laser-based methods have been unavailable. The single most useful diagnostic of local plasma conditions, e.g., the temperature (T{sub e}), the density (n{sub e}), and the ionization (Z), has been Thomson scattering. However, due to the fact that visible light will not propagate at electron densities, n{sub e}, {ge} 10{sup 22} cm{sup -3} implies dense plasmas can not be probed. The 4th generation sources, LCLS …
Date: November 28, 2000
Creator: Lee, R. W.; Baldis, H. A.; Cauble, R. C.; Landen, O. L.; Wark, J. S.; Ng, A. et al.
Object Type: Article
System: The UNT Digital Library
Probing the electrical double-layer structure at the rutile-water interface with x-ray standing waves. (open access)

Probing the electrical double-layer structure at the rutile-water interface with x-ray standing waves.

We demonstrate that the X-ray standing wave (XSW) technique is a powerful probe of the electrical double-layer (EDL) structure. Measurements were made of Sr adsorption at the rutile (110)-water interface from aqueous solutions. Our results show that Bragg XSW, using small-period standing waves generated by Bragg diffraction from the substrate, precisely probes the location of ions within the condensed layer, and the in situ partitioning of ions between the condensed and diffuse layers. Such measurements can provide important constraints for the development and verification of theoretical models that describe ion adsorption at the solid-water interface.
Date: November 28, 2000
Creator: Fenter, P.; Cheng, L.; Rihs, S.; Machesky, M.; Bedzyk, M. J. & Sturchio, N. C.
Object Type: Article
System: The UNT Digital Library
Proton reaction cross sections measured in the BNL/AGS E943 experiment (open access)

Proton reaction cross sections measured in the BNL/AGS E943 experiment

We have measured proton reaction cross sections over a wide mass and energy range at the Brookhaven AGS accelerator. The samples were elemental Be, C, Al, Cu, W, and Pb; the measurements were carried out at ten incident proton kinetic energies in the range 0.54 to 7.8 GeV. The experiment was similar to an earlier experiment in the 200-550 MeV range by Renberg et al. The new results are in good agreement with those of Renberg et al. at the overlap point near 550 MeV. The combined results of the two experiments show an energy dependence expected from the behavior of the nucleon-nucleon cross sections. The results are reproduced by calculations based on variants of the impulse approximation and Glauber theory.
Date: November 28, 2000
Creator: Dietrich, F S; Hartouni, E P; Schmid, G J; Soltz, R; Abfalterer, W P; Haight, R C et al.
Object Type: Article
System: The UNT Digital Library
Radiolysis of TcO4- in alkaline, nitrate solutions: Reduction by NO{sub 3}{sup 2-} (open access)

Radiolysis of TcO4- in alkaline, nitrate solutions: Reduction by NO{sub 3}{sup 2-}

None
Date: November 28, 2000
Creator: Lukens, Wayne W., Jr.; Bucher, Jerome J.; Edelstein, Norman M. & Shuh, David K.
Object Type: Article
System: The UNT Digital Library
Raman and infrared studies of the Sharp 890 cm{sup -1} mode in organic superconductors. (open access)

Raman and infrared studies of the Sharp 890 cm{sup -1} mode in organic superconductors.

Raman and infrared spectra of several organic superconductors are presented, showing some unusual behaviors of a sharp line at 890 cm{sup {minus}} in both spectra. These include a frequency shift below T{sub c}, a positive deuterium isotope shift, frequency softening at low temperatures and sensitivity to lattice superstructure. It is proposed that either the ion or the neutral molecule has a distortion with a strong v{sub 60}(B{sub 3g}) mode component.
Date: November 28, 2000
Creator: Eldridge, J. E.; Lin, Y.; Schlueter, J. A.; Wang, H. H. & Kini, A. M.
Object Type: Article
System: The UNT Digital Library
Renewable Energy for Microenterprise (open access)

Renewable Energy for Microenterprise

This guide provides readers with a broad understanding of the potential benefits that current renewable energy technologies can offer rural microenterprises. It also introduces the institutional approaches that have been developed to make RE technologies accessible to microentrepreneurs and the challenges that these entrepreneurs have encountered.
Date: November 28, 2000
Creator: Allderdice, A. & Rogers, J. H.
Object Type: Book
System: The UNT Digital Library
Renewable Energy for Rural Schools (open access)

Renewable Energy for Rural Schools

This publication addresses the need for energy in schools, primarily those schools that are not connected to the electric grid. This guide will apply mostly to primary and secondary schools located in non-electrified areas. In areas where grid power is expensive and unreliable, this guide can be used to examine other energy options to conventional power. The authors' goal is to help the reader to accurately assess a school's energy needs, evaluate appropriate and cost-effective technologies to meet those needs, and to implement an effective infrastructure to install and maintain the hardware.
Date: November 28, 2000
Creator: Jimenez, A.C. & Lawand, T.
Object Type: Book
System: The UNT Digital Library
Saltwell Leak Detector Station Programmable Logic Controller (PLC) Software Configuration Management Plan (SCMP) (open access)

Saltwell Leak Detector Station Programmable Logic Controller (PLC) Software Configuration Management Plan (SCMP)

This document provides the procedures and guidelines necessary for computer software configuration management activities during the operation and maintenance phases of the Saltwell Leak Detector Stations as required by HNF-PRO-309, Rev. 1, Computer Software Quality Assurance, Section 2.4, Software Configuration Management. The software configuration management plan (SCMP) integrates technical and administrative controls to establish and maintain technical consistency among requirements, physical configuration, and documentation for the Saltwell Leak Detector Station Programmable Logic Controller (PLC) software during the Hanford application, operations and maintenance. This SCMP establishes the Saltwell Leak Detector Station PLC Software Baseline, status changes to that baseline, and ensures that software meets design and operational requirements and is tested in accordance with their design basis.
Date: November 28, 2000
Creator: WHITE, K.A.
Object Type: Report
System: The UNT Digital Library
Strength Testing and Fractography of MEMS Materials (open access)

Strength Testing and Fractography of MEMS Materials

None
Date: November 28, 2000
Creator: Glass, S.J.; Lavan, D.; Buchheit, T.E. & Jackson, K.
Object Type: Article
System: The UNT Digital Library