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Object-Oriented Analysis Code for Hall A Vertical Drift Chambers

Description: The high-resolution spectrometers in Jefferson Lab's Hall A use vertical drift chambers to determine charged particle tracks. The current analysis code for the vertical drift chambers is difficult to maintain and modify, which has prompted the development of an object-oriented version, which will be easier to maintain and more able to adapt to changes in the detector configuration. However, the object-oriented approach involves using a slightly different algorithm than ESPACE, which could lead … more
Date: January 1, 2002
Creator: Robbins, J. & Hansen, J.O.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Apparatus and Method for Increasing the Diameter of Metal Alloy Wires Within a Molten Metal Pool

Description: In a dip forming process the core material to be coated is introduced directly into a source block of coating material eliminating the need for a bushing entrance component. The process containment vessel or crucible is heated so that only a portion of the coating material becomes molten, leaving a solid portion of material as the entrance port of, and seal around, the core material. The crucible can contain molten and solid metals and is especially useful when coating core material with reacti… more
Date: January 29, 2002
Creator: Hartman, Alan D.; Argetsinger, Edward R.; Hansen, Jeffrey S.; Paige, Jack I.; King, Paul E. & Turner, Paul C.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Habitats at Risk: Global Warming and Species Loss in Globally Significant Terrestrial Ecosystems

Description: This report studies how global warming could affect the planet's "crown jewels" of nature and rates Canada among those most vulnerable. Released by the David Suzuki Foundation and the World Wildlife Fund, the report highlights the urgent need to reduce greenhouse gas emissions.
Date: February 2002
Creator: Malcolm, Jay R.; Liu, Canran; Miller, Laurie B.; Allutt, Tom & Hansen, Lara
Item Type: Refine your search to only Text
Partner: UNT Libraries
open access

Commercial Decommissioning at DOE's Rocky Flats

Description: Due in large part to the number of nuclear facilities that make up the DOE complex, DOE-EM work has historically been paperwork intensive and driven by extensive regulations. Requirements for non-nuclear facilities are often grouped with those of nuclear facilities, driving up costs. Kaiser-Hill was interested in applying a commercial model to demolition of these facilities and wanted to apply necessary and sufficient standards to the work activities, but avoid applying unnecessary requirements… more
Date: February 25, 2002
Creator: Freiboth, C.; Sandlin, N.; Schubert, A. & Hansen, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Laboratory Directed Research and Development Program FY 2001

Description: The Ernest Orlando Lawrence Berkeley National Laboratory (Berkeley Lab or LBNL) is a multi-program national research facility operated by the University of California for the Department of Energy (DOE). As an integral element of DOE's National Laboratory System, Berkeley Lab supports DOE's missions in fundamental science, energy resources, and environmental quality. Berkeley Lab programs advance four distinct goals for DOE and the nation: (1) To perform leading multidisciplinary research in the… more
Date: March 15, 2002
Creator: Hansen, Todd & Levy, Karin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Dopant and self-diffusion in extrinsic n-type silicon isotopically controlled heterostructures

Description: We present experimental results of dopant- and self-diffusion in extrinsic silicon doped with As. Multilayers of isotopically controlled {sup 28}Si and natural silicon enable simultaneous analysis of {sup 30}Si diffusion into the {sup 28}Si enriched layers and dopant diffusion throughout the multilayer structure. In order to suppress transient enhanced self- and dopant diffusion caused by ion implantation, we adopted a special approach to dopant introduction. First, an amorphous 250-nm thick Si… more
Date: April 1, 2002
Creator: Silvestri, Hughes H.; Sharp, Ian D.; Bracht, Hartmut A.; Nicols, Sam P.; Beeman, Jeff W.; Hansen, John et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Self- and dopant diffusion in extrinsic boron doped isotopically controlled silicon multilayer structures

Description: Isotopically controlled silicon multilayer structures were used to measure the enhancement of self- and dopant diffusion in extrinsic boron doped silicon. {sup 30}Si was used as a tracer through a multilayer structure of alternating natural Si and enriched {sup 28}Si layers. Low energy, high resolution secondary ion mass spectrometry (SIMS) allowed for simultaneous measurement of self- and dopant diffusion profiles of samples annealed at temperatures between 850 C and 1100 C. A specially design… more
Date: April 1, 2002
Creator: Sharp, Ian D.; Bracht, Hartmut A.; Silvestri, Hughes H.; Nicols, Samuel P.; Beeman, Jeffrey W.; Hansen, John L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SUSY dark matter and non-universal gaugino masses

Description: In this talk the authors investigate the dark matter prospects for supersymmetric models with non-universal gaugino masses. They motivate the use of non-universal gaugino masses from several directions, including problems, with the current favorite scenario, the cMSSM. They then display new corridors of parameter space that allow an acceptable dark matter relic density once gaugino mass universality is relaxed. They finish with a specific string-derived model that allows this universality relax… more
Date: April 15, 2002
Creator: Birkedal-Hansen, Andreas
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Technology Development, Evaluation, and Application (TDEA) FY 2001 Progress Report Environment, Safety, and Health (ESH) Division

Description: This progress report presents the results of 11 projects funded ($500K) in FY01 by the Technology Development, Evaluation, and Application (TDEA) Committee of the Environment, Safety, and Health Division (ESH). Five projects fit into the Health Physics discipline, 5 projects are environmental science and one is industrial hygiene/safety. As a result of their TDEA-funded projects, investigators have published sixteen papers in professional journals, proceedings, or Los Alamos reports and present… more
Date: May 1, 2002
Creator: Hoffman, L. G.; Alvar, K.; Buhl, T.; Foltyn, E.; Hansen, W.; Erdal, B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Electroproduction of strangeness on light nuclei.

Description: The A(e,e{prime} K{sup +})YX reaction has been investigated in Hall C at Jefferson Laboratory for 6 different targets. Data were taken for Q{sup 2} {approx} 0.35 and 0.5 GeV{sup 2} at a beam energy of 3.245 GeV for {sup 1}H, {sup 2}H, {sup 3}He, {sup 4}He, C and Al targets. The missing mass spectra are fitted with Monte Carlo simulations taking into account the production of {Lambda} and {Sigma}{sup 0} hyperon production off the proton, and {Sigma}{sup -} off the neutron. Models for quasifree p… more
Date: May 16, 2002
Creator: Dohrmann, F.; Abbott, D.; Ahmidouch, A.; Ambrozewicz, P.; Armstrong, C. S.; Arrington, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Pre-treating Seed to Enhance Germination of Desert Shrubs

Description: Creosotebush [Larrea tridentata (D.C.) Cav.] and white bursage [Ambrosia dumosa (A. Gray) W.W. Payne] seeds were subjected to pre-treatments of rinsing and soaking in water and thiourea to enhance germination in laboratory experiments. The effects of darkness, temperature, seed source, and soil moisture were also evaluated in the laboratory. The best pre-treatment from the laboratory experiments, rinsing with water for 36 hours followed by drying, was field-tested at Fort Irwin, California. Two… more
Date: June 1, 2002
Creator: Ostler, W. K.; Anderson, D. C. & Hansen, D. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hyperon-nucleon bound states and electroproduction of strangeness on light nuclei.

Description: The A(e,e{prime}K{sup +})Y X reaction has been investigated in Hall C at Jefferson Lab. Data were taken for Q{sup 2} {approx} 0.35 and 0.5 GeV{sup 2} at a beam energy of 3.245 GeV for {sup 1}H, {sup 2}H, {sup 3}He and {sup 4}He, C and Al targets. The missing mass spectra are fitted with Monte Carlo simulations including {Lambda}, {Sigma}{sup 0}, {Sigma}{sup -} hyperon production. Models for quasifree production are compared to the data, excess yields close to threshold are attributed to FSI. Ev… more
Date: June 25, 2002
Creator: Dohrmann, F.; Abbott, D.; Ahmidouch, A.; Ambrozewicz, P.; Armstrong, C. S.; Arrington, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Experimental EOS and Chemical Studies of High-Pressure Detonation Products and Product Mixtures

Description: We present equation of state results from impulsively stimulated light scattering (ISLS) experiments conducted in diamond anvil cells on pure supercritical fluids, and supercritical fluid mixtures. We have made measurements on fluid H2O (water), CH2O (formaldehyde), and CH3OH (methanol). Sound speeds measured through ISLS have allowed us to refine existing potential models used in the EXP6 detonation product library [Fried, L. E., and Howard, W. M., J. Chem. Phys. 109 (17): 7338-7348 (1998).]. … more
Date: July 1, 2002
Creator: Zaug, J. M.; Fried, L. E.; Crowhurst, J. C.; Hansen, D. W.; Howard, W. M.; Lee, G. S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Introduction to Methods Demonstrations for Authentication

Description: During the Trilateral Initiative Technical Workshop on Authentication & Certification, PNNL will demonstrate some authentication technologies. This paper briefly describes the motivation for these demonstrations and provide background on them.
Date: July 15, 2002
Creator: Kouzes, Richard T.; Hansen, Randy R. & Pitts, W. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

One-piece, composite crucible with integral withdrawal/discharge section

Description: A one-piece, composite open-bottom casting mold with integral withdrawal section is fabricated by thermal spraying of materials compatible with and used for the continuous casting of shaped products of reactive metals and alloys such as, for example, titanium and its alloys or for the gas atomization thereof.
Date: July 30, 2002
Creator: Besser, Matthew; Terpstra, Robert L. (Iowa State Univ., Ames, IA); Sordelet, Daniel J.; Anderson, Iver E.; Hartman, Alan D.; Argetsinger, Edward R. et al.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Experimental EOS and Chemical Studies of High-Pressure Detonation Products and Product Mixtures

Description: We present equation of state results from impulsively stimulated light scattering (ISLS) experiments conducted in diamond anvil cells on pure supercritical fluids, and supercritical fluid mixtures. We have made measurements on fluid H2O (water), CH2O (formaldehyde), and CH3OH (methanol). Sound speeds measured through ISLS have allowed us to refine existing potential models used in the Em6 detonation product library [Fried, L. E., and Howard, W. M., J. Chem. Phys. 109 (17): 7338-7348 (1998).]. T… more
Date: August 6, 2002
Creator: Zaug, J. M.; Fried, L. E.; Crowhurst, J. C.; Hansen, D. W.; Howard, W. M.; Lee, G. S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chemistry at Extreme Conditions

Description: We present equation of state results from impulsively stimulated light scattering (ISLS) experiments conducted in diamond anvil cells on pure supercritical fluids. We have made measurements on fluid H{sub 2}O (water), and CH{sub 3}OH (methanol). Sound speeds measured through ISLS have allowed us to refine existing potential models used in the exponential-6 (EXP-6) detonation product library [Fried, L. E., and Howard, W. M., J. Chem. Phys. 109 (17): 7338-7348 (1998).]. The refined models allow u… more
Date: August 8, 2002
Creator: Zaug, J M; Fried, L E; Abramson, E H; Hansen, D W; Crowhurst, J C & Howard, W M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Large historical changes of fossil-fuel black carbon aerosols

Description: Anthropogenic emissions of fine black carbon (BC) particles, the principal light-absorbing atmospheric aerosol, have varied during the past century in response to changes of fossil-fuel utilization, technology developments, and emission controls. We estimate historical trends of fossil-fuel BC emissions in six regions that represent about two-thirds of present day emissions and extrapolate these to global emissions from 1875 onward. Qualitative features in these trends show rapid increase in th… more
Date: September 26, 2002
Creator: Novakov, T.; Ramanathan, V.; Hansen, J.E.; Kirchstetter, T.W.; Sato, M.; Sinton, J.E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Vegetation Change Analysis User's Manual

Description: Approximately 70 percent of all U.S. military training lands are located in arid and semi-arid areas. Training activities in such areas frequently adversely affect vegetation, damaging plants and reducing the resilience of vegetation to recover once disturbed. Fugitive dust resulting from a loss of vegetation creates additional problems for human health, increasing accidents due to decreased visibility, and increasing maintenance costs for roads, vehicles, and equipment. Diagnostic techniques a… more
Date: October 2002
Creator: Hansen, D. J. & Ostler, W. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Effect of pH on Nickel Alloy SCC and Corrosion Performance

Description: Alloy X-750 condition HTH stress corrosion crack growth rate (SCCGR) tests have been conducted at 360 C (680 F) with 50 cc/kg hydrogen as a function of coolant pH. Results indicate no appreciable influence of pH on crack growth in the pH (at 360 C) range of {approx} 6.2 to 8.7, consistent with previous alloy 600 findings. These intermediate pH results suggest that pH is not a key variable which must be accounted for when modeling pressurized water reactor (PWR) primary water SCC. In this study,… more
Date: October 10, 2002
Creator: Morton, D.S. & Hansen, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Polarization Transfer in the He-4(polarized-e, e-prime polarized-p)H-3 Reaction up to Q{sup 2}=2.6 (GeV/c){sup 2}

Description: We have measured the proton recoil polarization in the {sup 4}He(polarized-e, e-prime, p){sup 3}H reaction at Q{sup 2} = 0.5, 1.0, 1.6, and 2.6 (GeV/c){sup 2}. The measured ratio of polarization transfer coefficients differs from a fully relativistic calculation, favoring the inclusion of a predicted medium modification of the proton form factors based on a quark-meson coupling model. In contrast, the measured induced polarizations agree reasonably well with the fully relativistic calculation i… more
Date: November 1, 2002
Creator: Strauch, S.; Dieterich, S.; Aniol, K. A.; Annand, J. R. M.; Baker, O. K.; Bertozzi, W. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The D0 solenoid NMR magnetometer

Description: A field monitoring system for the 2 Tesla Solenoid of the D0 detector is described. It is comprised of a very small NMR probe cabled to a DSP based signal processing board. The design magnetic field range is from 1.0 to 2.2 Tesla, corresponding to an RF frequency range of 42.57 to 93.67 MHz. The desired an accuracy is one part in 10{sup 5}. To minimize material in the interaction region of the D0 detector, the overall thickness of the NMR probe is 4 mm, including its mounting plate, and its wid… more
Date: November 20, 2002
Creator: Sten Uldall Hansen Terry Kiper, Tom Regan, John Lofgren et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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