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On possible similarity solutions for three-dimensional incompressible laminar boundary layers 2: similarity with respect to stationary polar coordinates

Description: From Summary: "Solutions of mainstream flow patterns for three-dimensional, laminar, incompressible thin-boundary-layer flows (over flat or slightly curved surfaces) having similarity with respect to stationary polar coordinates in the plane of the surface are derived. The solutions are summarized in a table."
Date: November 1956
Creator: Herzig, Howard Z. & Hansen, Arthur G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analysis of particle motions for a class of three-dimensional incompressible laminar boundary layers

Description: From Introduction: "Results obtained in the experimental investigations of secondary flows in turbomachines (refs. 1 to 3) indicate that information concerning three-dimensional laminar boundary-layer behavior can be of practical value in interpreting and correlating measurements of losses in the turbo-machines for design purposes. Reference 4 gives a theoretical analysis of the overturning (more than mainstream turning) of the three-dimensional laminar boundary layer developed on flat or nearl… more
Date: November 1956
Creator: Hansen, Arthur G. & Herzig, Howard Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A survey of unclassified axial-flow-compressor literature

Description: A survey of unclassified axial-flow-compressor literature is presented in the form of brief reviews of the methods, results, and conclusions of selected reports. The reports are organized into several main categories with subdivisions, and frequent references are made within the individual reviews to pertinent material elsewhere in the survey.
Date: November 8, 1955
Creator: Herzig, Howard Z. & Hansen, Arthur G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Polycrystalline thin-film module and system performance

Description: The Module and System Performance and Engineering Project at the National Renewable Energy Laboratory (NREL) conducts in-situ technical evaluations of photovoltaic (PV) modules and systems (arrays). These evaluations on module/array performance and stability are conducted at the NREL Photovoltaic Outdoor Test Facility (OTF) in Golden, CO. The modules and arrays are located at 39.7{degree}N latitude, 105.2{degree}W longitude, and at 1,782 meters elevation. Currently, two polycrystalline thin-fil… more
Date: November 1, 1995
Creator: Strand, T.; Kroposki, B.; Hansen, R. & Mrig, L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Long-Range Neutron Detection

Description: A neutron detector designed for detecting neutron sources at distances of 50 to 100 m has been constructed and tested. This detector has a large surface area (1 m{sup 2}) to enhance detection efficiency, and it contains a collimator and shielding to achieve direction sensitivity and reduce background. An unusual feature of the detector is that it contains no added moderator, such as polyethylene, to moderate fast neutrons before they reach the {sup 3}He detector. As a result, the detector is se… more
Date: November 24, 1999
Creator: Peurrung, AJ; Stromswold, DC; Hansen, RR; Reeder, PL & Barnett, DS
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Medium-Sized Mammals around a Radioactive Liquid Waste Lagoon at Los Alamos National Laboratory: Uptake of Contaminants and Evaluation of Radio-Frequency Identification Technology

Description: Use of a radioactive liquid waste lagoon by medium-sized mammals and levels of tritium, other selected radionuclides, and metals in biological tissues of the animals were documented at Technical Area 53 (TA-53) of Los Alamos National Laboratory during 1997 and 1998. Rock squirrel (Spermophilus variegates), raccoon (Procyon lotor), striped skunk (Mephitis mephitis), and bobcat (Lynx rufus) were captured at TA-53 and at a control site on the Santa Fe National Forest. Captured animals were anesthe… more
Date: November 1, 1999
Creator: Hansen, Leslie A.; Fresquez, Phil R.; Robinson, Rhonda J.; Huchton, John D. & Foxx, Teralene S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Case studies of sealing methods and materials used in the salt and potash mining industries

Description: Sealing methods and materials currently used in salt and potash industries were surveyed to determine if systems analogous to the shaft seal design proposed for the Waste Isolation Pilot Plant (WIPP) exist. Emphasis was first given to concrete and then expanded to include other materials. Representative case studies could provide useful design, construction, and performance information for development of the WIPP shaft seal system design. This report contains a summary of engineering and constr… more
Date: November 1995
Creator: Eyermann, T. J.; van Sambeek, L. L. & Hansen, F. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Salt-saturated concrete strength and permeability

Description: Laboratory-scale experiments applicable to the use of salt-saturated concrete as a seal material for a transuranic waste repository have been completed. Nitrogen gas permeability measurements were made using a flexible-wall permeameter, a confining pressure of 1 MPa, and gas pressure gradients ranging from 0.3 MPa to 0.75 MPa. Results show that salt-saturated concrete has very low intrinsic permeability with values ranging from 9.4 {times} 10{sup {minus}22} m{sup 2} to 9.7 {times} 10{sup {minus… more
Date: November 1, 1996
Creator: Pfeifle, T. W.; Hansen, F. D. & Knowles, M. K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Transportable Vitrification System: Operational experience gained during vitrification of simulated mixed waste

Description: The Transportable Vitrification System (TVS) is a large-scale, fully-integrated, transportable, vitrification system for the treatment of low-level nuclear and mixed wastes in the form of sludges, soils, incinerator ash, and similar waste streams. The TVS was built to demonstrate the vitrification of actual mixed waste at U. S. Department of Energy (DOE) sites. Currently, Westinghouse Savannah River Company (WSRC) is working with Lockheed Martin Energy Systems (LMES) to apply field scale vitrif… more
Date: November 21, 1996
Creator: Whitehouse, J. C.; Burket, P. R.; Crowley, D. A.; Hansen, E. K.; Jantzen, Carol M.; Smith, M. E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

D-Zero muon readout electronics design

Description: The readout electronics designed for the D{null} Muon Upgrade are described. These electronics serve three detector subsystems and one trigger system. The front-ends and readout hardware are synchronized by means of timing signals broadcast from the D{null} Trigger Framework. The front-end electronics have continuously running digitizers and two levels of buffering resulting in nearly deadtimeless operation. The raw data is corrected and formatted by 16- bit fixed point DSP processors. These pr… more
Date: November 1, 1996
Creator: Baldin, B.; Hansen, S.; Los, S.; Matveev, M. & Vaniev, V.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Computational models to quantify uncertain emergency search techniques -- A comparison of measured and synthetic gamma-ray detector response functions

Description: As recent world events show, criminal and terrorist access to nuclear materials is a growing national concern. The national laboratories have developed quantitative models to simulate the response of detection equipment when looking for lost or stolen nuclear material. SYNTH, a code written to synthesize typical gamma-ray spectroscopy experiments, and QUEST, a model to Quantify Uncertain Emergency Search Techniques, calculate the response functions of gamma-ray detectors for arbitrary source ty… more
Date: November 1, 1997
Creator: Johnson, M. M.; Goldsby, M. E.; Wilcox, W. B.; Hensley, W. K. & Hansen, R. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Validation Testing of Procedures for Determining the Performance of Stand-Alone Photovoltaic Systems

Description: Standard test procedures, ''IEEE P1526/D1 Draft Recommended Practice for Testing the Performance of Stand-Alone Photovoltaic Systems,'' [1] have been developed to assess the performance of stand-alone PV systems tested outdoors under prevailing conditions. A copy of the procedures is included in Appendix E. This report presents an overview of the procedures and results from three validation tests conducted between January 1999 and September 2000 at one European and four US test sites. There was… more
Date: November 27, 2000
Creator: McNutt, P.; Kroposki, B.; Hansen, R.; DeBlasio, R.; Lynn, K.; Wilson, W. et al.
Item Type: Refine your search to only Report
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
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

High-purity, isotopically enriched bulk silicon

Description: The synthesis and characterization of dislocation-free, undoped, single crystals of Si enriched in all 3 stable isotopes is reported: {sup 28}Si (99.92%), {sup 29}Si (91.37%), and {sup 30}Si (89.8%). A silane-based process compatible with the relatively small amounts of isotopically enriched precursors that are practically available was used. The silane is decomposed to silicon on a graphite starter rod heated to 700-750 C in a recirculating flow reactor. A typical run produces 35 gm of polycry… more
Date: November 17, 2004
Creator: Ager, J. W., III; Beeman, J. W.; Hansen, W. L.; Haller, E. E.; Sharp, I. D.; Liao, C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Deuteron photodisintegration : new results from TJNAF.

Description: The first measurements of the differential cross section from d({gamma},p)n up to 4.0 GeV were performed at the Thomas Jefferson National Accelerator Facility (TJNAF, formerly CEBAF). Bremsstrahlung photons from electron beam impinging on a copper radiator and a liquid deuterium target were employed for this experiment. The experiment was performed in Hall C where the photoprotons at forward angles in the center-of-mass were detected in the High Momentum Spectrometer (HMS) and photoprotons at b… more
Date: November 18, 1997
Creator: Abbott, D. J.; Ahmidouch, A.; Armstrong, C. S.; Arrington, J.; Cummings, W. J.; Geesaman, D. F. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The Cold Dark Matter Search test stand warm electronics card

Description: A card which does the signal processing for four SQUID amplifiers and two charge sensitive channels is described. The card performs the same functions as is presently done with two custom 9U x 280mm Eurocard modules, a commercial multi-channel VME digitizer, a PCI to GPIB interface, a PCI to VME interface and a custom built linear power supply. By integrating these functions onto a single card and using the power over Ethernet standard, the infrastructure requirements for instrumenting a Cold D… more
Date: November 1, 2010
Creator: Hines, Bruce; /Colorado U., Denver; Hansen, Sten; /Fermilab; Huber, Martin; /Colorado U., Denver et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A GERMANIUM FIELD-EFFECT TRANSISTOR MADE FROM A HIGH-PURITY SUBSTRATE

Description: Field effect transistors have been fabricated on high-purity germanium substrates using low-temperature technology. The aim of this work is to preserve the low density of trapping centers in high-quality starting material by low-temperature (< 350 C) processing. The use of germanium promises to eliminate some of the traps which cause generation-recombination noise in silicon field-effect transistors (FET's) at low temperatures. Typically, the transconductance (g{sub m}) in the germanium FET'… more
Date: November 1, 1978
Creator: Hansen, William L.; Goulding, Frederick S. & Haller, Eugene E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

ADMINISTRATIVE AND ENGINEERING CONTROLS FOR THE OPERATION OF VENTILATION SYSTEMS FOR UNDERGROUND RADIOACTIVE WASTE STORAGE TANKS

Description: Liquid radioactive wastes from the Savannah River Site are stored in large underground carbon steel tanks. The majority of the waste is confined in double shell tanks, which have a primary shell, where the waste is stored, and a secondary shell, which creates an annular region between the two shells, that provides secondary containment and leak detection capabilities should leakage from the primary shell occur. Each of the DST is equipped with a purge ventilation system for the interior of the … more
Date: November 13, 2013
Creator: Wiersma, B. & Hansen, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

The First Experiments on the National Ignition Facility

Description: A first set of laser-plasma interaction, hohlraum energetics and hydrodynamic experiments have been performed using the first 4 beams of the National Ignition Facility (NIF), in support of indirect drive Inertial Confinement Fusion (ICF) and High Energy Density Physics (HEDP). In parallel, a robust set of optical and x-ray spectrometers, interferometer, calorimeters and imagers have been activated. The experiments have been undertaken with laser powers and energies of up to 8 TW and 17 kJ in fl… more
Date: November 11, 2005
Creator: Landen, O. L.; Glenzer, S.; Froula, D.; Dewald, E.; Suter, L. J.; Schneider, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hybrid atomic models for spectroscopic plasma diagnostics

Description: We propose a hybrid approach to treating atomic structure and rates in collisional-radiative models, combining the completeness of highly averaged models with the accuracy of detailed models. The hybrid scheme supplements a small subset of coronally accessible fine structure levels with a complete set of configuration- and superconfiguration-averaged levels and produces spectra based on transitions among a mix of fine-structure and relativistic configuration-averaged levels. Convenient expressi… more
Date: November 17, 2006
Creator: Hansen, S B; Bauche, J; Bauche-Arnoult, C & Gu, M F
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

SciDAC Visualization and Analytics Center for EnablingTechnology

Description: The SciDAC2 Visualization and Analytics Center for EnablingTechnologies (VACET) began operation on 10/1/2006. This document, dated11/27/2006, is the first version of the VACET project management plan. Itwas requested by and delivered to ASCR/DOE. It outlines the Center'saccomplishments in the first six weeks of operation along with broadobjectives for the upcoming future (12-24 months).
Date: November 28, 2006
Creator: Bethel, E. Wes; Johnson, Chris; Joy, Ken; Ahern, Sean; Pascucci,Valerio; Childs, Hank et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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