UNT Libraries Government Documents Department - 10,009 Matching Results

Search Results

Results: 1 - 24 next
open access

A 3-D ray-trace model for an AMR code on distributed processors

Description: Distributed memory AMR codes provide a special challenge for laser ray-trace modeling. For RAGE we follow the energy-carrying rays through each cell, checking for crossings which require collection a new cell index (1 of 9 in 2D). Density gradients for ray deflections can be calculated 'on the fly.' Substantial excursions must be made from the legacy PIC particle area-weighting approach, but this serves as a useful 1st step. Similarly, IDL now offers a quick graphical rendering, while ENSIGHT g… more
Date: January 1, 2002
Creator: Mason, R. J. (Rodney J.)
Item Type: Refine your search to only Article
open access

25 years of technical advances in RFQ accelerators

Description: The radio frequency quadrupole (RFQ) accelerator began as 'The ion linear accelerator with space-uniform strong focusing' conceived by I. M. Kapchinskii and V. A. Teplyakove. In 1979, R. H. Stokes, K. R. Crandall, J. E. Stovall and D. A. Swenson gave this concept the name RFQ. And by 1983, at least 15 laboratories throughout the world were working on various FWQ designs. In the early years, there were many types of geometry considered for the RFQ, but only a few types have survived. The two cav… more
Date: January 1, 2002
Creator: Young, L. M. (Lloyd M.)
Item Type: Refine your search to only Article
open access

148-Gd cross section measurements for accelerator target facilities

Description: In a series of experiments at LANSCE's WNR facility, 148Gdp roduction was measured for 600- and 800-MeV protons on tungsten, tantalum, and gold. These experiments used 3 pm thin W, Ta, and Au foils and 10 pm thin A1 activation foils, Spallation yields were determined for many short-lived and long-lived spallation products with these foils using gamma and alpha spectroscopy.
Date: January 1, 2002
Creator: Corzine, R. K. (R. Karen); Pitcher, E. J. (Eric J.); Devlin, M. J. (Matthew J.) & Hertel, N. E. (Nolan E.)
Item Type: Refine your search to only Article
open access

2001 ''You Have the Power'' campaign [Federal Energy Management Program]. Final technical report

Description: The Tasks of 2001 ''You Have the Power'' campaign by the Federal Energy Management Program (FEMP) are: Task 1--Interagency Planning Meetings; Task 2--Ear Day Event; Task 3--Earth Day and Energy Awareness Month Activities; Task 4--Regional Target; Task 5--Outreach Tools and Campaign Products; Task 6--Private Sector Participation; Task 7--''You Have the Power'' on the FEMP Web Site; and Task 8--Effective Communications.
Date: January 1, 2002
Item Type: Refine your search to only Report
open access

2nd Annual Los Alamos Plutonium Metal Standard Exchange Workshop : "preliminary" results

Description: The Rocky Flats Plutonium (Pu) Metal Sample Exchange program was conducted to insure the quality and intercomparability of measurements such as Pu assay, Pu isotopics, and impurity analyses. This program was discontinued in 1989 after more than 30 years. Los Alamos National Laboratory (LANL) has reestablished the Pu metal exchange program. During the first year, five DOE facilities, Argonne East, Argonne West, Livermore, Los Alamos, and New Brunswick Laboratory, Savannah River and the Atomic We… more
Date: January 1, 2002
Creator: Tandon, L. (Lav) & Slemmons, A. K. (Alice K.)
Item Type: Refine your search to only Article
open access

3D analysis of bainite morphologies and kinetics in alloy steels

Description: Serial sectioning and 3D reconstruction of austenite decomposition products were undertaken in bay-forming ternary steels to better understand their true morphologies in the bay region of their TTT diagrams. Jagged growth interfaces are revealed in allotriomorphic bainite formed at the bay in Fe-0.24C-4M0, contrasting with the idealized geometries often assumed when formulating growth models. This also has implications for experimental thickening kinetics measurments. Examination of the so-call… more
Date: January 1, 2002
Creator: Hackenberg, R. E. (Robert E.); Nordstrom, D. P. (Dale P.) & Shiflet, G. J. (Gary J.)
Item Type: Refine your search to only Article
open access

AC losses in prototype multistrand conductors for warm dielectric cable designs

Description: We report on multiphase ac losses in four-layer prototype multi-strand conductors (PMCs) wound from EITS tape provided by American Superconductor Corporation. These conductors are prototypes warm dielectric cable designs, such as for the US Dept. of Energy's Superconductivity Partnership Initiative Project at Detroit Edison, We report on single phase 'two phaset'(no current in Ihe PMC but with an external ac magnetic field generated by the two normal Conductors arranged at the remaining corners… more
Date: January 1, 2002
Creator: Willis, Jeffrey O.; Maley, Martin P.; Boening, Henirch J.; Coletta, Giacomo; Mele, Renata & Nassi, Marco
Item Type: Refine your search to only Article
open access

Accurate quantification of radioactive materials by x-ray fluorescence : gallium in plutonium metal /.

Description: Two XRF specimen preparation methods were investigated for quantifying gallium in plutonium metal. Gallium in plutonium was chosen here as an example for demonstrating the efficacy of wavelength dispersive XRF for quantifying radioactive materials. The steps necessary to handle such materials safely will also be discussed. Quantification of plutonium samples by a well-established aqueous specimen preparation method resulted in relative precision and accuracy values of well less than 1%. As an a… more
Date: January 1, 2002
Creator: Worley, C. G. (Christopher G.)
Item Type: Refine your search to only Article
open access

Active probing of cloud multiple scattering, optical depth, vertical thickness, and liquid water content using wide-angle imaging LIDAR.

Description: At most optical wavelengths, laser light in a cloud lidar experiment is not absorbed but merely scattered out of the beam, eventually escaping the cloud via multiple scattering. There is much information available in this light scattered far from the input beam, information ignored by traditional 'on-beam' lidar. Monitoring these off-beam returns in a fully space- and time-resolved manner is the essence of our unique instrument, Wide Angle Imaging Lidar (WAIL). In effect, WAIL produces wide-fie… more
Date: January 1, 2002
Creator: Love, Steven P.; Davis, A. B. (Anthony B.); Rohde, C. A. (Charles A.); Tellier, L. L. (Larry L.) & Ho, Cheng,
Item Type: Refine your search to only Article
open access

Active probing of cloud thickness and optical depth using wide-angle imaging LIDAR.

Description: At most optical wavelengths, laser light in a cloud lidar experiment is not absorbed but merely scattered out of the beam, eventually escaping the cloud via multiple scattering. There is much information available in this light scattered far from the input beam, information ignored by traditional 'on-beam' lidar. Monitoring these off-beam returns in a fully space- and time-resolved manner is the essence of our unique instrument, Wide Angle Imaging Lidar (WAIL). In effect, WAIL produces wide-fie… more
Date: January 1, 2002
Creator: Love, Steven P.; Davis, A. B. (Anthony B.); Rohde, C. A. (Charles A.); Tellier, L. L. (Larry L.) & Ho, Cheng,
Item Type: Refine your search to only Article
open access

Active vibration damping in the presence of uncertainties.

Description: Several control design techniques including PlD, LQG, and PPF are investigated For adive vibration damping of a cantilever beam with uncertain boundary conditions. Step disturbances were used to evaluate the performance of the designed controllers.
Date: January 1, 2002
Creator: Farrar, C. R. (Charles R.); Eisenhour, T. A. (Travis A.); Hatchett, S. (Sam) & Salazar, I. (Isaac)
Item Type: Refine your search to only Article
open access

Adaptive control in optical fibers

Description: Adpative control in combination with ultrafast pulse shaping provides a compelling approach to defeat dispersion, distortion and harness nonlinear phenomena on the femtosecond timescale. Ultrafast pulses propagating in optical fibers generate a number of linear and nonlinear effects which affect the pulse during its travel. The main causes stem from the dependence of the index of refraction on frequency (given that short pulses have a large bandwidth) and from the so-called self-action effects … more
Date: January 1, 2002
Creator: Omenetto, F. G. (Fiorenzo G.)
Item Type: Refine your search to only Article
open access

Adaptive Restoration of Airborne Daedalus AADS1268 ATM Thermal Data

Description: To incorporate the georegistration and restoration processes into airborne data processing in support of U.S. Department of Energy's nuclear emergency response task, we developed an adaptive restoration filter for airborne Daedalus AADS1268 ATM thermal data based on the Wiener filtering theory. Preliminary assessment shows that this filter enhances the detectability of small weak thermal anomalies in AADS1268 thermal images.
Date: January 1, 2002
Creator: Yuan, D.; Doak, E.; Guss, P. & Will, A.
Item Type: Refine your search to only Article
open access

Advanced characterization of twins using automated EBSD

Description: This poster describes resuns obtained using an automated, crystallographically-based technique for twin identification. The technique is based on the automated EBSD. The key features of the analysis are identification of potential twin boundaries by their misorientation character, identification of the distinct boundary planes among the symmetrically equiwlent candidates. and validation of these boundaries through comparison with the boundary and twin plane traces in the sample cross section. R… more
Date: January 1, 2002
Creator: Wright, S. I. (Stuart I.); Bingert, J. F. (John F.); Mason, T. A. (Thomas A.) & Larsen, Ryan J.
Item Type: Refine your search to only Article
open access

Advanced characterization of twins using automated electron backscatter diffraction

Description: This paper describes results obtained using an automated, crystallographically-based technique for twin identification. The technique is based on the automated collection of spatially specific orientation measurements by electron backscatter diffraction (EBSD) in the scanning electron microscope (SEM). The key features of the analysis are identification of potential twin boundaries by their misorientation character, identification of the distinct boundary planes among the symmetrically equivale… more
Date: January 1, 2002
Creator: Wright, S. I. (Stuart I.); Bingert, J. F. (John F.); Mason, T. A. (Thomas A.) & Larson, R. J. (Ryan J.)
Item Type: Refine your search to only Article
open access

ADVANCED FLUE GAS CONDITIONING AS A RETROFIT UPGRADE TO ENHANCE PM COLLECTION FROM COAL-FIRED ELECTRIC UTILITY BOILERS

Description: The U.S. Department of Energy and ADA Environmental Solutions are engaged in a project to develop commercial flue gas conditioning additives. The objective is to develop conditioning agents that can help improve particulate control performance of smaller or under-sized electrostatic precipitators on utility coal-fired boilers. The new chemicals will be used to control both the electrical resistivity and the adhesion or cohesivity of the fly ash. There is a need to provide cost-effective and saf… more
Date: January 1, 2002
Creator: Baldrey, Kenneth E.
Item Type: Refine your search to only Report
open access

ADVANCED GASIFICATION-BASED FUEL CONVERSION AND ELECTRIC ENERGY PRODUCTION SYSTEM

Description: Boise Cascade Corporation and the Gas Technology Institute (GTI) are cooperating to develop, demonstrate and place in continuous operation an advanced biomass gasification-based power generation system suitable for near-term commercial deployment in the Forest Products Industry. The system will be used in conjunction with, rather than in place of, existing wood waste fired boilers and flue gas cleanup systems. The novel system will include three advanced technological components based on GTI's … more
Date: January 1, 2002
Creator: Rabovitser, Joseph & Bryan, Bruce
Item Type: Refine your search to only Report
open access

Advanced Hydrotest Facility (AHF) large bore quadrupole focusing magnet system

Description: The Advanced Hydrotest Facility (AHF) at Los Alamos will provide proton radiography of large-scale, dynamic events. The large bore (Case II) quadrupole focusing magnets are a subsystem in this facility, consisting of four complete imaging lines with a total of eight imaging plates and 52 quadrupole magnets. Each large bore quadrupole has an inner winding diameter of 660 mm and provides a gradient of 10.4 T/m with a 300 mm field of view. Each magnet is a two-layer saddle, contained by a three cm… more
Date: January 1, 2002
Creator: Jason, A. J. (Andrew J.); Walstrom, P. L. (Peter L.); Waynert, J. A. (Joseph A.); Schultz, J. (Joel); Camille, R. J.; Antaya, T. (Thomas) et al.
Item Type: Refine your search to only Article
open access

Advanced laser sensing receiver concepts based on FPA technology.

Description: The ultimate performance of any remote sensor is ideally governed by the hardware signal-to-noise capability and allowed signal-averaging time. In real-world scenarios, this may not be realizable and the limiting factors may suggest the need for more advanced capabilities. Moving from passive to active remote sensors offers the advantage of control over the illumination source, the laser. Added capabilities may include polarization discrimination, instantaneous imaging, range resolution, simult… more
Date: January 1, 2002
Creator: Jacobson, P. L. (Phillip L.); Petrin, R. R. (Roger R.); Jolin, J. L. (John L.); Foy, B. R. (Bernard R.); Lowrance, J. L. & Renda, G. (George)
Item Type: Refine your search to only Article
open access

Advanced Stripper Gas Produced Water Remediation, Quarterly Technical Report: October-December 2001

Description: Natural gas and oil production from stripper wells also produces water contaminated with hydrocarbons, and in most locations, salts and trace elements. The hydrocarbons are not generally present in concentrations that allow the operator to economically recover these liquids. Produced liquids, (Stripper Gas Water) which are predominantly water, present the operator with two options; purify the water to acceptable levels of contaminates, or pay for the disposal of the water. The project scope inv… more
Date: January 2002
Creator: Bonner, Harry & Malmquist, Roger
Item Type: Refine your search to only Report
open access

ADVANCED TECHNOLOGIES FOR STRIPPER GAS WELL ENHANCEMENT

Description: As part of Task 1 in Advanced Technologies for Stripper Gas Well Enhancement, Schlumberger-Holditch Reservoir Technologies (H-RT) has joined with two Appalachian Basin producers, Great Lakes Energy Partners, LLC, and Belden & Blake Corporation to develop methodologies for identification and enhancement of stripper wells with economic upside potential. These industry partners have provided us with data for more than 700 wells in northwestern Pennsylvania. Phase 1 goals of this project are to dev… more
Date: January 1, 2002
Creator: Boyer, Charles M., II & MacDonald, Ronald J.
Item Type: Refine your search to only Report
open access

The advancement of public awareness, concerning TRU waste characterization, using a virtual document.

Description: Building public trust and confidence through openness is a goal of the DOE Carlsbad Field Office for the Waste Isolation Pilot Plant (WIPP). The objective of the virtual document described in this paper is to give the public an overview of the waste characterization steps, an understanding of how waste characterization instrumentation works, and the type and amount of data generated from a batch of drums. The document is intended to be published on a web page andlor distributed at public meetin… more
Date: January 1, 2002
Creator: West, Thomas B.; Burns, Timothy P.; Estill, Wesley G.; Riggs, M. J. (Matt J.); Taggart, Daniel P. & Punjak, Wayne A.
Item Type: Refine your search to only Article
Back to Top of Screen