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open access

A novel condenser for EUV lithography ring-field projection optics

Description: A condenser for a ring-field extreme ultra-violet (EUV) projection lithography camera is presented. The condenser consists of a gently undulating mirror, that we refer to as a ripple plate, and which is illuminated by a collimated beam at grazing incidence. The light is incident along the ripples rather than across them, so that the incident beam is reflected onto a cone and subsequently focused on to the arc of the ring field. A quasistationary illumination is achieved, since any one field poi… more
Date: July 15, 1999
Creator: Chapman, H. & Nugent, K. A.
Partner: UNT Libraries Government Documents Department
open access

Recent results from the super EBIT

Description: The Super EBIT device at LLNL can produce and trap any highly charged ion at rest in the laboratory, including bare U{sup 92+} ions. Recently, the ionization cross sections for high-Z hydrogenlike ions have been measured for the first time, and measurements of the L-shell ionization cross sections for uranium ions are in progress. The two-electron contributions to the ground state energies of heliumlike ions have been directly measured using a novel technique, and spectra of 2s-2p transitions i… more
Date: September 15, 1995
Creator: Marrs, R.E.
Partner: UNT Libraries Government Documents Department
open access

A Correlated Study of the Response of a Satellite to Acoustic Radiation Using Statistical Energy Analysis and Acoustic Test Data

Description: Aerospace payloads, such as satellites, are subjected to vibroacoustic excitation during launch. Sandia's MTI satellite has recently been certified to this environment using a combination of base input random vibration and reverberant acoustic noise. The initial choices for the acoustic and random vibration test specifications were obtained from the launch vehicle Interface Control Document (ICD). In order to tailor the random vibration levels for the laboratory certification testing, it was ne… more
Date: November 15, 1999
Creator: Cap, Jerome S. & Tracey, Brian
Partner: UNT Libraries Government Documents Department
open access

Improved Oil Recovery in Fluvial Dominated Deltaic Reservoirs of Kansas - Near-Term

Description: The objective of this study is to study waterflood problems of the type found in Morrow sandstone. The major tasks undertaken are reservoir characterization and the development of a reservoir database; volumetric analysis to evaluate production performance; reservoir modeling; identification of operational problems; identification of unrecovered mobile oil and estimation of recovery factors; and identification of the most efficient and economical recovery process.
Date: October 15, 1997
Creator: Walton, A.; McCune, D.; Green, D.W.; Willhite, G.P.; Watney, L.; Michnick, M. et al.
Partner: UNT Libraries Government Documents Department
open access

A study of the Teachers` Academy for Mathematics and Science

Description: The Teachers` Academy for Mathematics and Science in Chicago (TAMS) is a freestanding institution founded in 1989 by scientists and a variety of other stakeholders, to advance the systemic reform of mathematics and science education in Chicago`s public schools. It focuses on the ``re-tooling`` of its elementary level teachers. The TAMS program, which has been funded in part by the DOE, contributes to strategic goals two through five of the Office of University and Science Education (OUSE). This… more
Date: September 15, 1994
Creator: Brett, B.; Scheirer, M.A. & Raizen, S.
Partner: UNT Libraries Government Documents Department
open access

Nesting bird deterrents for the Federal Republic of Germany glass log storage pad

Description: A proposed storage pad wi11 be constructed in the 200 West Area for the storage of isotopic heat and radiation sources from the Federal Republic of Germany. The pad will be constructed in the southern portion of the Solid Waste Operations Complex near the existing Sodium Storage Pad (Figure 1). Following a biological review by Pacific Northwest National Laboratory (PNNL) personnel (Brandt 1996), it was determined that in order for construction to take place after March 15, 1997, actions would n… more
Date: April 15, 1997
Creator: Mitchell, R.M.
Partner: UNT Libraries Government Documents Department
open access

Increased oil production and reserves from improved completion techniques in the Bluebell Field, Uinta Basin, Utah. Quarterly technical progress report, July 1, 1995--September 30, 1995

Description: The objective of this project is to increase oil production and reserves in the Uinta Basin by demonstrating improved completion techniques. Low productivity of Uinta Basin wells is caused by gross production intervals of several thousand feet that contain perforated thief zones and water-bearing zones, and unperforated oil-bearing intervals. Geologic and engineering characterization and computer simulation of the Green River and Wasatch Formations in the Bluebell field will determine reservoir… more
Date: October 15, 1995
Creator: Allison, E. & Morgan, C. D.
Partner: UNT Libraries Government Documents Department
open access

Thermal and Fluid Flow Brazing Simulations

Description: The thermal response of fixtured parts in a batch-type brazing furnace can require numerous, time-consuming development runs before an acceptable furnace schedule or joint design is established. Powerful computational simulation tools are being developed to minimize the required number of verification experiments, improve furnace throughput, and increase product yields. Typical furnace simulations are based on thermal, fluid flow, and structural codes that incorporate the fundamental physics of… more
Date: December 15, 1999
Creator: Hosking, Floyd Michael; Gianolakis, Steven E.; Givler, Richard C. & Schunk, P. Randall
Partner: UNT Libraries Government Documents Department
open access

Directional dependency of air sampling; Research and development grant {number_sign}4

Description: A field study was performed by Idaho State University-Environmental Monitoring Laboratory (EML) to examine the directional dependency of low-volume air samplers. A typical continuous low volume air sampler contains a sample head that is mounted on the sampler housing either horizontally through one of four walls or vertically on an exterior wall `looking down or up.` In 1992, a field study was undertaken to estimate sampling error and to detect the directional effect of sampler head orientation… more
Date: January 15, 1994
Partner: UNT Libraries Government Documents Department
open access

Iodine-129 Dose in LLW Disposal Facility Performance Assessments

Description: Iodine-129 has the lowest Performance Assessment derived inventory limit in SRS disposal facilities. Because iodine is concentrated in the body to one organ, the thyroid, it has been thought that dilution with stable iodine would reduce the dose effects of 129I.Examination of the dose model used to establish the Dose conversion factor for 129I shows that, at the levels considered in performance assessments of low-level waste disposal facilities, the calculated 129I dose already accounts for ing… more
Date: October 15, 1999
Creator: Wilhite, E.L.
Partner: UNT Libraries Government Documents Department
open access

Comparison of the crevice corrosion resistance of alloys 625 and 22

Description: The Yucca Mountain Site Characterization Project is concerned with the corrosion resistance of candidate engineered waste package materials. A variety of waste package designs have been proposed for US and Canadian High Level Nuclear Waste Repositories. A common feature of each design is the possibility of utilizing a corrosion resistant material such as a nickel-based super alloy or titanium-based alloy. A suitable corrosion resistant material may provide (a) kinetic immunity if the combinatio… more
Date: September 15, 1999
Creator: Palmer, J.; Kehler, B.; Iloybare, G. O. & Scully, J. R.
Partner: UNT Libraries Government Documents Department
open access

Tritium Loading of Pinellas U-Bed No. 874

Description: The DOE-Richland Office has requested WSRC to supply PNNL with a Pinellas U-bed loaded with tritium for permeation experiments. It is desired to have less than 1000 Ci tritium in the bed to allow shipping without excessive packaging requirements. Pinellas U-Bed No. 874 was loaded with approximately 955 Ci of 98 percent purity tritium on the ETM manifold in the Materials Test Facility in Building 232-H.
Date: September 15, 1999
Creator: Shanahan, K. L.
Partner: UNT Libraries Government Documents Department
open access

A limit on {sigma} {center_dot} BR (B{sub c}{sup {+-}} {yields} J/{psi} + {pi}{sup {+-}})/{sigma} {center_dot} BR(B{sub u}{sup {+-}} {yields} J/{psi} + K{sup {+-}}) in {radical}s = 1.8 TeV proton-antiproton collisions

Description: We report on the results of a search for the B{sub c} (b{bar c}) meson in the decay B{sub c}{sup +-} {yields} J/{psi} + {pi}{sup +-}. This search is guided by a control sample of decays of B{sub u} mesons to J/{psi} + K and uses {approx_equal} 75pb{sup -1} of data collected at the Collider Detector Facility (CDF) at Fermilab. The lifetime of the B{sub c} meson is unknown, so the 95% confidence level limit on {sigma} {center_dot} BR(B{sub c} {yields} {psi} + {pi})/{sigma} {center_dot} BR(B{sub u… more
Date: July 15, 1995
Creator: Abe, F.
Partner: UNT Libraries Government Documents Department
open access

Precise tests of x-ray scattering theories in the Compton regime.

Description: The authors report two experiments intended to test the accuracy of state-of-the-art theoretical predictions for x-ray scattering from low-Z atoms. The first one deals with the differential x-ray scattering cross sections in Ne and He from 11-22 keV and the Ne Compton-to-Rayleigh scattering ratio in this energy range. It was found that, in order to be consistent with the experimental results, an accurate description at low Z must include nonlocal exchange, electron correlation, and dynamic effe… more
Date: January 15, 1999
Creator: Dunford, R. W.; Gemmell, D. S.; Kanter, E. P.; Krassig, B.; Southworth, S. H. & Young, L.
Partner: UNT Libraries Government Documents Department
open access

Evaluation and Demonstration of the BNFL Ionsens

Description: This report describes the technology, system, and process that has been developed and tested. It also discusses the technology''s advantages, disadvantages, system performance, and its effectiveness. A comparison to the baseline technologies as well as other competing technologies will be presented. This report will include a brief discussion of commercial availability and technology readiness for implementation and recommendations for its use.
Date: October 15, 1999
Creator: Salaymeh, S.R.
Partner: UNT Libraries Government Documents Department
open access

Weak matrix elements in the large N{sub c} limit

Description: The matrix elements of the four quark operators needed to predict many weak interaction processes can be evaluated using the large N{sub c} limit of quantum chromodynamics. At leading order in the large N{sub c} expansion, the weak matrix elements of four quark operators factorize into independent matrix elements of two quark operators, a common approximation being used today. At the next leading order, the weak matrix elements acquire the leading scale and scheme dependence expected for these … more
Date: October 15, 1999
Creator: Bardeen, William A.
Partner: UNT Libraries Government Documents Department
open access

Salary Information for Nuclear Engineers and Health Physicists, October 1995

Description: Salary information was collected for October 1995 for personnel working as nuclear engineers and health physicists. The salary information includes personnel at the B.S., M.S., and Ph.D. levels with zero, one, and three years of professional work experience. Information is provided for utilities and non-utilities. Non-utilities include private sector organizations and U.S. Department of Energy contractor-operated facilities. Government agencies, the military, academic organizations, and medical… more
Date: October 15, 1995
Creator: Oak Ridge Institute for Science and Education
Partner: UNT Libraries Government Documents Department
open access

A Hybrid Hydrologic-Geophysical Inverse Technique for the Assessment and Monitoring of Leachates in the Vadose Zone

Description: The objective of this study is to develop and field test a new, integrated Hybrid Hydrologic-Geophysical Inverse Technique (HHGIT) for characterization of the vadose zone at contaminated sites. This new approach to site characterization and monitoring can provide detailed maps of hydrogeological heterogeneity and the extent of contamination by combining information from 3D electric resistivity tomography (ERT) and/or 2D cross borehole ground penetrating radar (XBGPR) surveys, statistical inform… more
Date: June 15, 1999
Creator: Alumbaugh, David L.; Yeh, Jim; Labrecque, Doug; Glass, Robert J.; Brainard, James & Rautman, Chris
Partner: UNT Libraries Government Documents Department
open access

Salary Information for Nuclear Engineers and Health Physicists, July 1996

Description: Salary information was collected for July 1996 for personnel working as nuclear engineers and health physicists. The salary information includes personnel at the B.S., M.S., and Ph.D. levels with zero, one, three, four to seven, and eight to ten years of professional work experience. Information is provided for utilities and non-utilities. Non-utilities include private sector organizations and U.S. Department of Energy contractor-operated facilities. Government agencies, the military, academic … more
Date: July 15, 1996
Creator: Oak Ridge Institute for Science and Education
Partner: UNT Libraries Government Documents Department
open access

Early Inflation and Cosmology in Theories with Sub-Millimeter Dimensions

Description: We discuss early cosmology in theories where the fundamental Planck mass is close to the TeV scale. In such theories the standard model fields are localized to a (3 + 1)-dimensional wall with n new transverse sub-millimeter sized spatial dimensions. The topics touched upon include: early inflation that occurs while the size of the new dimensions are still small, the spectrum and magnitude of density perturbations, the post-inflation era of contraction of our world while the internal dimensions … more
Date: March 15, 1999
Creator: Arkani-Hamed, Nima
Partner: UNT Libraries Government Documents Department
open access

Evaluation of H2 Getter Materials for Use in the TRUPACT-II

Description: Savannah River Site (SRS) has many waste drums containing Pu-238 that exceed the currently allowed wattage for transportation in the Transuranic Package Transporter-II (TRUPACT-II). By eliminating layers of confinement in waste drums and using getters to remove hydrogen gas, the TRUPACT-II waste loading can be increased significantly, with the potential of reaching the package''s 40-watt thermal limit. The cost savings associated with increasing the waste loading are enormous, and can be measur… more
Date: November 15, 1999
Creator: Livingston, R. R.
Partner: UNT Libraries Government Documents Department
open access

An Overview of Surface Finishes and Their Role in Printed Circuit Board Solderability and Solder Joint Performance

Description: A overview has been presented on the topic of alternative surface finishes for package I/Os and circuit board features. Aspects of processability and solder joint reliability were described for the following coatings: baseline hot-dipped, plated, and plated-and-fused 100Sn and Sn-Pb coatings; Ni/Au; Pd, Ni/Pd, and Ni/Pd/Au finishes; and the recently marketed immersion Ag coatings. The Ni/Au coatings appear to provide the all-around best option in terms of solderability protection and wire bonda… more
Date: October 15, 1998
Creator: Vianco, P. T.
Partner: UNT Libraries Government Documents Department
open access

Tank characterization report for single-shell tank 241-S-104

Description: One of the major functions of the Tank Waste Remediation System (TWRS) is to characterize wastes in support of waste management and disposal activities at the Hanford Site. Analytical data from sampling and analysis, along with other available information about a tank, are compiled and maintained in a tank characterization report (TCR). This report and its appendixes serve as the TCR for single-shell tank 241-S-104. The objectives of this report are: (1) to use characterization data in response… more
Date: April 15, 1997
Creator: Jo, J.
Partner: UNT Libraries Government Documents Department
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