States

Megachannel. gamma. --. gamma. coincidence system using a PDP-8/E computer and moving-head disks (open access)

Megachannel. gamma. --. gamma. coincidence system using a PDP-8/E computer and moving-head disks

A megachannel pulse-height analysis system using a PDP-8/E computer and two moving-head disk memories has been developed. The system has a storage capacity of 220 memory locations, is capable of processing 1100 events/s, and provides on-line sorting and disk storage. An X- or Y-pulse-height spectrum in coincidence with one or several arbitrary pulse-height windows can be assembled in core for scope display and spectral analysis within 2 to 20 seconds. Reconstruction of a complete X- or Y-pulse-height spectrum requires about 3 minutes.
Date: October 19, 1976
Creator: Ruhter, W. D.; Camp, D. C.; Mann, L. G.; Niday, J. B. & Siemens, P. D.
Object Type: Article
System: The UNT Digital Library
Imperial Valley Environmental Project: progress report (open access)

Imperial Valley Environmental Project: progress report

Progress is reported in six areas of research: air quality, water quality, ecosystem quality, subsidence and seismicity, socioeconomic effects, and integrated assessment. A major goal of the air quality element is to evaluate the rate of emission of H/sub 2/S, CO/sub 2/, H/sub 2/, N/sub 2/, CH/sub 4/, and C/sub 2/H/sub 6/ from the operation of the geothermal loop experimental facility at Niland. Concentrations of H/sub 2/S were found to vary between 1500 to 4900 ppM by volume at the Niland facility. To distinguish between geothermal fluids and other waters, extensive sampling networks were established. A major accomplishment was the installation of a high-resolution subsidence-detection network in the Salton Sea geothermal field area, centered on the test facility at Niland. A major effort went into establishing a background of data needed for subsequent impact assessments related to socioeconomic issues raised by geothermal developments. Underway are a set of geothermal energy scenarios that include power development schedules, technology characterizations, and considerations of power-plant-siting criteria. A Gaussian air-pollution model was modified for use in preliminary air-quality assessments. A crop-growth model was developed to evaluate impacts of gases released from geothermal operations on various agricultural crops. Work is also reported on the legal …
Date: October 19, 1977
Creator: Phelps, Paul L. & Anspaugh, Lynn R.
Object Type: Report
System: The UNT Digital Library
Mass spectrometric analytical services and research activities to support coal-liquid characterization research. Quarterly report, June 9, 1976--October 5, 1976. [10 refs] (open access)

Mass spectrometric analytical services and research activities to support coal-liquid characterization research. Quarterly report, June 9, 1976--October 5, 1976. [10 refs]

Low-resolution field ionization and high-resolution 70-eV electron-impact mass spectra data were obtained for 28 GPC fractions acquired from Bartlett, Kansas, heavy petroleum by members of the Separation and Characterization group at the Bartlesville Energy Research Center. This group was supplied with most-probable empirical formulas deduced from the high resolution electron-impact data. Analysis of the qualitative and quantitative analytical data previously obtained for GPC fractions from a Synthoil sample by high- and low-resolution field-ionization and high-resolution 70-eV electron-impact mass spectrometry is essentially complete. A study of field-ionization sensitivities for saturates and mixtures of saturates and aromatics is in progress. Components required to modify the combined FI/EI ion source to permit operation in the field desorption mode have been ordered.
Date: October 19, 1976
Creator: Scheppele, S. E.
Object Type: Report
System: The UNT Digital Library
A Dynamically Adaptive Arbitrary Lagrangian-Eulerian Method for Hydrodynamics (open access)

A Dynamically Adaptive Arbitrary Lagrangian-Eulerian Method for Hydrodynamics

A new method that combines staggered grid Arbitrary Lagrangian-Eulerian (ALE) techniques with structured local adaptive mesh refinement (AMR) has been developed for solution of the Euler equations. The novel components of the combined ALE-AMR method hinge upon the integration of traditional AMR techniques with both staggered grid Lagrangian operators as well as elliptic relaxation operators on moving, deforming mesh hierarchies. Numerical examples demonstrate the utility of the method in performing detailed three-dimensional shock-driven instability calculations.
Date: October 19, 2002
Creator: Anderson, R W; Pember, R B & Elliott, N S
Object Type: Article
System: The UNT Digital Library
The raw disk i/o performance of compaq storage works RAID arrays under tru64 unix (open access)

The raw disk i/o performance of compaq storage works RAID arrays under tru64 unix

We report on the raw disk i/o performance of a set of Compaq StorageWorks RAID arrays connected to our cluster of Compaq ES40 computers via Fibre Channel. The best cumulative peak sustained data rate is l17MB/s per node for reads and 77MB/s per node for writes. This value occurs for a configuration in which a node has two Fibre Channel interfaces to a switch, which in turn has two connections to each of two Compaq StorageWorks RAID arrays. Each RAID array has two HSG80 RAID controllers controlling (together) two 5+p RAID chains. A 10% more space efficient arrangement using a single 1l+p RAID chain in place of the two 5+P chains is 25% slower for reads and 40% slower for writes.
Date: October 19, 2000
Creator: Uselton, A C
Object Type: Report
System: The UNT Digital Library
A study of transient particle coarsening (open access)

A study of transient particle coarsening

Efforts were concentrated on numerically modeling the time-dependent particle coarsening (Ostwald ripening) process. Four models were included: Lifshsitz-Slyozov-Wagner, Brailsford and Wynblatt, Marqusee and Ross, and Marder. The simulations monitored the particle size distribution (PSD) as a function of time; initial PSDs were derived from classical nucleation theory. The ripening kinetics can be represented as a plot of the second moment of normalized PSD vs time. A geometric correction factor is discussed. Future research is planned on Al-Li.
Date: October 19, 1992
Creator: Hoyt, J. J.
Object Type: Report
System: The UNT Digital Library
National Ignition Facility (NIF) Control Network Design and Analysis (open access)

National Ignition Facility (NIF) Control Network Design and Analysis

The control network for the National Ignition Facility (NIF) is designed to meet the needs for common object request broker architecture (CORBA) inter-process communication, multicast video transport, device triggering, and general TCP/IP communication within the NIF facility. The network will interconnect approximately 650 systems, including the embedded controllers, front-end processors (FEPs), supervisory systems, and centralized servers involved in operation of the NIF. All systems are networked with Ethernet to serve the majority of communication needs, and asynchronous transfer mode (ATM) is used to transport multicast video and synchronization triggers. CORBA software infra-structure provides location-independent communication services over TCP/IP between the application processes in the 15 supervisory and 300 FEP systems. Video images sampled from 500 video cameras at a 10-Hz frame rate will be multicast using direct ATM Application Programming Interface (API) communication from video FEPs to any selected operator console. The Ethernet and ATM control networks are used to broadcast two types of device triggers for last-second functions in a large number of FEPs, thus eliminating the need for a separate infrastructure for these functions. Analysis, design, modeling, and testing of the NIF network has been performed to provide confidence that the network design will meet NIF control requirements.
Date: October 19, 2001
Creator: Bryant, R M; Carey, R W; Claybourn, R V; Pavel, G & Schaefer, W J
Object Type: Article
System: The UNT Digital Library
Chamber-transport simulation results for heavy-ion fusion drivers (open access)

Chamber-transport simulation results for heavy-ion fusion drivers

The heavy-ion fusion (HIF) community recently developed a power-plant design that meets the various requirements of accelerators, final focus, chamber transport, and targets. The point design is intended to minimize physics risk and is certainly not optimal for the cost of electricity. Recent chamber-transport simulations, however, indicate that changes in the beam ion species, the convergence angle, and the emittance might allow more-economical designs.
Date: October 19, 2004
Creator: Sharp, W. M.; Callahan, D. A.; Tabak, M.; Yu, S. S.; Peterson, P. F.; Rose, D. V. et al.
Object Type: Article
System: The UNT Digital Library
History of the APS Topical Group on Shock Compression of Condensed Matter (open access)

History of the APS Topical Group on Shock Compression of Condensed Matter

In order to provide broader scientific recognition and to advance the science of shock compressed condensed matter, a group of American Physical Society (APS) members worked within the Society to make this field an active part of the APS. Individual papers were presented at APS meetings starting in the 1940's and shock wave sessions were organized starting with the 1967 Pasadena meeting. Shock wave topical conferences began in 1979 in Pullman, WA. Signatures were obtained on a petition in 1984 from a balanced cross-section of the shock wave community to form an APS Topical Group (TG). The APS Council officially accepted the formation of the Shock Compression of Condensed Matter (SCCM) TG at its October 1984 meeting. This action firmly aligned the shock wave field with a major physical science organization. Most early topical conferences were sanctioned by the APS while those held after 1992 were official APS meetings. The topical group organizes a shock wave topical conference in odd numbered years while participating in shock wavehigh pressure sessions at APS general meetings in even numbered years.
Date: October 19, 2001
Creator: Forbes, J W
Object Type: Article
System: The UNT Digital Library
Modulation of calcium oxalate monohydrate crystallization by citrate through selective binding to atomic steps (open access)

Modulation of calcium oxalate monohydrate crystallization by citrate through selective binding to atomic steps

The majority of human kidney stones are composed primarily of calcium oxalate monohydrate (COM) crystals. Thus, determining the molecular mechanisms by which urinary constituents modulate calcium oxalate crystallization is crucial for understanding and controlling urolithiassis in humans. A comprehensive molecular-scale view of COM shape modification by citrate, a common urinary constituent, obtained through a combination of in situ atomic force microscopy (AFM) and molecular modeling is now presented. We show that citrate strongly influences the growth morphology and kinetics on the (-101) face but has much lower effect on the (010) face. Moreover, binding energy calculations show that the strength of the citrate-COM interaction is much greater at steps than on terraces and is highly step-specific. The maximum binding energy, -166.5 kJ {center_dot} mol{sup -1}, occurs for the [101] step on the (-101) face. In contrast, the value is only -56.9 kJ {center_dot} mol-1 for the [012] step on the (010) face. The binding energies on the (-101) and (010) terraces are also much smaller, -65.4 and -48.9 kJ {center_dot} mol{sup -1} respectively. All other binding energies lie between these extremes. This high selectivity leads to preferential binding of citrate to the acute [101] atomic steps on the (-101) face. …
Date: October 19, 2004
Creator: Qiu, S. R.; Wierzbicki, A.; Salter, E. A.; Zepeda, S.; Orme, C. A.; Hoyer, J. R. et al.
Object Type: Article
System: The UNT Digital Library
Characterization of Stainless Steel and Refractory Metal Welds Made using a Diode-Pumped, Continuous Wave Nd: Yag Laser (open access)

Characterization of Stainless Steel and Refractory Metal Welds Made using a Diode-Pumped, Continuous Wave Nd: Yag Laser

A series of laser welds have been made on several materials using a Rofin-Sinar DY-033, 3.3 kW, Diode-Pumped Continuous Wave (CW) Nd:YAG laser system, located at Los Alamos National Laboratory. Materials welded in these experiments include 21-6-9 stainless steel, 304L stainless steel, vanadium, and tantalum. The effects of changes in the power input at a constant travel speed on the depth, width, aspect ratio, and total melted area of the welds have been analyzed. Increases in the measured weld pool dimensions as a function of power input are compared for each of the base metals investigated. These results provide a basis for further examining the characteristics of diode pumped CW Nd:YAG laser systems in welding applications.
Date: October 19, 2001
Creator: Palmer, T. A.; Wood, B.; Elmer, J. W.; Westrich, C.; Milewski, J. O.; Piltch, M. et al.
Object Type: Report
System: The UNT Digital Library
Far SOL Transport and Main Wall Plasma Interaction in DIII-D (open access)

Far SOL Transport and Main Wall Plasma Interaction in DIII-D

Far scrape-off layer (SOL) and near-wall plasma parameters in DIII-D depend strongly on the discharge parameters and confinement regime. In L-mode discharges cross-field transport increases with the average discharge density and flattens far SOL profiles, thus increasing plasma-wall contact. In H-mode between edge localized modes (ELMs), plasma-wall contact is generally weaker than in L-mode. During ELMs plasma fluxes to the wall increase to, or above the L-mode levels. Depending on the discharge conditions ELMs are responsible for 30-90% of the ion flux to the outboard chamber wall. Cross-field fluxes in far SOL are dominated by large amplitude intermittent transport events that may propagate all the way to the outer wall and cause sputtering. A Divertor Material Evaluation System (DiMES) probe containing samples of several ITER-relevant materials including carbon, beryllium and tungsten was exposed to a series of upper single null (USN) discharges as a proxy to measure the first wall erosion.
Date: October 19, 2004
Creator: Rudakov, D. L.; Boedo, J. A.; Moyer, R. A.; Stangeby, P. C.; Watkins, J. G.; Whyte, D. G. et al.
Object Type: Article
System: The UNT Digital Library
Babel 1.0 Release Criteria: A Working Document (open access)

Babel 1.0 Release Criteria: A Working Document

In keeping with the Open Source tradition, we want our Babel 1.0 release to indicate a certain level of capability, maturity, and stability. From our first release (version 0.5.0) in July of 2001 to our current (18th) release (version 0.9.6) we have continued to add capabilities in response to customer feedback, our observations in the field, and a consistent vision for interoperability. The key to our maturity is without a doubt the ever-increasing demands of our growing user base... both in terms of sheer size and sophistication with the underlying technology. Stability is a special challenge for any research project. With our 1.0 release, we will branch and maintain a stable Babel 1.0 code line for at least a full year. This means no new features and no backward incompatible changes, only bug fixes. All continuing R&D will be performed on a separate development tree. Currently, Babel has a quarterly release cycle with no guarantee for backward compatibility from one release to the next (though we certainly try to make migration as painless as possible). Now is the time where we can see a good point for a Babel 1.0 release. But, seeing that point is different from being there. …
Date: October 19, 2004
Creator: Kumfert, Gary; Dahlgren, Tamara; Epperly, Thomas & Leek, James
Object Type: Report
System: The UNT Digital Library
Structural analysis and evaluation of the 241SY101 tank annulus heat-up (open access)

Structural analysis and evaluation of the 241SY101 tank annulus heat-up

This document provides the structural analysis (static and thermal loads) of the 241SY101 tank to determine the maximum allowable temperature and rate of heating that could be applied to tank 241SY101 through annulus air heating without detrimental effects to the structural integrity of the concrete and steel liner of the tank.
Date: October 19, 1994
Creator: Ziada, H. H.
Object Type: Report
System: The UNT Digital Library
M.A. Streicher findings regarding high-level waste tank corrosion issues (open access)

M.A. Streicher findings regarding high-level waste tank corrosion issues

None
Date: October 19, 1994
Creator: Husa, E. I.
Object Type: Report
System: The UNT Digital Library
Processing E-metal in the 200 Areas (open access)

Processing E-metal in the 200 Areas

This report discusses current plans of the Irradiation Processing Department which call for the inauguration of an E-metal (0.94% U-235) replacement program for the C-metal columns now in reactor use. Other reactor planning is considering the use of E-metal for E-N (lithium) nd E-Co (cobalt) loadings, compensation for reactor biological shields, and for the improved production reactor (IPR). Activation of any of these plans will be dependent on results of the test programs and A.E.C. policy decisions. The quantity of E-metal that might require separation processing is estimated and an economic analysis is provided
Date: October 19, 1956
Creator: Platt, A. M. & Tomlinson, R. E.
Object Type: Report
System: The UNT Digital Library
Void fraction instrument acceptance test procedure (open access)

Void fraction instrument acceptance test procedure

None
Date: October 19, 1994
Creator: Stokes, T. I. & Pearce, K. L.
Object Type: Report
System: The UNT Digital Library
Automated Transportation Management System (ATMS) user`s manual. Revision 1 (open access)

Automated Transportation Management System (ATMS) user`s manual. Revision 1

The Automated Transportation Management System (ATMS) Software User Guide (SUG) constitutes the user procedures for the ATMS System. Information in this document will be used by the user to operate the automated system. It is intended to be used as a reference manual to guide and direct the user(s) through the ATMS software product and its environment. The objectives of ATMS are as follows: to better support the Procurement function with freight rate information; to free Transportation Logistics personnel from routine activities such as the auditing and input of freight billing information; to comply with Headquarters Department of Energy-Inspector General (DOE-IG) audit findings to automate transportation management functions; to reduce the keying of data into the Shipment Mobility Accountability Collection (SMAC) database; and to provide automation for the preparing of Bill of Lading, Declaration of Dangerous Goods, Emergency Response Guide and shipping Labels using HM181 Retrieval of hazardous material table text information.
Date: October 19, 1994
Creator: Smith, P. D.
Object Type: Report
System: The UNT Digital Library
Accurate solution algorithms for incompressible multiphase flows (open access)

Accurate solution algorithms for incompressible multiphase flows

A number of advances in modeling multiphase incompressible flow are described. These advances include high-order Godunov projection methods, piecewise linear interface reconstruction and tracking and the continuum surface force model. Examples are given.
Date: October 19, 1994
Creator: Rider, W. J.; Kothe, D. B.; Mosso, S. J.; Cerutti, J. H. & Hochstein, J. I.
Object Type: Article
System: The UNT Digital Library
New inlet nozzle assembly: C Reactor (open access)

New inlet nozzle assembly: C Reactor

The use of self-supported fuel elements in ribless Zircaloy-2 tubes at C-Reactor requires some inlet nozzle modification to allow charging of the larger overall diameter fuel pieces. A new nozzle assembly has been developed (by Equipment Development Operation -- IPD) which will allow use of the new fuel pieces and at the same time increase the reliability of the header-to-tube piping and reduce pumping power losses. Flow test data were requested for the new assembly and the results of these tests are presented herein. This report also presents a comparison of the header to tube energy losses for the various reactor inlet nozzle assemblies which are currently used on the Hanford production reactors.
Date: October 19, 1960
Creator: Calkin, J. F.
Object Type: Report
System: The UNT Digital Library
Drilling of 107-F Test Well (open access)

Drilling of 107-F Test Well

None
Date: October 19, 1948
Creator: Brown, R. E.
Object Type: Report
System: The UNT Digital Library
Post irradiation examination of KER-1-3 seven rod cluster fuel elements (RM-277) (open access)

Post irradiation examination of KER-1-3 seven rod cluster fuel elements (RM-277)

Two coextruded, Zr-2 clad, natural uranium, seven rod cluster fuel elements were irradiated to a calculated exposure of 1250 MWD/T in the KER Facility and discharged 1-16-59. The fuel elements were NPR candidate fuel and examination was requested to determine the behavior of coextruded, Zr-2 clad, natural uranium irradiated at core temperatures of approximtely 425{degree}C. The elements were transferred to the Radiometallurgy Laboratory 2-25-59. The elements demonstrated excellent in reactor performance with no significant changes in either the fuel or the hardware. Detailed examination of the central rod and two peripheral rods from one of the clusters showed no microcracks in the uranium. Moderate growth was observed in the fuel at the unrestricted rod ends.
Date: October 19, 1959
Creator: Gruber, W. J.
Object Type: Report
System: The UNT Digital Library
NPR pile gas purification (open access)

NPR pile gas purification

None
Date: October 19, 1961
Creator: Stepnewski, D. D.
Object Type: Report
System: The UNT Digital Library
Supplement C to Production Test IP-250-A, Irradiation of Zircaloy-2 jacketed tube and tube elements in the KER loop (open access)

Supplement C to Production Test IP-250-A, Irradiation of Zircaloy-2 jacketed tube and tube elements in the KER loop

The objective of this Supplement described in this report to Pt-IP-250-A is to d enriched tube-and-tube elements will develop pitting corrosion on the Zircaloy-2 jackets when irradiated in pH 10 water. The measurement of dimensional changes in the fuel elements and the observation of the effect of irradiation on the uranium and bond area are also objectives of the test, but secondary in importance to identifying a pitting corrosion problem in NPR quality water, if one exists.
Date: October 19, 1959
Creator: Kratzer, W. K.
Object Type: Report
System: The UNT Digital Library