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Fiscal Year 2002
3
Winter Fuels Report
2
ARM Facilities Newsletter
1
Ames Laboratory Reports
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Bench-Scale Co-Processing Quarterly Report
1
Carbon Sequestration on Surface Mine Lands Quarterly Report
1
Direct FuelCell/Turbine Power Plant Annual Report
1
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1
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1
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3,257 Matching Results
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The {pi}{sup +} Decay of Light Hypernuclei
The observed {pi}{sup +} emission from the weak decay of the {sup 4}{sub {Lambda}}He hypernucleus has been an intriguing puzzle for more than 30 years, because the Lambda decays in free space only by emission of a {pi}{sup {minus}} or a {pi}{sup 0}. We re-examine this puzzling weak decay with our focus upon a decay mechanism involving the {Sigma}{sup +}N {r_arrow} {pi}{sup +}nN decay of a virtual {Sigma}{sup +}, stemming from {Lambda}N to {Sigma}N conversion (mixing) within the hypernucleus. We emphasize the observed energy distribution of the observed {pi}{sup +}s compared to that of {pi}{sup -}s in standard mesonic decay as well as the isotropic angular distribution of the {pi} {sup +}s. Competing suggestions to explain the positive pion weak decay have been offered. A possible search for {pi}{sup +} decay from the other {Lambda} hypernuclei is explored as means to test our hypothesis.
Date:
February 19, 1999
Creator:
Gibson, B. F.
Object Type:
Article
System:
The UNT Digital Library
Buildings for the 21st Century Newsletter, Fall 2000
This issue of Buildings for the 21st Century, a quarterly newsletter on the DOE building programs and technology, highlights the new high-performance visitor center at Zion National Park, Maryland's new Clean Energy Incentive Act, the Ohio State Weatherization Program, the Rebuild America Program and Native American communities joining forces, and Energy Star{reg_sign} clothes washers.
Date:
October 19, 2000
Creator:
Tromly, K.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
Bioethanol Fuel Production Concept Study: Topline Report
The DOE is in the process of developing technologies for converting plant matter other than feed stock, e.g., corn stover, into biofuels. The goal of this research project was to determine what the farming community thinks of ethanol as a fuel source, and specifically what they think of bioethanol produced from corn stover. This project also assessed the image of the DOE and the biofuels program and determined the perceived barriers to ethanol-from-stover production.
Date:
November 19, 2001
Creator:
Marketing Horizons, Inc.
Object Type:
Report
System:
The UNT Digital Library
Production and Testing of the VITAMIN-B6 Fine Group and the BUGLE-93 Broad-Group Neutron/Photon Cross-Section Libraries Derived from ENDF/B-VI Nuclear Data
A revised multigroup cross-section library based on Release 3 of ENDF/B-VI data has been produced and tested for light-water-reactor shielding and reactor pressure vessel dosimetry applications. This new broad-group library, which is designated BUGLE-96, represents an improvement over the BUGLE-93 data library released in February 1994 and replaces the data package for BUGLE-93 in the Radiation Safety Information Computational Center (formerly RSIC). The processing methodology is the same as that used for producing BUGLE-93 and is consistent with ANSI/ANS 6.1.2. The ENDF data were first processed into a fine-group, pseudo-problem-independent format and then collapsed into the final broad-group format. The fine-group library, which is designated VITAMIN-B6, contains 120 nuclides. The BUGLE-96 47-neutron-group/20-gamma-ray-group library contains the same 120 nuclides processed as infinitely dilute and collapsed using a weighting spectrum typical of a concrete shield. Additionally, nuclides processed with resonance self-shielding and weighted using spectra specific to BWR and PWR material compositions and reactor models are available. As an added feature of BUGLE-96, cross-section sets having upscatter data for four thermal neutron groups are included. The upscattering data should improve the application of BUGLE-96 to the calculation of more accurate thermal fluences, although more computer time will be required. Several new dosimetry …
Date:
April 19, 2001
Creator:
White, J. E.
Object Type:
Report
System:
The UNT Digital Library
Determination of worst case projected source term in tank 241-SY-102
This document describes the methodology used to determine the worst case projected source term that could be in double-shell tank 241-SY-102 for the cross-site waste transfer to tank 241-AP-107. The worst case projected source term given in Table 4-1 is the weighted average of the tank waste sources with the addition of sufficient waste from a defined worst source tank to fill the tank to 416 inches. The projected source term in this document is not intended to represent what will be in tank 241-SY-102. Rather, it is a conservative bounding composition considering that the volume of waste that will be added from each current source is unknown.
Date:
May 19, 1999
Creator:
FOWLER, K.D.
Object Type:
Report
System:
The UNT Digital Library
Development of a detector for bunch by bunch measurement and optimization of luminosity in the LHC
The front IR quadrupole absorbers (TAS) and the IR neutral particle absorbers (TAN) in the high luminosity insertions of the LHC each absorb approximately 1.8TeV of forward collision products on average per pp interaction ({approximately}235W at design luminosity 1034cm-2s-1). This secondary particle flux can be exploited to provide a useful storage ring operations tool for optimization of luminosity. Novel segmented, multi-gap, pressurized gas ionization chambers are proposed for sampling the energy deposited near the maxima of the hadronic/ electromagnetic showers in these absorbers. The system design choices have been strongly influenced by optimization of signal to noise ratio and by the very high radiation environment. The ionization chambers are instrumented with state of the art low noise, fast, pulse shaping electronics capable of resolving individual bunch crossings at 40 MHz. Data on each bunch are separately accumulated over multiple bunch crossings until the desired statistical accuracy is obtained. At design luminosity approximately 2x103 bunch crossings suffice for a 1% luminosity measurement.
Date:
May 19, 2000
Creator:
Turner, W. C.; Burks, M. T.; Datte, P. S.; Manfredi, P. F.; Millaud, J. E.; Mokhov, N. V. et al.
Object Type:
Article
System:
The UNT Digital Library
Magnetized Target Fusion. A Proof-of-Principle Research Proposal
None
Date:
May 19, 1998
Creator:
Schoenberg, K.F. & Siemon, R.E.
Object Type:
Report
System:
The UNT Digital Library
Roof Integrated Solar Absorbers: The Measured Performance of ''Invisible'' Solar Collectors: Preprint
The Florida Solar Energy Center (FSEC), with the support of the National Renewable Energy Laboratory, has investigated the thermal performance of solar absorbers that are an integral, yet indistinguishable, part of a building's roof. The first roof-integrated solar absorber (RISA) system was retrofitted into FSEC's Flexible Roof Facility in Cocoa, Florida, in September 1998. This ''proof-of-concept'' system uses the asphalt shingle roof surface and the plywood decking under the shingles as an unglazed solar absorber. Data was gathered for a one-year period on the system performance. In Phase 2, two more RISA prototypes were constructed and submitted for testing. The first used the asphalt shingles on the roof surface with the tubing mounted on the underside of the plywood decking. The second prototype used metal roofing panels over a plywood substrate and placed the polymer tubing between the plywood decking and the metal roofing. This paper takes a first look at the thermal performance results for the ''invisible'' solar absorbers that use the actual roof surface of a building for solar heat collection.
Date:
October 19, 2001
Creator:
Colon, C. J. (Florida Solar Energy Center) & Merrigan, T. (National Renewable Energy Laboratory)
Object Type:
Article
System:
The UNT Digital Library
QCD Results from the CDF Experiment at squareroot s = 1.96 TeV
First QCD results obtained from the CDF experiment using Run II data are reported. The Run II physics program at the Tevatron started in the spring of 2001, with protons and anti-protons colliding at an energy of {radical}s = 1.96 TeV. The size of the data sample already compares to that of Run I. Results presented here include the measurement of the inclusive jet cross section, a search for new particles decaying to dijets, and a study of diffractive dijet events.
Date:
May 19, 2003
Creator:
Gallinaro, Michele
Object Type:
Article
System:
The UNT Digital Library
Modeling of the Savannah River Site High Level Waste Evaporator Systems
Three evaporators are used to reduce the volume of waste in the waste tank farm at the Savannah River Site (SRS). Evaporators are crucial operation in the SRS waste processing and management system. Using the Aspen Custom Modeler(TM) (ACM) software package marketed by Aspen Technology, Inc., the evaporator dynamic flowsheet models have been constructed to simulate the behavior of the evaporator systems. The evaporator models are used to assist operations and planning. The models account for the basic arrangement and flowpath for the evaporators: (1) Feed system, (2) Concentrate system, (3) Overheads system, and (4) Steam system. This paper provides a detailed description of the model development and presents the result of a typical simulation scenario.
Date:
February 19, 2003
Creator:
Hang, T.
Object Type:
Article
System:
The UNT Digital Library
A user manual for GINGER and its post-processor XPLOTGIN
This is Version 1.3 of the manual for the free-electron laser simulation code GINGER and its post-processor.
Date:
February 19, 2002
Creator:
Fawley, William M.
Object Type:
Report
System:
The UNT Digital Library
The Effect of Ionizing Radiation U6+ Phases
None
Date:
October 19, 2005
Creator:
Utsunomiya, S. & Ewing, R. C.
Object Type:
Article
System:
The UNT Digital Library
System requirements for one-time-use ENRAF control panel software
An Enraf Densitometer is installed on tank 241-AY-102. The Densitometer will frequently be tasked to obtain and log density profiles. The activity can be effected a number of ways. Enraf Incorporated provides a software package called ''Logger18'' to its customers for the purpose of in-shop testing of their gauges. Logger18 is capable of accepting an input file which can direct the gauge to obtain a density profile for a given tank level and bottom limit. Logger18 is a complex, DOS based program which will require trained technicians and/or tank farm entries to obtain the data. ALARA considerations have prompted the development of a more user-friendly, computer-based interface to the Enraf densitometers. This document records the plan by which this new Enraf data acquisition software will be developed, reviewed, verified, and released. This plan applies to the development and implementation of a one-time-use software program, which will be called ''Enraf Control Panel.'' The software will be primarily used for remote operation of Enraf Densitometers for the purpose of obtaining and logging tank product density profiles.
Date:
August 19, 1999
Creator:
HUBER, J.H.
Object Type:
Report
System:
The UNT Digital Library
Scope of Work for Integration Management and Installation Services of the National Ignition Facility Beampath Infrastructure System
The goal of the National Ignition Facility (NIF) project is to provide an aboveground experimental capability for maintaining nuclear competence and weapons effects simulation and to provide a facility capable of achieving fusion ignition using solid-state lasers as the energy driver. The facility will incorporate 192 laser beams, which will be focused onto a small target located at the center of a spherical target chamber--the energy from the laser beams will be deposited in a few billionths of a second. The target will then implode, forcing atomic nuclei to sufficiently high temperatures and densities necessary to achieve a miniature fusion reaction. The NIF is under construction, at Livermore, California, located approximately 50 miles southeast of San Francisco, California.
Date:
March 19, 2000
Creator:
Coyle, P.D.
Object Type:
Report
System:
The UNT Digital Library
2.5 MHz feedforward beam loading compensation in the Fermilab Main Injector
There are five 2.5 MHz ferrite cavities (h = 28) in the Main Injector with an R/Q of 500 that are presently used for coalescing for the Tevatron. For use with the Fermilab Recycler, feedforward (FF) beam loading compensation (BLC) is required on these cavities because they will be required to operate at a net of 2 kV. Under current Recycler beam conditions, the beam-induced voltage is of this order. Recently a system using a digital bucket delay module operating at 53 MHz (h = 588) was used to produce a one-turn-delay feedforward signal. This signal was then combined with the low level RF signal to the 2.5 MHz cavities to cancel the beam induced voltage. During current operation they have shown consistently to operate with over a 20 dB reduction in beam loading.
Date:
May 19, 2003
Creator:
Dey, Joseph E.; Kourbanis, Ioanis & Steimel, James
Object Type:
Article
System:
The UNT Digital Library
Synchrotron based proton drivers
Proton drivers are the proton sources that produce intense short proton bunches. They have a wide range of applications. This paper discusses the proton drivers based on high-intensity proton synchrotrons. It gives a review of the high-intensity proton sources over the world and a brief report on recent developments in this field in the U.S. high-energy physics (HEP) community. The Fermilab Proton Driver is used as a case study for a number of challenging technical design issues.
Date:
September 19, 2002
Creator:
Chou, Weiren
Object Type:
Article
System:
The UNT Digital Library
Magnets for high intensity proton synchrotrons
Recently, there has been considerable interest at Fermilab for the Proton Driver, a future high intensity proton machine. Various scenarios are under consideration, including a superconducting linac. Each scenario present some special challenges. We describe here the magnets proposed in a recent study, the Proton Driver Study II, which assumes a conventional warm synchrotron, roughly of the size of the existing FNAL booster, but capable of delivering 380 kW at 8 GeV.
Date:
September 19, 2002
Creator:
Jean-Francois Ostiguy, Vladimir Kashikhine and Alexander Makarov
Object Type:
Article
System:
The UNT Digital Library
The Use of Tree Shelters in Restoring Forest Species to a Floodplain Delta: 5 Year Results
The use of tree shelters to enhance survival and growth of bald cypress, water tupelo, green ash, and black tupelo were evaluated in the riparian and swamp forest of the Pen Branch delta. Survival at the end of the five years ranged from 67% to 100% for seedlings in shelters and 2% to 90% for those in the open. Mortality resulted primarily from beavers. Height growth was only improved for seedlings in shelters for the first few years.
Date:
March 19, 1999
Creator:
Conner, W. H.; Inabinette, L. W. & Brantley, E. F.
Object Type:
Article
System:
The UNT Digital Library
Acceptance test procedure for the 105-KW isolation barrier leak rate
This acceptance test procedure shall be used to: First establish a basin water loss rate prior to installation of the two isolation barriers between the main basin and the discharge chute in K-Basin West. Second, perform an acceptance test to verify an acceptable leakage rate through the barrier seals. This Acceptance Test Procedure (ATP) has been prepared in accordance with CM-6-1 EP 4.2, Standard Engineering Practices.
Date:
May 19, 1995
Creator:
McCracken, K. J.
Object Type:
Report
System:
The UNT Digital Library
Hazard Evaluation for 244-CR Vault
This document presents the results of a hazards identification and evaluation performed on the 244-CR Vault to close a USQ (USQ No.TF-98-0785, Potential Inadequacy in Authorization Basis (PIAB): To Evaluate Miscellaneous Facilities Listed In HNF-2503 And Not Addressed In The TWRS Authorization Basis) that was generated as part of an evaluation of inactive TWRS facilities.
Date:
August 19, 1999
Creator:
Grams, W. H.
Object Type:
Report
System:
The UNT Digital Library
Applied and Environmental Microbiology Gordon Research Conference
The main objective of the Gordon Research Conference on Applied and Environmental Microbiology was to present and discuss new, fundamental research findings on microorganisms, their activities in the environment, their ecosystem-level effects, and their environmental or commercial applications. To accomplish this goal, knowledge of microbial diversity, interactions and population dynamics was required. The genomic basis of microbial processes, the cycling of naturally occurring and hazardous substances, and methodologies to assess the functional relationships of microorganisms in their habitats were essential for understanding the ecological consequences of microbial activities and the formulation of generalizing principles. In the last decade, molecular technology has revealed that microbial diversity is far more extensive than the limited view obtained from culturing procedures. Great advances in environmental microbiology have resulted from the development and application of molecular approaches to ecology and molecular evolution. A further surprise resulting from the application of these new tools is the blurring of the distinction between pathogenic traits versus those considered non-pathogenic. This year's conference addressed the issues of biodiversity, its development, and the impact of stress on gene selection and expression. In addition microbial metabolic versatility with toxins such as heavy metals, antibiotics, and organic pollutants were discussed. The nine …
Date:
November 19, 2003
Creator:
Wall, Judy D.
Object Type:
Article
System:
The UNT Digital Library
Physics Analysis of the FIRE Experiment
An integrated model of a complete discharge in the FIRE experiment has been developed based on the TSC simulation code. The complete simulation model includes a choice of several models for core transport, combined with an edge pedestal model and the Porcelli sawtooth model. Burn control is provided by feedback on the auxiliary heating power. We find that with the GLF23 and MMM95 transport models, Q >10 operation should be possible for H-mode pedestal temperatures in the range of 4-5 keV.
Date:
June 19, 2002
Creator:
Jardin, S. C.; Kessel, C. E.; Meade, D.; Breslau, J.; Fu, G.; Gorelenkov, N. et al.
Object Type:
Report
System:
The UNT Digital Library
Precipitation of Thorium Oxalate From Nitric Acid Solutions
Report documenting the results of experiments to test the solubility of thorium oxalate in nitric acid solutions and effect of excess oxalic acid. it includes graphed and tabular results: "Tabulation of Results of Oxalate Precipitations."
Date:
January 19, 1946
Creator:
Ayers, A. S.
Object Type:
Report
System:
The UNT Digital Library
High-performance computational and geostatistical experiments for testing the capabilities of 3-d electrical tomography
This project explores the feasibility of combining geologic insight, geostatistics, and high-performance computing to analyze the capabilities of 3-D electrical resistance tomography (ERT). Geostatistical methods are used to characterize the spatial variability of geologic facies that control sub-surface variability of permeability and electrical resistivity Synthetic ERT data sets are generated from geostatistical realizations of alluvial facies architecture. The synthetic data sets enable comparison of the �truth� to inversion results, quantification of the ability to detect particular facies at particular locations, and sensitivity studies on inversion parameters
Date:
January 19, 1999
Creator:
Carle, S. F.; Daily, W. D.; Newmark, R. L.; Ramirez, A. & Tompson, A.
Object Type:
Article
System:
The UNT Digital Library