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X-Ray Spectropolarimetry Studies at the Nevada Terawatt Facility and LLNL EBIT
Recent results from x-pinches at the NTF provide experimental evidence for the existence of strong electron beams in x-pinch plasmas and motivate the development of a new diagnostic, x-ray spectropolarimetry, for investigating the anisotropy of such plasmas. This diagnostic is based on theoretical modeling of polarization-dependent spectra measured simultaneously by spectrometers with different sensitivity to polarization. Results of the first polarization-sensitive experiments at the NTF are presented. K-shell emission from Ti x-pinches is recorded simultaneously by two identical spectrometers with the dispersion plane perpendicular and parallel to the discharge axis. The spectroscopic analysis of more than eight Ti x-pinch shots show how spectropolarimetry complements the usual diagnostics of a z-pinch plasma. The polarization-sensitive spectra, generated by a Maxwellian electron beam at LLNL EBIT have been collected and analyzed. These data make an important contribution to the plasma polarization spectroscopy program at the NTF. In particular, the study of multiply-charged Ti ion spectra help in the interpretation of the polarization-sensitive spectra from Ti x-pinches at the NTF.
Date:
October 20, 2001
Creator:
Shlyaptseva, A S; Kantsyrev, V L; Bauer, B S; Neill, P; Harris, C; Fedin, D A et al.
Object Type:
Article
System:
The UNT Digital Library
X-ray spectroscopy of ion-surface interactions using superconducting tunnel junctions
We have conducted low energy X-ray spectroscopy of ion/surface interactions with superconducting tunnel junction (STJ) detectors. The STJ detectors (Nb-Al-AlOx-Al-Nb) developed at the Lawrence Livermore National Laboratory have a high energy resolution and a high count-rate capability. The detectors are operated in an adiabatic demagnetization refrigerator with 60 mK base temperature at the end of a 40 cm long cold finger, which can be inserted into a UHV sample chamber connected to an ion source. We have studied the interaction of Ar{sup 9+}, O{sup 7+}, N{sup 6+} and C{sup 5+} with various targets (Au, SiH and SiO{sub 2}) at a kinetic energy of 10 keV/q. The resolution of 12-15 eV below 1 keV allows the different satellite lines emitted by these ions to be separated.
Date:
July 21, 2001
Creator:
Niedermayr, Thomas; Friedrich, Stephan; Cunningham, Mark F.; Frank, Matthias; Briand, Jean-Pierre & Labov, Simon E.
Object Type:
Article
System:
The UNT Digital Library
An XML-based protocol for distributed event services
A recent trend in distributed computing is the construction of high-performance distributed systems called computational grids. One difficulty we have encountered is that there is no standard format for the representation of performance information and no standard protocol for transmitting this information. This limits the types of performance analysis that can be undertaken in complex distributed systems. To address this problem, we present an XML-based protocol for transmitting performance events in distributed systems and evaluate the performance of this protocol.
Date:
June 25, 2001
Creator:
Gunter, Dan K.; Smith, Warren & Quesnel, Darcy
Object Type:
Article
System:
The UNT Digital Library
XML-BASED REPRESENTATION
For focused applications with limited user and use application communities, XML can be the right choice for representation. It is easy to use, maintain, and extend and enjoys wide support in commercial and research sectors. When the knowledge and information to be represented is object-based and use of that knowledge and information is a high priority, then XML-based representation should be considered. This paper discusses some of the issues involved in using XML-based representation and presents an example application that successfully uses an XML-based representation.
Date:
February 2001
Creator:
Kelsey, R.
Object Type:
Article
System:
The UNT Digital Library
Y-12 Groundwater Protection Program Calendar Year 2000 Groundwater Monitoring Data Evaluation Report for the Bear Creek Hydrogeologic Regime at the U.S. Department of Energy Y-12 National Security Complex, Oak Ridge, Tennessee
This report presents an evaluation of the groundwater and surface water monitoring data obtained during calendar year (CY) 2000 in the Bear Creek Hydrogeologic Regime (Bear Creek Regime). The Bear Creek Regime encompasses many confirmed and potential sources of groundwater and surface water contamination associated with the U.S. Department of Energy (DOE) Y-12 National Security Complex (hereafter referenced as Y-12) in Oak Ridge, Tennessee (Figure A.1). Prepared by the Y-12 Groundwater Protection Program (GWPP), this report addresses applicable provisions of DOE Order 5400.1 (General Environmental Protection Program) that require: (1) an evaluation of the quantity and quality of groundwater and surface water in areas that are, or could be, affected by Y-12 operations, (2) an evaluation of groundwater and surface water quality in areas where contaminants from Y-12 operations are most likely to migrate beyond the DOE Oak Ridge Reservation (ORR) property line, and (3) an evaluation of long-term trends in groundwater quality at Y-12. The following sections of this report contain relevant background information (Section 2.0); describe the results of the respective data evaluations required under DOE Order 5400.1 (Section 3.0); summarize significant findings of each evaluation (Section 4.0); and list the technical reports and regulatory documents cited for …
Date:
September 1, 2001
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Y-12 Groundwater Protection Program Calendar Year 2000 Groundwater Monitoring Data Evaluation Report for the Chestnut Ridge Hydrogeologic Regime at the U.S. Department of Energy Y-12 National Security Complex, Oak Ridge, Tennessee
This report presents an evaluation of the groundwater and surface water monitoring data obtained during calendar year (CY) 2000 from sampling locations in the Chestnut Ridge Hydrogeologic Regime (Chestnut Ridge Regime). The Chestnut Ridge Regime encompasses several hazardous and nonhazardous waste management facilities associated with the U.S. Department of Energy (DOE) Y-12 National Security Complex (hereafter referenced as Y-12) southeast of Oak Ridge, Tennessee (Figure A.1). Prepared by the Y-12 Groundwater Protection Program (GWPP), this monitoring data evaluation report addresses applicable provisions of DOE Order 5400.1 -- General Environmental Protection Program -- that require: (1) an evaluation of the quantity and quality of groundwater in areas that are, or could be, impacted by Y-12 operations, (2) an evaluation of the quality of surface water and groundwater where contaminants from Y-12 facilities are most likely to migrate beyond the DOE Oak Ridge Reservation (ORR) property line, and (3) an evaluation of long-term trends in groundwater quality at Y-12. The following sections of this report contain relevant background information (Section 2.0); describe the results of the respective data evaluations required under DOE Order 5400.1 (Section 3.0); summarize significant findings of each evaluation (Section 4.0); and list the technical reports and regulatory documents …
Date:
September 1, 2001
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Y-12 Groundwater Protection Program Groundwater and Surface Water Sampling and Analysis Plan For Calendar Year 2002.
This plan provides a description of the groundwater and surface water quality monitoring activities planned for calendar year (CY) 2002 at the U.S. Department of Energy (DOE) Y-12 National Security Complex that will be managed by the Y-12 Groundwater Protection Program (GWPP). Groundwater and surface water monitoring performed by the GWPP during CY 2002 will be in accordance with the following requirements of DOE Order 5400.1: to evaluate and maintain surveillance of existing and potential groundwater contamination sources; to provide for the early detection of groundwater contamination and determine the quality of groundwater and surface water where contaminants are most likely to migrate beyond the Oak Ridge Reservation property line; to identify and characterize long-term trends in groundwater quality at Y-12; and to provide data to support decisions concerning the management and protection of groundwater resources. Groundwater and surface water monitoring during CY 2002 will be performed in three hydrogeologic regimes at Y-12: the Bear Creek Hydrogeologic Regime (Bear Creek Regime), the Upper East Fork Poplar Creek Hydrogeologic Regime (East Fork Regime), and the Chestnut Ridge Hydrogeologic Regime (Chestnut Ridge Regime). The Bear Creek and East Fork regimes are located in Bear Creek Valley, and the Chestnut Ridge Regime is …
Date:
September 1, 2001
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Yakima River Species Interactions Studies, Annual Report 1999.
Species interactions research and monitoring was initiated in 1989 to investigate ecological interactions among fish in response to proposed supplementation of salmon and steelhead in the upper Yakima River basin. This is the eighth of a series of progress reports that address species interactions research and pre-supplementation monitoring of fishes in the Yakima River basin. Data have been collected prior to supplementation to characterize the ecology and demographics of non-target taxa (NTT) and target taxon, and develop methods to monitor interactions and supplementation success. Major topics of this report are associated with implementing NTT monitoring prescriptions for detecting potential impacts of hatchery supplementation, hatchery fish interactions, and monitoring fish predation indices. This report is organized into four chapters, with a general introduction preceding the first chapter. This annual report summarizes data collected primarily by the Washington Department of Fish and Wildlife (WDFW) between January 1, 1998 and December 31, 1999 in the Yakima basin, however these data were compared to data from previous years to identify preliminary trends and patterns.
Date:
June 2001
Creator:
Pearsons, Todd N.
Object Type:
Report
System:
The UNT Digital Library
Yakima River Species Interactions Studies, Annual Report 2000.
Species interactions research and monitoring was initiated in 1989 to investigate ecological interactions among fish in response to proposed supplementation of salmon and steelhead in the upper Yakima River basin. This is the ninth of a series of progress reports that address species interactions research and supplementation monitoring of fishes in the Yakima River basin. Data have been collected prior to supplementation to characterize the ecology and demographics of non-target taxa (NTT) and target taxon, and develop methods to monitor interactions and supplementation success. Major topics of this report are associated with the chronology of ecological interactions that occur throughout a supplementation program, implementing NTT monitoring prescriptions for detecting potential impacts of hatchery supplementation, hatchery fish interactions, and monitoring fish predation indices. This report is organized into four chapters, with a general introduction preceding the first chapter. This annual report summarizes data collected primarily by the Washington Department of Fish and Wildlife (WDFW) between January 1, 2000 and December 31, 2000 in the Yakima basin, however these data were compared to data from previous years to identify preliminary trends and patterns. Summaries of each of the chapters included in this report are described.
Date:
December 2001
Creator:
Pearsons, Todd N.
Object Type:
Report
System:
The UNT Digital Library
Year 4 Post-Remediation Biomonitoring of Pesticides and Other Contaminants in Marine Waters Near the United Heckathorn Superfund Site, Richmond, California
This report is fourth in a series of annual reports describing the results of biomonitoring following remediation of the United Heckathorn Superfund Site.
Date:
December 20, 2001
Creator:
Kohn, Nancy P. & Kropp, Roy
Object Type:
Report
System:
The UNT Digital Library
Year 4 Post-Remediation Biomonitoring of Pesticides and Other Contaminants in Marine Waters Near the United Heckathorn Superfund Site, Richmond, California
This report is fourth in a series of annual reports describing the results of biomonitoring following remediation of the United Heckathorn Superfund Site.
Date:
December 20, 2001
Creator:
Kohn, Nancy P
Object Type:
Report
System:
The UNT Digital Library
Year-by-Year Highlights of The Waxahachie Chautauqua: 1899 to 1930
Document containing a timeline of the Waxahachie Chautauqua Association events from 1899 to 1930.
Date:
2001~
Creator:
Hunter, Kirk & Moore, Maureen
Object Type:
Text
System:
The UNT Digital Library
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 13, Ed. 1, Thursday, February 1, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
February 1, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 14, Ed. 1, Thursday, February 8, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
February 8, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 15, Ed. 1, Thursday, February 15, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
February 15, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 16, Ed. 1, Thursday, February 22, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
February 22, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 17, Ed. 1, Thursday, March 1, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
March 1, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 18, Ed. 1, Thursday, March 22, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
March 22, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 19, Ed. 1, Thursday, March 29, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
March 29, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 20, Ed. 1, Thursday, April 5, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
April 5, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 21, Ed. 1, Thursday, April 19, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
April 19, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 22, Ed. 1, Thursday, April 26, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
April 26, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 91, No. 23, Ed. 1, Thursday, May 3, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
May 3, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Yellow Jacket (Brownwood, Tex.), Vol. 92, No. 1, Ed. 1, Monday, August 27, 2001
Weekly student newspaper from Howard Payne University in Brownwood, Texas that includes local, state and campus news along with advertising.
Date:
August 27, 2001
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History