Detection of the Characteristic Pion-Decay Signature in Supernova Remnants (open access)

Detection of the Characteristic Pion-Decay Signature in Supernova Remnants

Provides direct evidence that cosmic-ray protons are accelerated in SNRs.
Date: April 22, 2013
Creator: Ackermann, M.; Ajello, M.; Allafort, A.; Baldini, L.; Ballet, J.; Barbiellini, G. et al.
Object Type: Article
System: The UNT Digital Library
X-ray diffraction diagnostic design for the National Ignition Facility (open access)

X-ray diffraction diagnostic design for the National Ignition Facility

None
Date: August 22, 2013
Creator: Ahmed, M F; Ayers, J; House, A; Lamb, Z; Swift, R & Swift, D
Object Type: Article
System: The UNT Digital Library
GAMMA DETECTOR RESPONSE/SOIL CONCENTRATION CORRELATION STUDY AT THE AAR MANUFACTURING, INC. SITE, LIVONIA, MICHIGAN (open access)

GAMMA DETECTOR RESPONSE/SOIL CONCENTRATION CORRELATION STUDY AT THE AAR MANUFACTURING, INC. SITE, LIVONIA, MICHIGAN

At the NRC�s request, ORAU conducted surveys of the AAR Manufacturing site during the period of September 25 through September 27, 2012. The survey activities included walkover surveys and sampling activities. Once the survey team was onsite, the NRC personnel decided to forgo survey activities in the �New Addition� and the pickling area. Areas of the planned study boundary were inaccessible due to overgrowth/large pieces of concrete covering the soil surface; therefore, the study boundary was redefined. Gamma walkover scans of the site boundary and �front yard� identified multiple areas of elevated gamma radiation. As a result, two judgmental samples were collected. Sample results were above thorium background levels The answer to the PSQ relating to the relationship between thorium concentration in soil and NaI instrument response is �Yes.� NaI instrument response can be used as a predictor of Th-232 concentration in the 0 to 1 m layer. An R2 value of 0.79 was determined for the surface soil relationship, thus satisfying the DQOs. Moreover, the regression was cross-checked by comparing the predicted Th-232 soil core concentration to the average Th-232 concentration (Section 5.3.2). Based on the cross-check, the regression equation provides a reasonable estimate for the Th-232 concentration at …
Date: March 22, 2013
Creator: Altic, Nick A.
Object Type: Report
System: The UNT Digital Library
Distributive Distillation Enabled by Microchannel Process Technology (open access)

Distributive Distillation Enabled by Microchannel Process Technology

The application of microchannel technology for distributive distillation was studied to achieve the Grand Challenge goals of 25% energy savings and 10% return on investment. In Task 1, a detailed study was conducted and two distillation systems were identified that would meet the Grand Challenge goals if the microchannel distillation technology was used. Material and heat balance calculations were performed to develop process flow sheet designs for the two distillation systems in Task 2. The process designs were focused on two methods of integrating the microchannel technology – 1) Integrating microchannel distillation to an existing conventional column, 2) Microchannel distillation for new plants. A design concept for a modular microchannel distillation unit was developed in Task 3. In Task 4, Ultrasonic Additive Machining (UAM) was evaluated as a manufacturing method for microchannel distillation units. However, it was found that a significant development work would be required to develop process parameters to use UAM for commercial distillation manufacturing. Two alternate manufacturing methods were explored. Both manufacturing approaches were experimentally tested to confirm their validity. The conceptual design of the microchannel distillation unit (Task 3) was combined with the manufacturing methods developed in Task 4 and flowsheet designs in Task 2 to …
Date: January 22, 2013
Creator: Arora, Ravi
Object Type: Report
System: The UNT Digital Library
Image Processing And Control Of A Programmable Spatial Light Modulator For Spatial Beam Shaping (open access)

Image Processing And Control Of A Programmable Spatial Light Modulator For Spatial Beam Shaping

None
Date: January 22, 2013
Creator: Awwal, A. S.; Orth, C.; Tse, E.; Matone, J.; Paul, M.; Hardy, C. et al.
Object Type: Article
System: The UNT Digital Library
Design and implementation of Dilation X-ray Imager for National Ignition Facility "DIXI" (open access)

Design and implementation of Dilation X-ray Imager for National Ignition Facility "DIXI"

None
Date: August 22, 2013
Creator: Ayers, M. J.; Bell, P. M.; Bradley, D.; Chung, M.; Felker, B.; Hares, J. et al.
Object Type: Article
System: The UNT Digital Library
Up Sector of Minimal Flavor Violation: Top-Quark Properties and Direct D Meson CP Violation (open access)

Up Sector of Minimal Flavor Violation: Top-Quark Properties and Direct D Meson CP Violation

None
Date: August 22, 2013
Creator: Bai, Yang; /Wisconcin U., Madison; Berger, Joshua; Hewett, JoAnne L.; Li, Ye & /SLAC
Object Type: Article
System: The UNT Digital Library
Final Report for the University-Based Detector Research and Development for the International Linear Collider (open access)

Final Report for the University-Based Detector Research and Development for the International Linear Collider

The U.S Linear Collider Detector R&D program, supported by the DOE and NSF umbrella grants to the University of Oregon, made significant advances on many critical aspects of the ILC detector program. Progress advanced on vertex detector sensor development, silicon and TPC tracking, calorimetry on candidate technologies, and muon detection, as well as on beamline measurements of luminosity, energy, and polarization.
Date: April 22, 2013
Creator: Brau, James E.
Object Type: Report
System: The UNT Digital Library
Crystalline Ceramic Waste Forms: Comparison Of Reference Process For Ceramic Waste Form Fabrication (open access)

Crystalline Ceramic Waste Forms: Comparison Of Reference Process For Ceramic Waste Form Fabrication

The research conducted in this work package is aimed at taking advantage of the long term thermodynamic stability of crystalline ceramics to create more durable waste forms (as compared to high level waste glass) in order to reduce the reliance on engineered and natural barrier systems. Durable ceramic waste forms that incorporate a wide range of radionuclides have the potential to broaden the available disposal options and to lower the storage and disposal costs associated with advanced fuel cycles. Assemblages of several titanate phases have been successfully demonstrated to incorporate radioactive waste elements, and the multiphase nature of these materials allows them to accommodate variation in the waste composition. Recent work has shown that they can be produced from a melting and crystallization process. The objective of this report is to explore the phase formation and microstructural differences between lab scale melt processing in varying gas environments with alternative densification processes such as Hot Pressing (HP) and Spark Plasma Sintering (SPS). The waste stream used as the basis for the development and testing is a simulant derived from a combination of the projected Cs/Sr separated stream, the Trivalent Actinide - Lanthanide Separation by Phosphorous reagent Extraction from Aqueous Komplexes (TALSPEAK) …
Date: August 22, 2013
Creator: Brinkman, K. S.; Marra, J. C.; Amoroso, J. & Tang, M.
Object Type: Report
System: The UNT Digital Library
Single-Spin Asymmetries in Semi-inclusive Deep Inelastic Scattering and Drell-Yan Processes (open access)

Single-Spin Asymmetries in Semi-inclusive Deep Inelastic Scattering and Drell-Yan Processes

None
Date: April 22, 2013
Creator: Brodsky, Stanley J.; Hwang, Dae Sung; Kovchegov, Yuri V.; Schmidt, Ivan & Sievert, Matthew D.
Object Type: Article
System: The UNT Digital Library
A Feasibility Study of an e e- Ring Collider for Higgs Factory (open access)

A Feasibility Study of an e e- Ring Collider for Higgs Factory

None
Date: April 22, 2013
Creator: Cai, Yunhai; Chao, Alex; Nosochkov, Yuri; Wienands, Uli & Zimmermann, Frank
Object Type: Article
System: The UNT Digital Library
DEVELOPMENT OF GENOMIC AND GENETIC TOOLS FOR FOXTAIL MILLET, AND USE OF THESE TOOLS IN THE IMPROVEMENT OF BIOMASS PRODUCTION FOR BIOENERGY CROPS (open access)

DEVELOPMENT OF GENOMIC AND GENETIC TOOLS FOR FOXTAIL MILLET, AND USE OF THESE TOOLS IN THE IMPROVEMENT OF BIOMASS PRODUCTION FOR BIOENERGY CROPS

Foxtail millet (Setaria italica L.) is a warm-season, C4 annual crop commonly grown for grain and forage worldwide. It has a relatively short generation time, yet produces hundreds of seeds per inflorescence. The crop is inbred and it has a small-size genome (~500 Mb). These features make foxtail millet an attractive grass model, especially for bioenergy crops. While a number of genomic tools have been established for foxtail millet, including a fully sequenced genome and molecular markers, the objectives of this project were to develop a tissue culture system, determine the best explant(s) for tissue culture, optimize transient gene expression, and establish a stable transformation system for foxtail millet cultivar Yugu1. In optimizing a tissue culture medium for the induction of calli and somatic embryos from immature inflorescences and mature seed explants, Murashige and Skoog medium containing 2.5 mg l-1 2,4-dichlorophenoxyacetic acid and 0.6 mg l-1 6- benzylaminopurine was determined to be optimal for callus induction of foxtail millet. The efficiency of callus induction from explants of immature inflorescences was significantly higher at 76% compared to that of callus induction from mature seed explants at 68%. The calli induced from this medium were regenerated into plants at high frequency (~100%) …
Date: January 22, 2013
Creator: Chen, Xinlu; Zale, Janice & Chen, Feng
Object Type: Report
System: The UNT Digital Library
Expediting Groundwater Sampling at Hanford and Making It Safer (open access)

Expediting Groundwater Sampling at Hanford and Making It Safer

The CH2M HILL Plateau Remediation Company (CHPRC) manages the groundwatermonitoring programs at the Department of Energy's 586-square-mile Hanford site in southeastern Washington state. These programs are regulated by the Resource Conservation and Recovery Act (RCRA), the Comprehensive Environmental Response Compensation and Liability Act (CERCLA), and the Atomic Energy Act (AEA). The purpose of monitoring is to track existing groundwater contamination from past practices, as well as other potential contamination that might originate from RCRA treatment, storage, and disposal (TSD) facilities. An integral part of the groundwater-monitoring program involves taking samples of the groundwater and measuring the water levels in wells scattered across the site. Each year, more than 1,500 wells are accessed for a variety of reasons.
Date: January 22, 2013
Creator: Connell, Carl W. Jr.; Carr, Jennifer S.; Hildebrand, R. Douglas; Schatz, Aaron L.; Conley, S. F. & Brown, W. L.
Object Type: Article
System: The UNT Digital Library
Report on the AMF2 RPH Stabilization Platform: Design and Evaluation (open access)

Report on the AMF2 RPH Stabilization Platform: Design and Evaluation

None
Date: June 22, 2013
Creator: Coulter, R.L. & Martin, T.J. (Environmental Science Division)
Object Type: Report
System: The UNT Digital Library
Experimental And Theoretical High Energy Physics Research At UCLA (open access)

Experimental And Theoretical High Energy Physics Research At UCLA

This is the final report of the UCLA High Energy Physics DOE Grant No. DE-FG02- 91ER40662. This report covers the last grant project period, namely the three years beginning January 15, 2010, plus extensions through April 30, 2013. The report describes the broad range of our experimental research spanning direct dark matter detection searches using both liquid xenon (XENON) and liquid argon (DARKSIDE); present (ICARUS) and R&D for future (LBNE) neutrino physics; ultra-high-energy neutrino and cosmic ray detection (ANITA); and the highest-energy accelerator-based physics with the CMS experiment and CERN’s Large Hadron Collider. For our theory group, the report describes frontier activities including particle astrophysics and cosmology; neutrino physics; LHC interaction cross section calculations now feasible due to breakthroughs in theoretical techniques; and advances in the formal theory of supergravity.
Date: July 22, 2013
Creator: Cousins, Robert D.
Object Type: Report
System: The UNT Digital Library
Determination Of Reportable Radionuclides For DWPF Sludge Batch 7B (Macrobatch 9) (open access)

Determination Of Reportable Radionuclides For DWPF Sludge Batch 7B (Macrobatch 9)

The Waste Acceptance Product Specifications (WAPS) 1.2 require that “The Producer shall report the inventory of radionuclides (in Curies) that have half-lives longer than 10 years and that are, or will be, present in concentrations greater than 0.05 percent of the total inventory for each waste type indexed to the years 2015 and 3115”. As part of the strategy to comply with WAPS 1.2, the Defense Waste Processing Facility (DWPF) will report for each waste type, all radionuclides (with half-lives greater than 10 years) that have concentrations greater than 0.01 percent of the total inventory from time of production through the 1100 year period from 2015 through 3115. The initial listing of radionuclides to be included is based on the design-basis glass as identified in the Waste Form Compliance Plan (WCP) and Waste Form Qualification Report (WQR). However, it is required that this list be expanded if other radionuclides with half-lives greater than 10 years are identified that may meet the greater than 0.01% criterion for Curie content. Specification 1.6 of the WAPS, International Atomic Energy Agency (IAEA) Safeguards Reporting for High Level Waste (HLW), requires that the ratio by weights of the following uranium and plutonium isotopes be reported: …
Date: August 22, 2013
Creator: Crawford, C. L. & DiPrete, D. P.
Object Type: Report
System: The UNT Digital Library
Application of Direct Assessment Approaches and Methodologies to Cathodically Protected Nuclear Waste Transfer Lines (open access)

Application of Direct Assessment Approaches and Methodologies to Cathodically Protected Nuclear Waste Transfer Lines

The U.S. Department of Energy's (DOE) Hanford Site is responsible for the safe storage, retrieval, treatment, and disposal of approximately 54 million gallons (204 million liters) of radioactive waste generated since the site's inception in 1943. Today, the major structures involved in waste management at Hanford include 149 carbon steel single-shell tanks, 28 carbon-steel double-shell tanks, plus a network of buried metallic transfer lines and ancillary systems (pits, vaults, catch tanks, etc.) required to store, retrieve, and transfer waste within the tank farm system. Many of the waste management systems at Hanford are still in use today. In response to uncertainties regarding the structural integrity of these systems,' an independent, comprehensive integrity assessment of the Hanford Site piping system was performed. It was found that regulators do not require the cathodically protected pipelines located within the Hanford Site to be assessed by External Corrosion Direct Assessment (ECDA) or any other method used to ensure integrity. However, a case study is presented discussing the application of the direct assessment process on pipelines in such a nuclear environment. Assessment methodology and assessment results are contained herein. An approach is described for the monitoring, integration of outside data, and analysis of this information …
Date: January 22, 2013
Creator: Dahl, Megan M.; Pikas, Joseph; Edgemon, Glenn L. & Philo, Sarah
Object Type: Article
System: The UNT Digital Library
Micro-Anatomy Imager (open access)

Micro-Anatomy Imager

None
Date: April 22, 2013
Creator: Demos, S G
Object Type: Report
System: The UNT Digital Library
A New Pad-Based Neutron Detector for Stereo Coded Aperture Thermal Neutron Imaging (open access)

A New Pad-Based Neutron Detector for Stereo Coded Aperture Thermal Neutron Imaging

N/A
Date: October 22, 2013
Creator: Dioszegi, I.; Yu, B.; Smith, G.; Schaknowski, N.; Fried, J.; Vanier, P. E. et al.
Object Type: Article
System: The UNT Digital Library
Demonstration of Cascaded Optical Inverse Free-Electron Laser Accelerator (open access)

Demonstration of Cascaded Optical Inverse Free-Electron Laser Accelerator

None
Date: May 22, 2013
Creator: Dunning, M.; Hemsing, E.; Hast, C.; Raubenheimer, T. O.; Weathersby, S.; Xiang, D. et al.
Object Type: Article
System: The UNT Digital Library
Approaches for Addressing Risks in Reprocessing Facilities: An Assessment (open access)

Approaches for Addressing Risks in Reprocessing Facilities: An Assessment

N/A
Date: September 22, 2013
Creator: G., Martinez-Guridi; V., Mubayi & Bari, R. A.
Object Type: Article
System: The UNT Digital Library
Summary Report of Ecological Risk Assessment for the Operation of the Explosives Waste Treatment Facility at Site 300 of the Lawrence Livermore National Laboratory. (open access)

Summary Report of Ecological Risk Assessment for the Operation of the Explosives Waste Treatment Facility at Site 300 of the Lawrence Livermore National Laboratory.

None
Date: November 22, 2013
Creator: Gallegos, G M & Terusaki, S H
Object Type: Report
System: The UNT Digital Library
Final Report for Enhancing the MPI Programming Model for PetaScale Systems (open access)

Final Report for Enhancing the MPI Programming Model for PetaScale Systems

This project performed research into enhancing the MPI programming model in two ways: developing improved algorithms and implementation strategies, tested and realized in the MPICH implementation, and exploring extensions to the MPI standard to better support PetaScale and ExaScale systems.
Date: July 22, 2013
Creator: Gropp, William Douglas
Object Type: Report
System: The UNT Digital Library
U.S. Offshore Wind Manufacturing and Supply Chain Development (open access)

U.S. Offshore Wind Manufacturing and Supply Chain Development

The objective of the report is to provide an assessment of the domestic supply chain and manufacturing infrastructure supporting the U.S. offshore wind market. The report provides baseline information and develops a strategy for future development of the supply chain required to support projected offshore wind deployment levels. A brief description of each of the key chapters includes: » Chapter 1: Offshore Wind Plant Costs and Anticipated Technology Advancements. Determines the cost breakdown of offshore wind plants and identifies technical trends and anticipated advancements in offshore wind manufacturing and construction. » Chapter 2: Potential Supply Chain Requirements and Opportunities. Provides an organized, analytical approach to identifying and bounding the uncertainties associated with a future U.S. offshore wind market. It projects potential component-level supply chain needs under three demand scenarios and identifies key supply chain challenges and opportunities facing the future U.S. market as well as current suppliers of the nation’s land-based wind market. » Chapter 3: Strategy for Future Development. Evaluates the gap or competitive advantage of adding manufacturing capacity in the U.S. vs. overseas, and evaluates examples of policies that have been successful . » Chapter 4: Pathways for Market Entry. Identifies technical and business pathways for market entry …
Date: February 22, 2013
Creator: Hamilton, Bruce Duncan
Object Type: Report
System: The UNT Digital Library