CDMSlite: A Search for Low-Mass WIMPs using Voltage-Assisted Calorimetric Ionization Detection in the SuperCDMS Experiment (open access)

CDMSlite: A Search for Low-Mass WIMPs using Voltage-Assisted Calorimetric Ionization Detection in the SuperCDMS Experiment

None
Date: February 19, 2014
Creator: Agnese, R.; Anderson, A. J.; Asai, M.; Balakishiyeva, D.; Thakur, R. Basu; Bauer, D. A. et al.
Object Type: Article
System: The UNT Digital Library
A Multi-TeV Linear Collider Based on CLIC Technology : CLIC Conceptual Design Report (open access)

A Multi-TeV Linear Collider Based on CLIC Technology : CLIC Conceptual Design Report

None
Date: February 13, 2014
Creator: Aicheler, M; Burrows, P.; Draper, M.; Garvey, T.; Lebrun, P.; Peach, K. et al.
Object Type: Report
System: The UNT Digital Library
Erosion-Resistant Nanocoatings for Improved Energy Efficiency in Gas Turbines (open access)

Erosion-Resistant Nanocoatings for Improved Energy Efficiency in Gas Turbines

The objective of this Stage Gate IV project was to test and substantiate the viability of an erosion‐resistant nanocoating for application on compressor airfoils for gas turbines in both industrial power generation and commercial aviation applications. To effectively complete this project, the National Energy Technology Laboratory’s Office of Research & Development teamed with MDS Coating Technologies Inc. (MCT), Delta Air Lines ‐ Technical Operations Division (Delta Tech Ops), and Calpine Corporation. The coating targeted for this application was MCT’s Next Generation Coating, version 4 (NGC‐v4 ‐ with the new registered trademark name of BlackGold®). The coating is an erosion and corrosion resistant composite nanostructured coating. This coating is comprised of a proprietary ceramic‐metallic nano‐composite construction which provides enhanced erosion resistance and also retains the aerodynamic geometry of the airfoils. The objective of the commercial aviation portion of the project was to substantiate the coating properties to allow certification from the FAA to apply an erosion‐resistant coating in a commercial aviation engine. The goal of the series of tests was to demonstrate that the durability of the airfoils is not affected negatively with the application of the NGC v4 coating. Tests included erosion, corrosion, vibration and fatigue. The results of the …
Date: February 5, 2014
Creator: Alman, David & Marcio, Duffles
Object Type: Report
System: The UNT Digital Library
A portable cryostat for the cold transfer of polarized solid HD targets: HDice-I (open access)

A portable cryostat for the cold transfer of polarized solid HD targets: HDice-I

A device has been developed with moveable liquid nitrogen and liquid helium volumes that is capable of reaching over two meters into the coldest regions of a cryostat or dilution refrigerator and reliably extracting or installing a target of solid, polarized hydrogen deuteride (HD). This Transfer Cryostat incorporates a cylindrical neodymium rare-earth magnet that is configured as a Halbach dipole, which is maintained at 77 K and produces a 0.1 T field around the HD target. Multiple layers provide a hermetic 77 K-shield as the device is used to maintain a target at 2 K during a transfer between cryostats. Tests with frozen-spin HD show negligible polarization loss for either H or D over typical transfer periods. Multiple target transfers with this apparatus have shown an overall reliability of about 95% per transfer, which is a significant improvement over earlier versions of the device.
Date: February 1, 2014
Creator: Bass, Christopher D.; Sandorfi, Andy M.; Bade, C.; Blecher, M.; Caracappa, A.; D'Angelo, A. et al.
Object Type: Article
System: The UNT Digital Library
Integrated Performance Testing Workshop - Supplemental Materials (Scripts and Procedures) (open access)

Integrated Performance Testing Workshop - Supplemental Materials (Scripts and Procedures)

A variety of performance tests are described relating to: Material Transfers; Emergency Evacuation; Alarm Response Assessment; and an Enhanced Limited Scope Performance Test (ELSPT). Procedures are given for: nuclear material physical inventory and discrepancy; material transfers; and emergency evacuation.
Date: February 1, 2014
Creator: Baum, Gregory A.
Object Type: Text
System: The UNT Digital Library
Sol-Gel Based Polybenzimidazole Membranes for Hydrogen Pumping Devices (open access)

Sol-Gel Based Polybenzimidazole Membranes for Hydrogen Pumping Devices

Electrochemical hydrogen pumping using a high temperature (>100°C) PBI membrane was demonstrated under non-humidified and humidified conditions at ambient pressures. Relatively low voltages were required to operate the pump over a wide range of hydrogen flow rates. The advantages of the high temperature capability were shown by operating the pump on reformate feed gas mixtures containing various amounts of CO and CO{sub 2}. Gas purity measurements on the cathode gas product were conducted and significant reductions in gas impurities were detected. The applicability of the PBI membrane for electrochemical hydrogen pumping and its durability under typical operating conditions was established with tests that lasted for nearly 4000 hours.
Date: February 26, 2014
Creator: Benicewicz, Brian
Object Type: Report
System: The UNT Digital Library
The BlackHat Library for One-Loop Amplitudes (open access)

The BlackHat Library for One-Loop Amplitudes

None
Date: February 19, 2014
Creator: Bern, Z.; Dixon, L. J.; Cordero, F. Febres; Hoeche, S.; Ita, H.; Kosower, D. A. et al.
Object Type: Article
System: The UNT Digital Library
Ntuples for NLO events at Hadron Colliders (open access)

Ntuples for NLO events at Hadron Colliders

None
Date: February 19, 2014
Creator: Bern, Z.; Dixon, L.J.; Cordero, F.Febres; Hoeche, S.; Ita, H.; Kosower, D.A. et al.
Object Type: Article
System: The UNT Digital Library
Multi-Hybrid Power Vehicles with Cost Effective and Durable Polymer Electrolyte (open access)

Multi-Hybrid Power Vehicles with Cost Effective and Durable Polymer Electrolyte

Anima Bose, the principal investigator of the project, originally proposed to develop composite membranes to operate PEMFCs at much higher temperatures than 80{degrees}C and to alleviate the flooding problems often encountered in Nafion menmbrane containing fuel cells. The PI has successfully created composite membranes by blending small quantities of octasilane-poss (OSP) with Nafion. The composite membranes exhibited temperature tolerance up to 110{degrees}C without scarifying cell performance as determined by polarization curves and proton conductivity measurements. These membranes also exhibited superior water management performance as evident from the lack of flooding. Furthermore, these fuel cells performed well under reduced humidities. Structural and thermal analyses revealed that these Nafion-octasilane composite membranes are homogenous at concentrations up to 3 wt% of the OSP and that the siloxane offers additional thermal stability.
Date: February 28, 2014
Creator: Bose, Anima
Object Type: Report
System: The UNT Digital Library
Advanced Fuels Campaign Light Water Reactor Accident Tolerant Fuel Performance Metrics Executive Summary (open access)

Advanced Fuels Campaign Light Water Reactor Accident Tolerant Fuel Performance Metrics Executive Summary

Research and development (R&D) activities on advanced, higher performance Light Water Reactor (LWR) fuels have been ongoing for the last few years. Following the unfortunate March 2011 events at the Fukushima Nuclear Power Plant in Japan, the R&D shifted toward enhancing the accident tolerance of LWRs. Qualitative attributes for fuels with enhanced accident tolerance, such as improved reaction kinetics with steam resulting in slower hydrogen generation rate, provide guidance for the design and development of fuels and cladding with enhanced accident tolerance. A common set of technical metrics should be established to aid in the optimization and down selection of candidate designs on a more quantitative basis. “Metrics” describe a set of technical bases by which multiple concepts can be fairly evaluated against a common baseline and against one another. This report describes a proposed technical evaluation methodology that can be applied to evaluate the ability of each concept to meet performance and safety goals relative to the current UO2 – zirconium alloy system and relative to one another. The resultant ranked evaluation can then inform concept down-selection, such that the most promising accident tolerant fuel design option(s) can continue to be developed toward qualification.
Date: February 1, 2014
Creator: Bragg-Sitton, Shannon
Object Type: Report
System: The UNT Digital Library
Novel QCD Phenomena and New Perspectives for Hadron Physics (open access)

Novel QCD Phenomena and New Perspectives for Hadron Physics

None
Date: February 4, 2014
Creator: Brodsky, Stanley J.
Object Type: Article
System: The UNT Digital Library

Map Matching and Real World Integrated Sensor Data Warehousing

The inclusion of interlinked temporal and spatial elements within integrated sensor data enables a tremendous degree of flexibility when analyzing multi-component datasets. The presentation illustrates how to warehouse, process, and analyze high-resolution integrated sensor datasets to support complex system analysis at the entity and system levels. The example cases presented utilizes in-vehicle sensor system data to assess vehicle performance, while integrating a map matching algorithm to link vehicle data to roads to demonstrate the enhanced analysis possible via interlinking data elements. Furthermore, in addition to the flexibility provided, the examples presented illustrate concepts of maintaining proprietary operational information (Fleet DNA) and privacy of study participants (Transportation Secure Data Center) while producing widely distributed data products. Should real-time operational data be logged at high resolution across multiple infrastructure types, map matched to their associated infrastructure, and distributed employing a similar approach; dependencies between urban environment infrastructures components could be better understood. This understanding is especially crucial for the cities of the future where transportation will rely more on grid infrastructure to support its energy demands.
Date: February 1, 2014
Creator: Burton, E.
Object Type: Presentation
System: The UNT Digital Library
Multiband Charge-Coupled Device (open access)

Multiband Charge-Coupled Device

None
Date: February 10, 2014
Creator: Chang, Chu-En; Segal, Julie D.; Roodman, Aaron J.; Howe, Roger T. & Kenney, Christopher J.
Object Type: Article
System: The UNT Digital Library
Three-Dimensional Surface Geophysical Exploration of the 200-Series Tanks at the 241-C Tank Farm (open access)

Three-Dimensional Surface Geophysical Exploration of the 200-Series Tanks at the 241-C Tank Farm

A surface geophysical exploration (SGE) survey using direct current electrical resistivity was conducted within the C Tank Farm in the vicinity of the 200-Series tanks at the Hanford Site near Richland, Washington. This survey was the second successful SGE survey to utilize the Geotection(TM)-180 Resistivity Monitoring System which facilitated a much larger survey size and faster data acquisition rate. The primary objective of the C Tank Farm SGE survey was to provide geophysical data and subsurface imaging results to support the Phase 2 RCRA Facility Investigation, as outlined in the Phase 2 RCRA Facility Investigation / Corrective Measures work plan RPP-PLAN-39114.
Date: February 26, 2014
Creator: Crook, N.; McNeill, M.; Dunham, Ralph & Glaser, Danney R.
Object Type: Report
System: The UNT Digital Library
Hall A Annual Report 2013 (open access)

Hall A Annual Report 2013

Report over the experimental activities in Hall A at Thomas Jefferson National Accelerator Facility during 2013.
Date: February 1, 2014
Creator: Dalton, Mark M.
Object Type: Text
System: The UNT Digital Library
Complementarity of LSST and WFIRST: Regarding Object Blending (open access)

Complementarity of LSST and WFIRST: Regarding Object Blending

None
Date: February 11, 2014
Creator: Dawson, W A & Schneider, M D
Object Type: Report
System: The UNT Digital Library
Evaluation of Application Space Expansion for the Sensor Fish (open access)

Evaluation of Application Space Expansion for the Sensor Fish

None
Date: February 1, 2014
Creator: Derolph, Christopher R. & Bevelhimer, Mark S.
Object Type: Report
System: The UNT Digital Library
Analysis Of Post-Wet-Chemistry Heat Treatment Effects On Nb SRF Surface Resistance (open access)

Analysis Of Post-Wet-Chemistry Heat Treatment Effects On Nb SRF Surface Resistance

Most of the current research in superconducting radio frequency (SRF) cavities is focused on ways to reduce the construction and operating cost of SRF-based accelerators as well as on the development of new or improved cavity processing techniques. The increase in quality factors is the result of the reduction of the surface resistance of the materials. A recent test on a 1.5 GHz single cell cavity made from ingot niobium of medium purity and heat treated at 1400 {degrees}C in a ultra-high vacuum induction furnace resulted in a residual resistance of ~ 1n{Ohm} and a quality factor at 2.0 K increasing with field up to ~ 5×10{sup}10 at a peak magnetic field of 90 mT. In this contribution, we present some results on the investigation of the origin of the extended Q{SUB 0}-increase, obtained by multiple HF rinses, oxypolishing and heat treatment of “all Nb” cavities.
Date: February 1, 2014
Creator: Dhakal, Pashupati; Ciovati, Gianluigi; Kneisel, Peter K. & Myneni, Ganapati Rao
Object Type: Article
System: The UNT Digital Library
The four-loop remainder function and multi-Regge behavior at NNLLA in planar N=4 super-Yang-Mills theory (open access)

The four-loop remainder function and multi-Regge behavior at NNLLA in planar N=4 super-Yang-Mills theory

None
Date: February 19, 2014
Creator: Dixon, Lance J.; Drummond, James M.; Duhr, Claude & Pennington, Jeffrey
Object Type: Article
System: The UNT Digital Library
The Artisanal Nuke (open access)

The Artisanal Nuke

None
Date: February 5, 2014
Creator: Dixon, M C
Object Type: Thesis or Dissertation
System: The UNT Digital Library
CEBAF Upgrade: Cryomodule Performance And Lessons Learned (open access)

CEBAF Upgrade: Cryomodule Performance And Lessons Learned

The Thomas Jefferson National Accelerator Facility is currently engaged in the 12 GeV Upgrade Project. The goal of the 12 GeV Upgrade is a doubling of the available beam energy of the Continuous Electron Beam Accelerator Facility (CEBAF) from 6 GeV to 12 GeV. This increase in beam energy will be due in large part to the addition of ten C100 cryomodules plus associated new RF in the CEBAF linacs. The C100 cryomodules are designed to deliver 100 MeV per installed cryomodule. Each C100 cryomodule is built around a string of eight seven-cell, electro-polished, superconducting RF cavities. While an average performance of 100MV per cryomodule is needed to achieve the overall 12 GeV beam energy goal, the actual performance goal for the cryomodules is an average energy gain of 108 MV to provide operational headroom. Cryomodule production started in December 2010. All ten of the C100 cryomodules are installed in the linac tunnels and are on schedule to complete commissioning by September 2013. Performance during Commissioning has ranged from 104 MV to 118 MV. In May, 2012 a test of an early C100 achieved 108 MV with full beam loading. This paper will discuss the performance of the C100 cryomodules …
Date: February 1, 2014
Creator: Drury, Michael A.; Davis, G. Kirk; Hogan, John P.; Hovater, J. Curt; king@jlab.org, Lawrence; Marhauser, Frank et al.
Object Type: Article
System: The UNT Digital Library
The Determination of Pertechnetate and Non-Pertechnetate Species in Hanford Tanks - Phase 1 (open access)

The Determination of Pertechnetate and Non-Pertechnetate Species in Hanford Tanks - Phase 1

An analytical method is required to distinguish between the pertechnetate and non-pertechnetate forms of technetium; currently, the methods available only report the total technetium present in a sample. The overall objective of this effort is to develop a method for routinely analyzing Hanford tank waste for technetium in the pertechnetate and the non-pertechnetate forms. A phased approach will be deployed to accomplish this objective: Phase I Comparison of existing technetium analysis methods with modification; Phase II Demonstration of modified methods using non-pertechnetate spiked simulants; and, Phase III Demonstration of chosen method on Hanford tank sample containing non-pertechnetate. This report describes the Phase I work, providing a comparison of Aliquat 336 and TEVA(R)1 in the removal of pertechnetate and discussing the subsequent analysis for technetium in both alkaline and acidic environments without oxidation. The effort was executed under LAB-PLN-13-00004, The Determination of Pertechnetate and Non-Pertechnetate Species in Hanford Tanks Phase I.
Date: February 1, 2014
Creator: Duncan, James B. & Catlow, Stanley A.
Object Type: Report
System: The UNT Digital Library
Development of Nb$_{3}$Sn Cavity Vapor Diffusion Deposition System (open access)

Development of Nb$_{3}$Sn Cavity Vapor Diffusion Deposition System

Nb$_{3}$Sn is a BCS superconductors with the superconducting critical temperature higher than that of niobium, so theoretically it surpasses the limitations of niobium in RF fields. The feasibility of technology has been demonstrated at 1.5 GHz with Nb$_{3}$Sn vapor deposition technique at Wuppertal University$~\cite{Wuppertalthebest}$. The benefit at these frequencies is more pronounced at 4.2 K, where Nb$_{3}$Sn coated cavities show RF resistances an order of magnitude lower than that of niobium. At Jefferson Lab we started the development of Nb$_{3}$Sn vapor diffusion deposition system within an R\&D development program towards compact light sources. Here we present the current progress of the system development.
Date: February 1, 2014
Creator: Eremeev, Grigory V.; Macha, Kurt M.; Clemens, William A.; Park, HyeKyoung & Williams, R. Scott
Object Type: Article
System: The UNT Digital Library
User Workshop on High-Power Lasers at the Linac Coherent Light Source (open access)

User Workshop on High-Power Lasers at the Linac Coherent Light Source

None
Date: February 7, 2014
Creator: Falcone, Roger; Glenzer, Siegfried & Hans-Riege, Stefan
Object Type: Article
System: The UNT Digital Library