RF Systems in a Neutrino Factory (open access)

RF Systems in a Neutrino Factory

Based on existing sources, I compile parameters for the RF systems for a neutrino factory which accelerates to 10 GeV.
Date: September 7, 2012
Creator: Berg, J. S.
Object Type: Report
System: The UNT Digital Library
Discovery of Very High Energy Gamma-Ray Emission from 1FGL J2001.1 4351 by MAGIC (open access)

Discovery of Very High Energy Gamma-Ray Emission from 1FGL J2001.1 4351 by MAGIC

We report the discovery of Very High Energy (VHE; >100 GeV) gamma-ray emission from the source 1FGL J2001.1+4351, (RA 20 01 13.5, dec 43 53 02.8, J2000), which is positionally consistent with the location of the flat spectrum radio source MG4 J200112+4352 (RA 20 01 12.9, dec 43 52 52.8, J2000). The VHE detection is based on a 1.5 hour-long observation performed on July 16th in stereoscopic mode with the two 17m diameter imaging Cherenkov telescopes on La Palma, Canary Islands, Spain. The preliminary analysis of the MAGIC data using the standard cuts optimized for soft energy spectra sources yields a detection of 125 gamma-rays above 90 GeV, corresponding to a pre-trail statistical significance of 7.6 standard deviations. The observed flux is estimated to be {approx}20% of the Crab nebula flux above 100 GeV. Earlier MAGIC observations indicated a substantially lower flux; hence indicating that the source is variable on a few days timescale.
Date: May 7, 2012
Creator: Berger, Karsten; Paneque, David & Giavitto, Gianluca
Object Type: Article
System: The UNT Digital Library
Enhanced NIF Neutron Activation Diagnostics (open access)

Enhanced NIF Neutron Activation Diagnostics

None
Date: May 7, 2012
Creator: Yeamans, C B; Bleuel, D L & Bernstein, L A
Object Type: Article
System: The UNT Digital Library
Occupational radiation Exposure at Agreement State-Licensed Materials Facilities, 1997-2010 (open access)

Occupational radiation Exposure at Agreement State-Licensed Materials Facilities, 1997-2010

The purpose of this report is to examine occupational radiation exposures received under Agreement State licensees. As such, this report reflects the occupational radiation exposure data contained in the Radiation Exposure Information and Reporting System (REIRS) database, for 1997 through 2010, from Agreement State-licensed materials facilities.
Date: July 7, 2012
Creator: U.S. Nuclear Regulatory Commission, Office of Nuclear Regulatory Research
Object Type: Report
System: The UNT Digital Library
Experimental techniques for measuring Rayleigh-Taylor instability in inertial confinement fusion (ICF) (open access)

Experimental techniques for measuring Rayleigh-Taylor instability in inertial confinement fusion (ICF)

Rayleigh-Taylor (RT) instability is one of the major concerns in inertial confinement fusion (ICF) because it amplifies target modulations in both acceleration and deceleration phases of implosion, which leads to shell disruption and performance degradation of imploding targets. This article reviews experimental results of the RT growth experiments performed on OMEGA laser system, where targets were driven directly with laser light. RT instability was studied in the linear and nonlinear regimes. The experiments were performed in acceleration phase, using planar and spherical targets, and in deceleration phase of spherical implosions, using spherical shells. Initial target modulations consisted of 2-D pre-imposed modulations, and 2-D and 3-D modulations imprinted on targets by the non-uniformities in laser drive. In planar geometry, the nonlinear regime was studied using 3-D modulations with broadband spectra near nonlinear saturation levels. In acceleration-phase, the measured modulation Fourier spectra and nonlinear growth velocities are in good agreement with those predicted by Haan's model [Haan S W 1989 Phys. Rev. A 39 5812]. In a real-space analysis, the bubble merger was quantified by a self-similar evolution of bubble size distributions [Oron D et al 2001 Phys. Plasmas 8, 2883]. The 3-D, inner-surface modulations were measured to grow throughout the deceleration …
Date: June 7, 2012
Creator: Smalyuk, V A
Object Type: Article
System: The UNT Digital Library
Evaluation Of Methods To Measure Hydrogen Generation Rate In A Shielded Cell Environment And A Method Recommendation (open access)

Evaluation Of Methods To Measure Hydrogen Generation Rate In A Shielded Cell Environment And A Method Recommendation

The purpose of this document is to describe the current state of the art for determination of hydrogen generation rates of radioactive slurries and solutions to provide a basis for design, fabrication, testing, and implementation of a measurement method for Hydrogen Generation Rate (HGR) during qualification of waste feeds for the Hanford Waste Treatment and Immobilization Plant (WTP). The HGR measurement will be performed on samples of the Low Activity Waste (LAW) and High Level Waste (HLW) staged waste feeds for the WTP as well as on samples from selected unit operations testing during the qualification program. SRNL has performed a review of techniques utilized to measure HGR of high level radioactive waste slurries, evaluated the Hanford 222-S Laboratory method for measurement of hydrogen, and reviewed the hydrogen generation rate models for Hanford waste.Based on the literature review, method evaluation, and SRNL experience with measuring hydrogen generation rate, SRNL recommends that a continuous flow system with online gas analysis be used as the HGR measurement method during waste qualification.
Date: November 7, 2012
Creator: Stone, M. E.
Object Type: Report
System: The UNT Digital Library
Assessing the Economic Value and Optimal Structure of Large-scale Energy Storage (open access)

Assessing the Economic Value and Optimal Structure of Large-scale Energy Storage

None
Date: November 7, 2012
Creator: Lamont, A
Object Type: Report
System: The UNT Digital Library
Science and Technology Review April/May 2012 (open access)

Science and Technology Review April/May 2012

This month's issue has the following articles: (1) Lawrence Livermore as the 'Go-To' National Security Laboratory - Commentary by Penrose (Parney) C. Albright; (2) Launching Traffic Cameras into Space - The Space-Based Telescopes for Actionable Refinement of Ephemeris project is designing nanosatellites to more accurately determine the trajectory of space objects orbiting Earth; (3)An Improved Tool for Nuclear Forensics - Resonance ionization mass spectrometry provides rapid isotopic analysis for studying materials derived from nuclear events; (4) A Simple Way to Better Protect Soldiers against Head Trauma - A modest increase in the foam padding used in Army helmets could significantly reduce brain injuries; and (5) Shocking Aluminum for Greater Understanding - Experiments using a laser beam to hit a thin film of aluminum provide an unprecedented look into the physics of shock waves traveling through a metal.
Date: March 7, 2012
Creator: Poyneer, L A
Object Type: Report
System: The UNT Digital Library
World Climate Research Programme (WCRP) Open Science Conference Final Report (open access)

World Climate Research Programme (WCRP) Open Science Conference Final Report

Travel support was provided for a range of invited speakers, students, early-career, and developing-country, and key scientists who required financial assistance to participate, and would otherwise be unable to attend, to contribute to, and benefit from, this important event. This support also allowed participants to present their research findings, provide input to WCRP planning and plans, and encourage collaboration with other research scientists. In particular, the participation and engagement of regional scientists in the OSC helped to ensure communication and advocacy in identifying the climate research needs of the region and their inclusion in the WCRP long-range research priorities.
Date: November 7, 2012
Creator: Honchar, Amy
Object Type: Report
System: The UNT Digital Library
Opposed Port Alignment System (OPAS): A Commercial Astronomical Telescope Modified for Viewing the Interior of the NIF Target Chamber (open access)

Opposed Port Alignment System (OPAS): A Commercial Astronomical Telescope Modified for Viewing the Interior of the NIF Target Chamber

None
Date: August 7, 2012
Creator: Manuel, A M; McCarville, T J; Seppala, L G; Klingmann, J L & Kalantar, D H
Object Type: Article
System: The UNT Digital Library
Characterization of U-Mo Foils for AFIP-7 (open access)

Characterization of U-Mo Foils for AFIP-7

Twelve AFIP in-process foil samples, fabricated by either Y-12 or LANL, were shipped from LANL to PNNL for potential characterization using optical and scanning electron microscopy techniques. Of these twelve, nine different conditions were examined to one degree or another using both techniques. For this report a complete description of the results are provided for one archive foil from each source of material, and one unirradiated piece of a foil of each source that was irradiated in the Advanced Test Reactor. Additional data from two other LANL conditions are summarized in very brief form in an appendix. The characterization revealed that all four characterized conditions contained a cold worked microstructure to different degrees. The Y-12 foils exhibited a higher degree of cold working compared to the LANL foils, as evidenced by the highly elongated and obscure U-Mo grain structure present in each foil. The longitudinal orientations for both of the Y-12 foils possesses a highly laminar appearance with such a distorted grain structure that it was very difficult to even offer a range of grain sizes. The U-Mo grain structure of the LANL foils, by comparison, consisted of a more easily discernible grain structure with a mix of equiaxed and …
Date: November 7, 2012
Creator: Edwards, Danny J.; Ermi, Ruby M.; Schemer-Kohrn, Alan L.; Overman, Nicole R.; Henager, Charles H.; Burkes, Douglas et al.
Object Type: Report
System: The UNT Digital Library
9978 AND 9975 TYPE B PACKAGING INTERNAL DATA COLLECTION FEASIBILITY TESTING (open access)

9978 AND 9975 TYPE B PACKAGING INTERNAL DATA COLLECTION FEASIBILITY TESTING

The objective of this report is to document the findings from a series of proof-of-concept tests performed by Savannah River National Laboratory (SRNL) R and D Engineering, for the DOE Packaging Certification Program to determine if a viable radio link could be established from within the stainless steel confines of several drum-style DOE certified Type B radioactive materials packagings. Two in-hand, off-the-shelf radio systems were tested. The first system was a Wi-Fi Librestream Onsight{trademark} camera with a Fortress ES820 Access Point and the second was the On-Ramp Wireless Ultra-Link Processing{trademark} (ULP) radio system. These radio systems were tested within the Model 9975 and 9978 Type B packagings at the SRNL. This report documents the test methods and results. A path forward will also be recommended.
Date: May 7, 2012
Creator: Fogle, R.
Object Type: Report
System: The UNT Digital Library
Intuitive visualizations through multi-domain projections for performance analysis at scale (open access)

Intuitive visualizations through multi-domain projections for performance analysis at scale

None
Date: March 7, 2012
Creator: Bhatele, A; Bremer, P T; Gamblin, T & Schulz, M
Object Type: Report
System: The UNT Digital Library
Close-Out of OIG Report No. 11-P-0702, Procedural Review of Greenhouse Gases Endangerment Finding Data Quality Processes, September 26, 2011 (open access)

Close-Out of OIG Report No. 11-P-0702, Procedural Review of Greenhouse Gases Endangerment Finding Data Quality Processes, September 26, 2011

OIG analysis of EPA response to OIG Report No. 11-P-0702, "Procedural Review of Greenhouse Gases Endangerment Finding Data Quality Processes", September 26, 2011.
Date: February 7, 2012
Creator: United States. Environmental Protection Agency. Office of the Inspector General.
Object Type: Text
System: The UNT Digital Library
Environmental Justice Strategic Plan: 2012-2014 (open access)

Environmental Justice Strategic Plan: 2012-2014

This is the United States Department of Agriculture's environmental justice strategic plan for 2012-2014.
Date: February 7, 2012
Creator: United States. Department of Agriculture.
Object Type: Text
System: The UNT Digital Library
Trafficking in Persons: U.S. Policy and Issues for Congress (open access)

Trafficking in Persons: U.S. Policy and Issues for Congress

This report focuses on international and domestic human trafficking and U.S. policy responses, with particular emphasis on the Trafficking Victims Protection Act of 2000 (TVPA) and its subsequent reauthorizations.
Date: December 7, 2012
Creator: Siskin, Alison & Wyler, Liana Sun
Object Type: Report
System: The UNT Digital Library
Federal Pollution Control Laws: How Are They Enforced? (open access)

Federal Pollution Control Laws: How Are They Enforced?

This report provides an overview of the statutory framework, key players, infrastructure, resources, tools, and operations associated with enforcement and compliance of the major pollution control laws and regulations administered by Environmental Protection Agency (EPA). It also outlines the roles of federal (including regional offices) and state regulators, as well as the regulated community.
Date: July 7, 2012
Creator: Esworthy, Robert
Object Type: Report
System: The UNT Digital Library
Longitudinal Bunch Pattern Measurements through Single Photon Counting at SPEAR3 (open access)

Longitudinal Bunch Pattern Measurements through Single Photon Counting at SPEAR3

The Stanford Synchrotron Radiation Lightsource (SSRL), a division of SLAC National Accelerator Laboratory, is a synchrotron light source that provides x-rays for experimental use. As electrons are bent in the storage ring, they emit electromagnetic radiation. There are 372 different buckets which electrons can be loaded into. Different filling patterns produce different types of x-rays. What is the bunch pattern at a given time? Which filling pattern is better? Are there any flaws to the current injection system? These questions can be answered with this single photon counting experiment.
Date: September 7, 2012
Creator: Wang, Hongyi (Jack) & /UC, San Diego
Object Type: Report
System: The UNT Digital Library
RAPID RADIOCHEMICAL ANALYSES IN SUPPORT OF FUKUSHIMA NUCLEAR ACCIDENT (open access)

RAPID RADIOCHEMICAL ANALYSES IN SUPPORT OF FUKUSHIMA NUCLEAR ACCIDENT

There is an increasing need to develop faster analytical methods for emergency response, including emergency soil and air filter samples. The Savannah River National Laboratory (SRNL) performed analyses on samples received from Japan in April, 2011 as part of a U.S. Department of Energy effort to provide assistance to the government of Japan, following the nuclear event at Fukushima Daiichi, resulting from the earthquake and tsunami on March 11, 2011. Of particular concern was whether it was safe to plant rice in certain areas (prefectures) near Fukushima. The primary objectives of the sample collection, sample analysis, and data assessment teams were to evaluate personnel exposure hazards, identify the nuclear power plant radiological source term and plume deposition, and assist the government of Japan in assessing any environmental and agricultural impacts associated with the nuclear event. SRNL analyzed approximately 250 samples and reported approximately 500 analytical method determinations. Samples included soil from farmland surrounding the Fukushima reactors and air monitoring samples of national interest, including those collected at the U.S. Embassy and American military bases. Samples were analyzed for a wide range of radionuclides, including strontium-89, strontium-90, gamma-emitting radionuclides, and plutonium, uranium, americium and curium isotopes. Technical aspects of the rapid …
Date: November 7, 2012
Creator: Maxwell, S.
Object Type: Article
System: The UNT Digital Library
Scientific/Techical Report (open access)

Scientific/Techical Report

The ACNS provides a focal point for the North American neutron user community, strengthening ties within this diverse group, and promoting neutron research in related disciplines. The conference thus serves a dual role as both a national user meeting and a scientific meeting. As a venue for scientific exchange, the ACNS showcases recent results and provides a forum for scientific discussion of neutron-enabled research in fields as diverse as hard and soft condensed matter, liquids, biology, magnetism, engineering materials, chemical spectroscopy, crystal structure, elementary excitations, fundamental physics, and development of neutron instrumentation. This is achieved through a combination of invited oral presentations, contributed oral presentations, and poster sessions. Adequate opportunity for spontaneous discussion and collaboration is also built into the ACNS program in order to foster free exchange of new scientific ideas and the potential for use of powerful neutron scattering methods beyond the current realms of application. The sixth American Conference on Neutron Scattering (ACNS 2012) provided essential information on the breadth and depth of current neutron-related research worldwide. A strong program of plenary, invited and contributed talks showcased recent scientific results in neutron science in a wide range of fields, including soft and hard condensed matter, biology, chemistry, …
Date: November 7, 2012
Creator: Dr. Chris Leighton, Neutron Scattering Society of American & Mr. J. Ardie (Butch) Dillen, MRS Director of Finance and Administration
Object Type: Report
System: The UNT Digital Library
Channeling through Bent Crystals (open access)

Channeling through Bent Crystals

Bent crystals have demonstrated potential for use in beam collimation. A process called channeling is when accelerated particle beams are trapped by the nuclear potentials in the atomic planes within a crystal lattice. If the crystal is bent then the particles can follow the bending angle of the crystal. There are several different effects that are observed when particles travel through a bent crystal including dechanneling, volume capture, volume reflection and channeling. With a crystal placed at the edge of a particle beam, part of the fringe of the beam can be deflected away towards a detector or beam dump, thus helping collimate the beam. There is currently FORTRAN code by Igor Yazynin that has been used to model the passage of particles through a bent crystal. Using this code, the effects mentioned were explored for beam energy that would be seen at the Facility for Advanced Accelerator Experimental Tests (FACET) at a range of crystal orientations with respect to the incoming beam. After propagating 5 meters in vacuum space past the crystal the channeled particles were observed to separate from most of the beam with some noise due to dechanneled particles. Progressively smaller bending radii, with corresponding shorter crystal …
Date: September 7, 2012
Creator: Mack, Stephanie & /SLAC, /Ottawa U.
Object Type: Report
System: The UNT Digital Library
Dark Photon Search at BABAR (open access)

Dark Photon Search at BABAR

Presented is the current progress of a search for the signature of a dark photon or new particle using the BaBar data set. We search for the processes e{sup +}e{sup -} {yields} {gamma}{sub ISR}A{prime},A{prime} {yields} e{sup +}e{sup -} and e{sup +}e{sup -} {yields} {gamma}{sub ISR}{gamma}, {gamma} {yields} A{prime},A{prime} {yields} e{sup +}e{sup -}, where {gamma}{sub ISR} is an initial state radiated photon of energy E{sub {gamma}} >= 1 GeV. Twenty-five sets of Monte Carlo, simulating e{sup +}e{sup -} collisions at an energy of 10.58 GeV, were produced with different values of the A{prime} mass ranging from 100 MeV to 9.5 GeV. The mass resolution is calculated based on Monte Carlo simulations. We implement ROOT's Toolkit for Multivariate Analysis (TMVA), a machine learning tool that allows us to evaluate the signal character of events based on many of discriminating variables. TMVA training is conducted with samples of Monte Carlo as signal and a small portion of Run 6 as background. The multivariate analysis produces additional cuts to separate signal and background. The signal efficiency and sensitivity are calculated. The analysis will move forward to fit the background and scan the residuals for the narrow resonance peak of a new particle.
Date: September 7, 2012
Creator: Greenwood, Ross N & /SLAC, /MIT
Object Type: Report
System: The UNT Digital Library
Diagnostic options for radiative divertor feedback control on NSTX-U (open access)

Diagnostic options for radiative divertor feedback control on NSTX-U

None
Date: May 7, 2012
Creator: Soukhanovskii, V A; Gerhardt, S P; Kaita, R; McLean, A G & Raman, R
Object Type: Article
System: The UNT Digital Library
A Multifaceted Mathematical Approach for Complex Systems (open access)

A Multifaceted Mathematical Approach for Complex Systems

Applied mathematics has an important role to play in developing the tools needed for the analysis, simulation, and optimization of complex problems. These efforts require the development of the mathematical foundations for scientific discovery, engineering design, and risk analysis based on a sound integrated approach for the understanding of complex systems. However, maximizing the impact of applied mathematics on these challenges requires a novel perspective on approaching the mathematical enterprise. Previous reports that have surveyed the DOE's research needs in applied mathematics have played a key role in defining research directions with the community. Although these reports have had significant impact, accurately assessing current research needs requires an evaluation of today's challenges against the backdrop of recent advances in applied mathematics and computing. To address these needs, the DOE Applied Mathematics Program sponsored a Workshop for Mathematics for the Analysis, Simulation and Optimization of Complex Systems on September 13-14, 2011. The workshop had approximately 50 participants from both the national labs and academia. The goal of the workshop was to identify new research areas in applied mathematics that will complement and enhance the existing DOE ASCR Applied Mathematics Program efforts that are needed to address problems associated with complex systems. …
Date: March 7, 2012
Creator: Alexander, F.; Anitescu, M.; Bell, J.; Brown, D.; Ferris, M.; Luskin, M. et al.
Object Type: Report
System: The UNT Digital Library