LIP: The Livermore Interpolation Package, Version 1.3 (open access)

LIP: The Livermore Interpolation Package, Version 1.3

This report describes LIP, the Livermore Interpolation Package. Because LIP is a stand-alone version of the interpolation package in the Livermore Equation of State (LEOS) access library, the initials LIP alternatively stand for the ''LEOS Interpolation Package''. LIP was totally rewritten from the package described in [1]. In particular, the independent variables are now referred to as x and y, since the package need not be restricted to equation of state data, which uses variables {rho} (density) and T (temperature). LIP is primarily concerned with the interpolation of two-dimensional data on a rectangular mesh. The interpolation methods provided include piecewise bilinear, reduced (12-term) bicubic, and bicubic Hermite (biherm). There is a monotonicity-preserving variant of the latter, known as bimond. For historical reasons, there is also a biquadratic interpolator, but this option is not recommended for general use. A birational method was added at version 1.3. In addition to direct interpolation of two-dimensional data, LIP includes a facility for inverse interpolation (at present, only in the second independent variable). For completeness, however, the package also supports a compatible one-dimensional interpolation capability. Parametric interpolation of points on a two-dimensional curve can be accomplished by treating the components as a pair of one-dimensional …
Date: January 4, 2011
Creator: Fritsch, F N
Object Type: Report
System: The UNT Digital Library
Simplifying Multi-Jet QCD Computation (open access)

Simplifying Multi-Jet QCD Computation

These lectures give a pedagogical discussion of the computation of QCD tree amplitudes for collider physics. The tools reviewed are spinor products, color ordering, MHV amplitudes, and the Britto-Cachazo-Feng-Witten recursion formula.
Date: November 4, 2011
Creator: Peskin, Michael E.
Object Type: Article
System: The UNT Digital Library
Quarkonium Spectroscopy And Search for New States at BaBar (open access)

Quarkonium Spectroscopy And Search for New States at BaBar

The BaBar experiment at the PEP-II B-factory gives excellent opportunities for the quarkonium spectroscopy. Investigation of the properties of new states like the X(3872), Y(3940) and Y(4260) are performed aiming to understand their nature. Recent BaBar results will be presented in this paper. At the B-factories charmonium and charmonium-like states are copiously produced via several mechanisms: in B decay (color suppressed b {yields} c transition), double charmonium production (e{sup +}e{sup -} {yields} c{bar c} + c{bar c}), two photons production ({gamma}*{gamma}* {yields} c{bar c}, where the c{bar c} state has positive C-parity) and in initial state radiation (ISR) when the e{sup {+-}} in its initial state emits a photon lowering the effective center of mass energy of the e{sup +}e{sup -} interaction (e{sup +}e{sup -} {yields} {gamma}{sub ISR} + c{bar c}, where the charmonium state has the quantum numbers J{sup PC} = 1{sup -2}). Many new states have been recently discovered at the B-factories, BaBar and Belle, above the D{bar D} threshold in the charmonium energy region. While some of them appear to be consistent with conventional c{sub c} states others do not fit with any expectation. Several interpretations for these states have been proposed: for some of them the …
Date: November 4, 2011
Creator: Cibinetto, G.
Object Type: Article
System: The UNT Digital Library
Copper Prototype Measurements of the HOM, LOM And SOM Couplers for the ILC Crab Cavity (open access)

Copper Prototype Measurements of the HOM, LOM And SOM Couplers for the ILC Crab Cavity

The ILC Crab Cavity is positioned close to the IP and delivered luminosity is very sensitive to the wakefields induced in it by the beam. A set of couplers were designed to couple to and damp the spurious modes of the crab cavity. As the crab cavity operates using a dipole mode, it has different damping requirements from an accelerating cavity. A separate coupler is required for the monopole modes below the operating frequency of 3.9 GHz (known as the LOMs), the opposite polarization of the operating mode (the SOM), and the modes above the operating frequency (the HOMs). Prototypes of each of these couplers have been manufactured out of copper and measured attached to an aluminum nine cell prototype of the cavity and their external Q factors were measured. The results were found to agree well with numerical simulations.
Date: November 4, 2011
Creator: Burt, G.; Ambattu, P.K.; Dexter, A.C.; U., /Lancaster; Bellantoni, L.; /Fermilab et al.
Object Type: Article
System: The UNT Digital Library
Amorphous Diamond - A High-pressure Superhard Carbon Allotrope (open access)

Amorphous Diamond - A High-pressure Superhard Carbon Allotrope

This report is about the Amorphous Diamond - A High-pressure Superhard Carbon Allotrope
Date: November 4, 2011
Creator: Lin, Yu
Object Type: Article
System: The UNT Digital Library
National Energy Efficiency Evaluation, Measurement and Verification (EM&V) Standard: Scoping Study of Issues and Implementation Requirements (open access)

National Energy Efficiency Evaluation, Measurement and Verification (EM&V) Standard: Scoping Study of Issues and Implementation Requirements

This report is a scoping study that identifies issues associated with developing a national evaluation, measurement and verification (EM&V) standard for end-use, non-transportation, energy efficiency activities. The objectives of this study are to identify the scope of such a standard and define EM&V requirements and issues that will need to be addressed in a standard. To explore these issues, we provide and discuss: (1) a set of definitions applicable to an EM&V standard; (2) a literature review of existing guidelines, standards, and 'initiatives' relating to EM&V standards as well as a review of 'bottom-up' versus 'top-down' evaluation approaches; (3) a summary of EM&V related provisions of two recent federal legislative proposals (Congressman Waxman's and Markey's American Clean Energy and Security Act of 2009 and Senator Bingaman's American Clean Energy Leadership Act of 2009) that include national efficiency resource requirements; (4) an annotated list of issues that that are likely to be central to, and need to be considered when, developing a national EM&V standard; and (5) a discussion of the implications of such issues. There are three primary reasons for developing a national efficiency EM&V standard. First, some policy makers, regulators and practitioners believe that a national standard would streamline …
Date: February 4, 2011
Creator: Schiller Consulting, Inc.; Schiller, Steven R.; Goldman, Charles A. & Galawish, Elsia
Object Type: Report
System: The UNT Digital Library
Status of High Power Tests of Normal Conducting Single-Cell Structures (open access)

Status of High Power Tests of Normal Conducting Single-Cell Structures

We report the results of ongoing high power tests of single-cell standing wave structures. These tests are part of an experimental and theoretical study of rf breakdown in normal conducting structures at 11.4 GHz. The goal of this study is to determine the maximum gradient possibilities for normal-conducting rf powered particle beam accelerators. The test setup consists of reusable mode launchers and short test structures powered by SLACs XL-4 klystron. The mode launchers and structures were manufactured at SLAC and KEK and tested at the SLAC klystron test laboratory.
Date: November 4, 2011
Creator: Dolgashev, V. A.; Tantawi, S. G.; Higashi, Y. & Higo, T.
Object Type: Article
System: The UNT Digital Library
Final Report - Facilitating Wind Energy: Addressing Challenges around Visual Impacts, Noise, Credible Data, and Local Benefits through Creative Stakeholder Engagement (open access)

Final Report - Facilitating Wind Energy: Addressing Challenges around Visual Impacts, Noise, Credible Data, and Local Benefits through Creative Stakeholder Engagement

The project team consisting of the Consensus Building Institute, Inc., Raab Associates, Ltd., and the MIT-Harvard Program on Negotiation created a model and set of tools for building the capacity of state officials to effectively collaborate with diverse stakeholders in advancing wind development policy formation, wind facility siting, and transmission policy and siting. The model was used to enhance the ability of state officials to advance wind development in their states. Training was delivered in Cambridge, MA, in Spring 2011. The training and associated materials, including a Wind Energy Workbook, website, and simulations, is available for ongoing and widespread dissemination throughout the US.
Date: August 4, 2011
Creator: Harvey, Kate; Field, Patrick; Fierman, Elizabeth; Raab, Dr. Jonathan & Susskind, Dr. Lawrence
Object Type: Text
System: The UNT Digital Library
Equilibrium and Stability of Partial Toroidal Plasma Discharges (open access)

Equilibrium and Stability of Partial Toroidal Plasma Discharges

The equilibrium and stability of partial toroidal flux ropes are studied in detail in the laboratory, motivated by ubiquitous loop structures on the solar surface. The flux ropes studied here are magnetized arc discharges formed in the Magnetic Reconnection Experiment (MRX). It is found that these loops robustly maintain their equilibrium on time scales much longer than the Alfven time over a wide range of plasma current, guide eld strength, and angle between electrodes, even in the absence of a strapping fi eld. Additionally, the external kink stability of these flux ropes is found to be governed by the Kruskal-Shafranov limit for a flux rope with line-tied boundary conditions at both ends (q > 1).
Date: January 4, 2011
Creator: E. Oz, C. E. Myers, M. Yamada, H. Ji, R. Kulsrud, and J. Xie
Object Type: Report
System: The UNT Digital Library
Effects of Time, Heat, and Oxygen on K Basin Sludge Agglomeration, Strength, and Solids Volume (open access)

Effects of Time, Heat, and Oxygen on K Basin Sludge Agglomeration, Strength, and Solids Volume

Sludge disposition will be managed in two phases under the K Basin Sludge Treatment Project. The first phase is to retrieve the sludge that currently resides in engineered containers in the K West (KW) Basin pool at ~10 to 18°C. The second phase is to retrieve the sludge from interim storage in the sludge transport and storage containers (STSCs) and treat and package it in preparation for eventual shipment to the Waste Isolation Pilot Plant. The work described in this report was conducted to gain insight into how sludge may change during long-term containerized storage in the STSCs. To accelerate potential physical and chemical changes, the tests were performed at temperatures and oxygen partial pressures significantly greater than those expected in the T Plant canyon cells where the STSCs will be stored. Tests were conducted to determine the effects of 50°C oxygenated water exposure on settled quiescent uraninite (UO2) slurry and a full simulant of KW containerized sludge to determine the effects of oxygen and heat on the composition and mechanical properties of sludge. Shear-strength measurements by vane rheometry also were conducted for UO2 slurry, mixtures of UO2 and metaschoepite (UO3•2H2O), and for simulated KW containerized sludge. The results from …
Date: January 4, 2011
Creator: Delegard, Calvin H.; Sinkov, Sergey I.; Schmidt, Andrew J.; Daniel, Richard C. & Burns, Carolyn A.
Object Type: Report
System: The UNT Digital Library
Sensible Heat, Direct, Dual-Media Thermal Energy Storagy System: Phase 1 Final Technical Report (open access)

Sensible Heat, Direct, Dual-Media Thermal Energy Storagy System: Phase 1 Final Technical Report

Work under this project has ultimately focused on the development of a modular packed bed based thermal energy storage system. The design assumes the use of standard segments of carbon steel pipe filled with spherical materials creating a packed bed. These materials are assumed to be manufactured in such a way that the spherical shape is uniform throughout the packed bed. Out of 32 candidate materials evaluated, 8 materials remain. Each material meets the Phase I milestones that were specified for this storage system: a round trip efficiency in excess of 93%, and a required volume of packed bed material that does not exceed the volume of molten salt used in a two-tank storage system with equivalent thermal performance.
Date: November 4, 2011
Creator: Newmarker, Marc & Campbell, Mark
Object Type: Report
System: The UNT Digital Library
2011 GASEOUS IONS GORDON RESEARCH CONFERENCE (open access)

2011 GASEOUS IONS GORDON RESEARCH CONFERENCE

The Gaseous Ions: Structures, Energetics and Reactions Gordon Research Conference will focus on ions and their interactions with molecules, surfaces, electrons, and light. The conference will cover theory and experiments, and systems ranging from molecular to biological to clusters to materials. The meeting goal continues to be bringing together scientists interested in fundamentals, with those applying fundamental phenomena to a wide range of practical problems. Each of the ten conference sessions will focus on a topic within this spectrum, and there will also be poster sessions for contributed papers, with sufficient space and time to allow all participants to present their latest results. To encourage active participation by young investigators, about ten of the poster abstracts will be selected for 15 minute 'hot topic' talks during the conference sessions. Hot topic selection will be done about a month before the meeting. Funds should be available to offset the participation cost for young investigators.
Date: March 4, 2011
Creator: Anderson, Scott
Object Type: Article
System: The UNT Digital Library
Ridge-Valley Graphs: Combinatorial Ridge Detection Using Jacobi Sets (open access)

Ridge-Valley Graphs: Combinatorial Ridge Detection Using Jacobi Sets

None
Date: February 4, 2011
Creator: Norgard, G & Bremer, P T
Object Type: Report
System: The UNT Digital Library
NON-LINEAR SEISMIC VELOCITY ESTIMATION FROM MULTIPLE WAVEFORM FUNCTIONALS AND FORMAL ASSESSMENT OF CONSTRAINTS (open access)

NON-LINEAR SEISMIC VELOCITY ESTIMATION FROM MULTIPLE WAVEFORM FUNCTIONALS AND FORMAL ASSESSMENT OF CONSTRAINTS

None
Date: August 4, 2011
Creator: Sen, M R; Pulliam, J; Dutta, U; Ghosh, R; Mellors, R & Pasyanos, M
Object Type: Article
System: The UNT Digital Library
2010 Atmospheric System Research (ASR) Science Team Meeting Summary (open access)

2010 Atmospheric System Research (ASR) Science Team Meeting Summary

This document contains the summaries of papers presented in poster format at the March 2010 Atmospheric System Research Science Team Meeting held in Bethesda, Maryland. More than 260 posters were presented during the Science Team Meeting. Posters were sorted into the following subject areas: aerosol-cloud-radiation interactions, aerosol properties, atmospheric state and surface, cloud properties, field campaigns, infrastructure and outreach, instruments, modeling, and radiation. To put these posters in context, the status of ASR at the time of the meeting is provided here.
Date: May 4, 2011
Creator: Dupont, D. L.
Object Type: Text
System: The UNT Digital Library
Coherent electron cooling demonstration experiment (open access)

Coherent electron cooling demonstration experiment

Coherent electron cooling (CEC) has a potential to significantly boost luminosity of high-energy, high-intensity hadron-hadron and electron-hadron colliders. In a CEC system, a hadron beam interacts with a cooling electron beam. A perturbation of the electron density caused by ions is amplified and fed back to the ions to reduce the energy spread and the emittance of the ion beam. To demonstrate the feasibility of CEC we propose a proof-of-principle experiment at RHIC using SRF linac. In this paper, we describe the setup for CeC installed into one of RHIC's interaction regions. We present results of analytical estimates and results of initial simulations of cooling a gold-ion beam at 40 GeV/u energy via CeC. We plan to complete the program in five years. During first two years we will build coherent electron cooler in IP2 of RHIC. In parallel we will develop complete package of computer simulation tools for the start-to-end simulation predicting exact performance of a CeC. The later activity will be the core of Tech X involvement into the project. We will use these tools to predict the performance of our CeC device. The experimental demonstration of the CeC will be undertaken in years three to five of …
Date: September 4, 2011
Creator: Litvinenko, V. N.; Belomestnykh, S.; Ben-Zvi, Ilan; Brutus, J. C.; Fedotov, A.; Hao, Y. et al.
Object Type: Article
System: The UNT Digital Library
PHOSPHATE MANAGEMENT: FY2010 RESULTS OF PHOSPHATE PRECIPITATION TESTS (open access)

PHOSPHATE MANAGEMENT: FY2010 RESULTS OF PHOSPHATE PRECIPITATION TESTS

The Phosphate Management program seeks to develop treatment options for caustic phosphate solutions resulting from the caustic leaching of the bismuth phosphate sludge. The SRNL subtask investigated the precipitation of phosphate salts from caustic solutions through addition of fluoride and by crystallization. The scoping tests examined the: precipitation of phosphate by the addition of sodium fluoride to form the sodium fluorophosphate double salt, Na{sub 7}F(PO{sub 4}){sub 2} {center_dot} 19H{sub 2}O, crystallization of phosphate by reducing the temperature of saturated phosphate solutions, and combinations of precipitation and crystallization. A simplified leachate simulant was used in the study produced by dissolving sodium phosphate in 1 M to 3.5 M sodium hydroxide solutions. The results show that all three processes; precipitation with sodium fluoride, crystallization, and combined precipitation/crystallization can be effective for removing large amounts of phosphate from solution. The combined process of precipitation/crystallization showed >90% removal of phosphate at all hydroxide concentrations when cooling a non-saturated phosphate solution from 65 C to 25 C. Based on the measured solubility of sodium phosphate, pH adjustment/caustic addition will also remove large amounts of phosphate from solution (>80%). For all three processes, the phosphate concentration in the caustic solution must be managed to keep the …
Date: April 4, 2011
Creator: Hay, M. & King, W.
Object Type: Report
System: The UNT Digital Library
Alternative Sodium Recovery Technology—High Hydroxide Leaching: FY10 Status Report (open access)

Alternative Sodium Recovery Technology—High Hydroxide Leaching: FY10 Status Report

Boehmite leaching tests were carried out at NaOH concentrations of 10 M and 12 M, temperatures of 85°C and 60°C, and a range of initial aluminate concentrations. These data, and data obtained during earlier 100°C tests using 1 M and 5 M NaOH, were used to establish the dependence of the boehmite dissolution rate on hydroxide concentration, temperature, and initial aluminate concentration. A semi-empirical kinetic model for boehmite leaching was fitted to the data and used to calculate the NaOH additions required for leaching at different hydroxide concentrations. The optimal NaOH concentration for boehmite leaching at 85°C was estimated, based on minimizing the amount of Na that had to be added in NaOH to produce a given boehmite conversion.
Date: February 4, 2011
Creator: Mahoney, Lenna A.; Neiner, Doinita; Peterson, Reid A.; Rapko, Brian M.; Russell, Renee L. & Schonewill, Philip P.
Object Type: Report
System: The UNT Digital Library
Experimental Study of Synchro-Betatron Coupling Induced By Dipole Modulation (open access)

Experimental Study of Synchro-Betatron Coupling Induced By Dipole Modulation

Synchro-betatron coupling in a proton storage ring with electron cooling was studied experimentally by modulating a transverse dipole field close to the synchrotron frequency. The combination of the electron cooling and transverse field modulation on the synchrotron oscillation is equivalent to a dissipative parametric resonant system. The proton bunch was observed to split longitudinally into two pieces, or beamlets, converging toward attractors of the dissipative system. These phenomena might be important in understanding the effect of ground vibration on the Superconducting Super Collider beam, and the effect of power supply ripple on the Relativistic Heavy-Ion Collider beam.
Date: November 4, 2011
Creator: Syphers, M.; Ball, M.; Brabson, B.; Budnick, J.; Caussyn, D. D.; Chao, A. W. et al.
Object Type: Article
System: The UNT Digital Library
Hydrogen Storage at Ambient Temperature by the Spillover Mechanism (open access)

Hydrogen Storage at Ambient Temperature by the Spillover Mechanism

The goal of this project was to develop new nanostructured sorbent materials, using the hydrogen spillover mechanism that could meet the DOE 2010 system targets for on-board vehicle hydrogen storage. Hydrogen spillover may be broadly defined as the transport (i.e., via surface diffusion) of dissociated hydrogen adsorbed or formed on a first surface onto another surface. The first surface is typically a metal (that dissociates H2) and the second surface is typically the support on which the metal is doped. Hydrogen spillover is a well documented phenomenon in the catalysis literature, and has been known in the catalysis community for over four decades, although it is still not well understood.1, 2 Much evidence has been shown in the literature on its roles played in catalytic reactions. Very little has been studied on hydrogen storage by spillover at ambient temperature. However, it is also known to occur at such temperature, e.g., direct evidence has been shown for spillover on commercial fuel-cell, highly dispersed Pt/C, Ru/C and PtRu/C catalysts by inelastic neutron scattering.3 To exploit spillover for storage, among the key questions are whether spillover is reversible at ambient temperature and if the adsorption (refill) and desorption rates at ambient temperature are …
Date: February 4, 2011
Creator: Yang , Ralph T.
Object Type: Report
System: The UNT Digital Library
ANALYSIS OF HARRELL MONOSODIUM TITANATE LOT #071311 (open access)

ANALYSIS OF HARRELL MONOSODIUM TITANATE LOT #071311

Monosodium titanate (MST) for use in the Actinide Removal Process (ARP) must be qualified and verified in advance. A single qualification sample for each batch of material is sent to SRNL for analysis, as well as a statistical sampling of verification samples. The Harrell Industries Lot No.071311 qualification and 12 verification samples met all the requirements in the specification indicating the material is acceptable for use in the process.
Date: October 4, 2011
Creator: Taylor-Pashow, K.
Object Type: Report
System: The UNT Digital Library
The Magnetic Centrifugal Mass Filter (open access)

The Magnetic Centrifugal Mass Filter

Mass filters using rotating plasmas have been considered for separating nuclear waste and spent nuclear fuel. We propose a new mass filter that utilizes centrifugal and magnetic confinement of ions in a way similar to the asymmetric centrifugal trap. This magnetic centrifugal mass filter is shown to be more proliferation resistant than present technology. This filter is collisional and produces well confined output streams, among other advantages. __________________________________________________
Date: August 4, 2011
Creator: Fisch, Abraham J. Fetterman and Nathaniel J.
Object Type: Report
System: The UNT Digital Library
FY 2010 Second Quarter Report Evaluation of the Liu-Daum-McGraw (LDM) Drizzle Threshold Parameterization using Measurements from the VAMOS Ocean-Cloud-Atmosphere Land Study (VOCALS) Field Campaign (open access)

FY 2010 Second Quarter Report Evaluation of the Liu-Daum-McGraw (LDM) Drizzle Threshold Parameterization using Measurements from the VAMOS Ocean-Cloud-Atmosphere Land Study (VOCALS) Field Campaign

Metric for Quarter 2: Evaluate LDM (Liu, Daum, McGraw) drizzle threshold parameterization for a range of cloud conditions by comparing the threshold function computed using measurements of cloud droplet number concentration and cloud liquid water content to measurements of drizzle droplet number concentrations and/or drizzle water content.
Date: April 4, 2011
Creator: McGraw, R.; Kleinman, L. L.; Springston, S. R.; Daum, P. H.; Senum, G. & Wang, J.
Object Type: Text
System: The UNT Digital Library
Transient evolution of a photon gas in the nonlinear QED vacuum (open access)

Transient evolution of a photon gas in the nonlinear QED vacuum

Thermally induced vacuum polarization stemming from QED radiative corrections to the electromagnetic field equations is studied. The physical behavior of thermal radiation, in the nonlinear QED vacuum first described by Heisenberg and Euler, is a problem of some theoretical importance in view of its relation to the cosmic microwave background (CMB), early universe evolution, and Hawking-Unruh radiation. The questions of evolution toward equilibrium, stability, and invariance of thermal radiation under such conditions are of great interest. Our analysis presents novel aspects associated with photon-photon scattering in a photon gas in the framework of quantum kinetic theory. Within the context of the Euler-Heisenberg theory, we show that a homogeneous, isotropic photon gas with arbitrary spectral distribution function evolves toward an equilibrium state with a Bose-Einstein distribution. The transient evolution toward equilibrium of a gas of photons undergoing photon-photon scattering is studied in detail via the Boltzmann transport equation.
Date: October 4, 2011
Creator: Wu, S Q & Hartemann, F V
Object Type: Report
System: The UNT Digital Library