Energy Recovery Linac: 5 Cell 704 MHz SRF Cavity (open access)

Energy Recovery Linac: 5 Cell 704 MHz SRF Cavity

N/A
Date: January 1, 2010
Creator: A., Burrill
Object Type: Report
System: The UNT Digital Library
Low-Cost Flexible Electrochromic Film for Energy Efficient Buildings (open access)

Low-Cost Flexible Electrochromic Film for Energy Efficient Buildings

Broad Funding Opportunity Announcement Project: ITN is addressing the high cost of electrochromic windows with a new manufacturing process: roll-to-roll deposition of the film onto flexible plastic surfaces. Production of electrochromic films on plastic requires low processing temperatures and uniform film quality over large surface areas. ITN is overcoming these challenges using its previous experience in growing flexible thin-film solar cells and batteries. By developing sensor-based controls, ITN’s roll-to-roll manufacturing process yields more film over a larger area than traditional film deposition methods. Evaluating deposition processes from a control standpoint ultimately strengthens the ability for ITN to handle unanticipated deviations quickly and efficiently, enabling more consistent large-volume production. The team is currently moving from small-scale prototypes into pilot-scale production to validate roll-to-roll manufacturability and produce scaled prototypes that can be proven in simulated operating conditions. Electrochromic plastic films could also open new markets in building retrofit applications, vastly expanding the potential energy savings.
Date: January 1, 2010
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Energy Recovery Linac: Controls System (open access)

Energy Recovery Linac: Controls System

N/A
Date: January 1, 2010
Creator: L., Hoff & Jamilkowski, J.
Object Type: Report
System: The UNT Digital Library
R&D ERL: Controls System (open access)

R&D ERL: Controls System

This paper examines the equipment and software from which the controls system interface for the Energy Recovery Linac (ERL) will be implemented at the Brookhaven National Laboratory.
Date: January 1, 2010
Creator: Hoff, L. & Jamilkowski, J.
Object Type: Report
System: The UNT Digital Library
Hanford Tank Farms Waste Certification Flow Loop Test Plan (open access)

Hanford Tank Farms Waste Certification Flow Loop Test Plan

A future requirement of Hanford Tank Farm operations will involve transfer of wastes from double shell tanks to the Waste Treatment Plant. As the U.S. Department of Energy contractor for Tank Farm Operations, Washington River Protection Solutions anticipates the need to certify that waste transfers comply with contractual requirements. This test plan describes the approach for evaluating several instruments that have potential to detect the onset of flow stratification and critical suspension velocity. The testing will be conducted in an existing pipe loop in Pacific Northwest National Laboratory’s facility that is being modified to accommodate the testing of instruments over a range of simulated waste properties and flow conditions. The testing phases, test matrix and types of simulants needed and the range of testing conditions required to evaluate the instruments are described
Date: January 1, 2010
Creator: Bamberger, Judith A.; Meyer, Perry A.; Scott, Paul A.; Adkins, Harold E.; Wells, Beric E.; Blanchard, Jeremy et al.
Object Type: Report
System: The UNT Digital Library
Planning Guide for Vaccinating Pediatric Patients Against H1N1 Influenza in Private Healthcare Settings (open access)

Planning Guide for Vaccinating Pediatric Patients Against H1N1 Influenza in Private Healthcare Settings

The purpose of this document is to provide guidance for planning and conducting 2009 H1N1 Influenza vaccination of pediatric patients in private healthcare settings.
Date: January 1, 2010
Creator: CHE, HCTT
Object Type: Article
System: The UNT Digital Library
Latest results from the MINOS experiment (open access)

Latest results from the MINOS experiment

The MINOS experiment utilizes the NuMI neutrino beam to study the phenomenon of neutrino oscillations. Muon neutrinos are sent over a baseline of 735 km, with a detector near the production point at Fermilab and one at the Soudan underground laboratory in northern Minnesota. By observing the {nu}{sub {mu}} disappearance characteristic of oscillations, MINOS can measure the oscillation parameters. MINOS has previously made the best measurement of the atmospheric-regime mass splitting to date. New results are presented in which the data-set is doubled. Further analysis improvements, and the inclusion of additional event samples, further improve the sensitivity to the oscillation parameters. The mixing angle {theta}{sub 13} is currently not measured to differ from zero. By searching for {nu}{sub e} appearance in the {nu}{sub {mu}} beam, MINOS is able to set new limits on the value of {theta}{sub 13}. An observation of the neutral current interaction rate at the far detector allows limits to be placed on the existence of sterile neutrinos. From September 2009 to March 2010, MINOS has taken data with a dedicated {bar {nu}}{sub {mu}} beam, allowing the first direct precision measurement of the antineutrino oscillation parameters in the atmospheric regime.
Date: January 1, 2010
Creator: Evans, Justin & London, /University Coll.
Object Type: Article
System: The UNT Digital Library
Standard model high mass Higgs search at CDF (open access)

Standard model high mass Higgs search at CDF

The CDF collaboration has analyzed almost 6 f b{sup -1} of data collected at the Tevatron Collider at {radical}{ovr s} = 1.96 TeV to search for Standard Model Higgs boson through the decay into W{sup +}W{sup -}*. Starting from events with two leptons, advanced analysis techniques are applied to better discriminate signal from background. The Higgs sensitivity is maximized combining together analysis that exploit different event topologies. No significant excess over the expected background is observed and data is used to set a limit in units of Standard Model expectations. The limit plays a fundamental role in the Higgs search excluding the existence of this particle with mass between 158 and 175 GeV/c{sup 2} when combined with D0, the other Tevatron experiment.
Date: January 1, 2010
Creator: Lucchesi, Donatella
Object Type: Article
System: The UNT Digital Library
R&D ERL: HTS Solenoid (open access)

R&D ERL: HTS Solenoid

An innovative feature of the ERL project is the use of a solenoid made with High Temperature Superconductor (HTS) with the Superconducting RF cavity. The HTS solenoid design offers many advantages because of several unique design features. Typically the solenoid is placed outside the cryostat which means that the beam gets significantly defused before a focusing element starts. In the current design, the solenoid is placed inside the cryostat which provides an early focusing structure and thus a significant reduction in the emittance of the electron beam. In addition, taking full advantage of the high critical temperature of HTS, the solenoid has been designed to reach the required field at {approx}77 K, which can be obtained with liquid nitrogen. This significantly reduces the cost of testing and allows a variety of critical pre-tests which would have been prohibitively expensive at 4 K in liquid helium because of the additional requirements of cryostat and associated facilities.
Date: January 1, 2010
Creator: Gupta, R.; Muratore, J. & Plate, S.
Object Type: Report
System: The UNT Digital Library
Laser Interactions in Nanomaterials Synthesis (open access)

Laser Interactions in Nanomaterials Synthesis

Laser interactions with materials have unique advantages to explore the rapid synthesis, processing, and in situ characterization of high quality and novel nanoparticles, nanotubes and nanowires. For example, laser vaporization of solids into background gases provides a wide range of processing conditions for the formation of nanomaterials by both catalyst-free and catalyst-assisted growth processes. Laser interactions with the growing nanomaterials provide remote in situ characterization of their size, structure, and composition with unprecedented temporal resolution. In this article, laser interactions involved in the synthesis of primarily carbon nanostructures are reviewed, including the catalyst-free synthesis of single-walled carbon nanohorns and quantum dots, to the catalyst-assisted growth of single and multi-walled carbon nanotubes.
Date: January 1, 2010
Creator: Geohegan, David B.; Puretzky, Alexander A.; Rouleau, Christopher M.; Jackson, Jeremy Joseph; Eres, Gyula; Xiao, Kai et al.
Object Type: Book
System: The UNT Digital Library
Measurement of Interfacial Area Production and Permeability within Porous Media (open access)

Measurement of Interfacial Area Production and Permeability within Porous Media

An understanding of the pore-level interactions that affect multi-phase flow in porous media is important in many subsurface engineering applications, including enhanced oil recovery, remediation of dense non-aqueous liquid contaminated sites, and geologic CO2 sequestration. Standard models of two-phase flow in porous media have been shown to have several shortcomings, which might partially be overcome using a recently developed model based on thermodynamic principles that includes interfacial area as an additional parameter. A few static experimental studies have been previously performed, which allowed the determination of static parameters of the model, but no information exists concerning the interfacial area dynamic parameters. A new experimental porous flow cell that was constructed using stereolithography for two-phase gas-liquid flow studies was used in conjunction with an in-house analysis code to provide information on dynamic evolution of both fluid phases and gas-liquid interfaces. In this paper, we give a brief introduction to the new generalized model of two-phase flow model and describe how the stereolithography flow cell experimental setup was used to obtain the dynamic parameters for the interfacial area numerical model. In particular, the methods used to determine the interfacial area permeability and production terms are shown.
Date: January 1, 2010
Creator: Crandall, Dustin; Ahmadi, Goodarz & Smith, Duane H.
Object Type: Article
System: The UNT Digital Library
Heat Pipe Embedded AlSiC Plates for High Conductivity - Low CTE Heat Spreaders (open access)

Heat Pipe Embedded AlSiC Plates for High Conductivity - Low CTE Heat Spreaders

Heat pipe embedded aluminum silicon carbide (AlSiC) plates are innovative heat spreaders that provide high thermal conductivity and low coefficient of thermal expansion (CTE). Since heat pipes are two phase devices, they demonstrate effective thermal conductivities ranging between 50,000 and 200,000 W/m-K, depending on the heat pipe length. Installing heat pipes into an AlSiC plate dramatically increases the plate’s effective thermal conductivity. AlSiC plates alone have a thermal conductivity of roughly 200 W/m-K and a CTE ranging from 7-12 ppm/ deg C, similar to that of silicon. An equivalent sized heat pipe embedded AlSiC plate has effective thermal conductivity ranging from 400 to 500 W/m-K and retains the CTE of AlSiC.
Date: January 7, 2010
Creator: Johnson, Matthew; Weyant, J.; Garner, S. & Occhionero, M.
Object Type: Article
System: The UNT Digital Library
Laser-Mechanical Drilling for Geothermal Energy: Low-Contact Drilling Technology to Enable Economical EGS Wells (open access)

Laser-Mechanical Drilling for Geothermal Energy: Low-Contact Drilling Technology to Enable Economical EGS Wells

Broad Funding Opportunity Announcement Project: Foro Energy is developing a unique capability and hardware system to transmit high power lasers over long distances via fiber optic cables. This laser power is integrated with a mechanical drilling bit to enable rapid and sustained penetration of hard rock formations too costly to drill with mechanical drilling bits alone. The laser energy that is directed at the rock basically softens the rock, allowing the mechanical bit to more easily remove it. Foro Energy’s laser-assisted drill bits have the potential to be up to 10 times more economical than conventional hard-rock drilling technologies, making them an effective way to access the U.S. energy resources currently locked under hard rock formations.
Date: January 15, 2010
Creator: unknown
Object Type: Text
System: The UNT Digital Library
Minimum bias and underlying event studies at CDF (open access)

Minimum bias and underlying event studies at CDF

Soft, non-perturbative, interactions are poorly understood from the theoretical point of view even though they form a large part of the hadronic cross section at the energies now available. We review the CDF studies on minimum-bias ad underlying event in p{bar p} collisions at 2 TeV. After proposing an operative definition of 'underlying event', we present part of a systematic set of measurements carried out by the CDF Collaboration with the goal to provide data to test and improve the QCD models of hadron collisions. Different analysis strategies of the underlying event and possible event topologies are discussed. Part of the CDF minimum-bias results are also presented: in this sample, that represent the full inelastic cross-section, we can test simultaneously our knowledge of all the components that concur to form hadronic interactions. Comparisons with MonteCarlo simulations are always shown along with the data. These measurements will also contribute to more precise estimates of the soft QCD background of high-p{sub T} observables.
Date: January 1, 2010
Creator: Moggi, Niccolo & /INFN, Bologna
Object Type: Article
System: The UNT Digital Library
Second Line of Defense Megaports Initiative Operational Testing and Evaluation Plan Colon Container Terminal (CCT) Panama (open access)

Second Line of Defense Megaports Initiative Operational Testing and Evaluation Plan Colon Container Terminal (CCT) Panama

Report on the Operational Testing and Evaluation to validate and baseline an operable system that meets the Second Line of Defense (SLD) mission requirements. An SLD system is defined as the detection technology and associated equipment, the system operators from the host country, the standard operating procedures (SOPs), and other elements such as training and maintenance which support long-term system sustainment. To this end, the activities conducted during the OT&E phase must demonstrate that the Megaports System can be operated effectively in real-time by Panama Direccion General de Aduanas (DGA Panama Customs) personnel to the standards of the U.S. Department of Energy/National Nuclear Security Administration (DOE/NNSA).
Date: January 1, 2010
Creator: Newhouse, Robert N.
Object Type: Report
System: The UNT Digital Library
Search for new physics in the dijet mass spectrum and dijet ratio in p p collisions at s**(1/2) = 7-TeV (open access)

Search for new physics in the dijet mass spectrum and dijet ratio in p p collisions at s**(1/2) = 7-TeV

A search for new Physics is performed with inclusive dijet final states in pp collisions, using data corresponding to an integrated luminosity of 120 {+-} 13 nb{sup -1} collected by the CMS experiment at LHC. Generic upper limits at the 95% confidence level (CL) are presented on the product of the resonance cross section, branching fraction into dijets, and acceptance, separately for decays into quark-quark, quark-gluon, or gluon-gluon pairs. The data exclude new particles predicted in the following models at the 95% CL: string resonances, with mass less than 1.67 TeV, excited quarks, with mass less than 0.59 TeV and axigluons and colorons with mass less than 0.52 TeV. A search for quark compositeness in the form of quark contact interactions is conducted using the dijet centrality ratio, which quantifies the angular distribution of the dijets. The measurement is found to agree with the predictions of the Standard Model and the statistical analysis of the data provides a lower limit on the energy scale of quark contact interactions of 1.9 TeV at the 95% confidence level. The above results extend previously published limits on these models.
Date: January 1, 2010
Creator: Kousouris, Konstantinos
Object Type: Article
System: The UNT Digital Library
Understanding enzyme catalysis using computer simulation (open access)

Understanding enzyme catalysis using computer simulation

Enzymes catalyze biochemical reactions with remarkable specificity and efficiency, usually under physiological conditions. Computer simulation is a powerful tool for understanding enzyme catalytic mechanisms, particularly in cases where standard experimental techniques may be of limited utility. Here, we present an overview of the application of computer simulation techniques to understanding enzyme catalytic mechanisms. Examples using quantum chemical methods, as well as combined quantum mechanical/classical mechanical approaches, are provided.
Date: January 1, 2010
Creator: Parks, Jerry M; Imhof, Petra & Smith, Jeremy C
Object Type: Book
System: The UNT Digital Library
Measurement of W and Z properties at the Tevatron (open access)

Measurement of W and Z properties at the Tevatron

The very large sample of proton-antiproton data collected at the Tevatron at {radical}s = 1.96 TeV, allows the two full purpose experiment CDF and D0 to study in detail the properties of W and Z bosons and to exploit them to study high-energy interactions. The very large samples of vector bosons allow also accurate measurement of S.M. parameters which help constrain models of new physics. Last but not least, the W mass, related to the EWSB sector, can help in the long lasting search for the Higgs particle.
Date: January 1, 2010
Creator: Chiarelli, Giorgio
Object Type: Article
System: The UNT Digital Library
Final Report: Human Capacity Building Grant for Renewable Energy Development (open access)

Final Report: Human Capacity Building Grant for Renewable Energy Development

Warm Springs Power and Water Enterprise (WSPWE), a Corporate Entity of the Confederated Tribes of Warm Springs Oregon, developed and distributed written materials, held workshops and field trips to educate tribal members on renewable energy projects that are a possibility utilizing resources on reservation. In order to build stronger public and Tribal Council support for the development of renewable energy projects on the reservation, WSPWE conducted a 12 month public education and technical expertise development program. The objectives of this program were to: • To build a knowledge base within the tribal community regarding renewable energy development potential and opportunities on reservation lands. • To educate the tribal community regarding development process, impacts and benefits. • To increase the technical expertise of tribal government and Tribal Council.
Date: January 3, 2010
Creator: Sando, Wil
Object Type: Report
System: The UNT Digital Library
Summary report of working group 5: Beam and radiation generation, monitoring, and control (open access)

Summary report of working group 5: Beam and radiation generation, monitoring, and control

This paper summarizes the activities and presentations of Working Group 5 of the Advanced Accelerator Concepts Workshop held at Annapolis, Maryland in June 2010. Working Group 5 touched on a broad range of topics in the fields of beam and radiation generation and their monitoring and control. These topics were not comprehensively covered in this Workshop, but rather the Working Group concentrated on specific new developments and recent investigations. The Working Group divided its sessions into four broad categories: cathodes and electron guns, radiation generation, beam diagnostics, and beam control and dynamics. This summary is divided into the same structure.
Date: January 1, 2010
Creator: Church, Mike & Kim, Ki-Yong
Object Type: Article
System: The UNT Digital Library
Measurement of the top quark mass at D0 (open access)

Measurement of the top quark mass at D0

The most recent measurements of the mass of the quark top at D0 are reviewed. The analysis methods include the direct measurement by Matrix Element and Weighting method and the indirect measurement from t{bar t} production cross section. They have been applied on different experimental signatures, all including at least one electron or muon. Measurements include from 1 to 3.6 fb{sup -1} of D0 data. The most recent combination of mass measurements from D0 and from CDF are also quoted.
Date: January 1, 2010
Creator: Petrillo, Gianluca
Object Type: Article
System: The UNT Digital Library
Terrestrial biogeochemical feedbacks in the climate system: from past to future (open access)

Terrestrial biogeochemical feedbacks in the climate system: from past to future

The terrestrial biosphere plays a major role in the regulation of atmospheric composition, and hence climate, through multiple interlinked biogeochemical cycles (BGC). Ice-core and other palaeoenvironmental records show a fast response of vegetation cover and exchanges with the atmosphere to past climate change, although the phasing of these responses reflects spatial patterning and complex interactions between individual biospheric feedbacks. Modern observations show a similar responsiveness of terrestrial biogeochemical cycles to anthropogenically-forced climate changes and air pollution, with equally complex feedbacks. For future conditions, although carbon cycle-climate interactions have been a major focus, other BGC feedbacks could be as important in modulating climate changes. The additional radiative forcing from terrestrial BGC feedbacks other than those conventionally attributed to the carbon cycle is in the range of 0.6 to 1.6 Wm{sup -2}; all taken together we estimate a possible maximum of around 3 Wm{sup -2} towards the end of the 21st century. There are large uncertainties associated with these estimates but, given that the majority of BGC feedbacks result in a positive forcing because of the fundamental link between metabolic stimulation and increasing temperature, improved quantification of these feedbacks and their incorporation in earth system models is necessary in order to develop …
Date: January 5, 2010
Creator: Arneth, A.; Harrison, S. P.; Zaehle, S.; Tsigaridis, K.; Menon, S.; Bartlein, P. J. et al.
Object Type: Article
System: The UNT Digital Library
Precision measurements of the top quark mass and width with the D0 detector (open access)

Precision measurements of the top quark mass and width with the D0 detector

Since the discovery of the top quark in 1995 at the Fermliab Tevatron Collider, top quark properties have been measured with ever higher precision. In this article, recent measurements of the top quark mass and its width using up to 3.6 fb{sup -1} of D0 data are summarized. Different techniques and final states have been examined and no deviations within these measurements have been observed. In addition to the direct measurements, a measurement of the top quark mass from its production cross section and a measurement of the top-antitop quark mass difference are discussed. With a mass of 173.3 {+-} 1.1 GeV, the top quark is the heaviest of all known fundamental particles. Due to the high mass, its Yukawa coupling is close to unity suggesting that it may play a special role in electroweak symmetry breaking. Precise measurements of both, the W boson and the top quark mass, constrain the mass of the yet unobserved Higgs boson and allow to restrict certain extensions of the Standard Model. At the Tevatron collider with a center-of-mass energy of 1.96 TeV, 85% of the top quark pairs are produced in quark-antiquark annihilation; 15% originate from gluon fusion. Top quarks are predicted to …
Date: January 1, 2010
Creator: Grohsjean, Alexander & /IRFU, SPP, Saclay
Object Type: Article
System: The UNT Digital Library
The Neutral kaon mixing parameter B(K) from unquenched mixed-action lattice QCD (open access)

The Neutral kaon mixing parameter B(K) from unquenched mixed-action lattice QCD

We calculate the neutral kaon mixing parameter B{sub K} in unquenched lattice QCD using asqtad-improved staggered sea quarks and domain-wall valence quarks. We use the '2+1' flavor gauge configurations generated by the MILC Collaboration, and simulate with multiple valence and sea quark masses at two lattice spacings of a {approx} 0.12 fm and a {approx} 0.09 fm. We match the lattice determination of B{sub K} to the continuum value using the nonperturbative method of Rome-Southampton, and extrapolate B{sub K} to the continuum and physical quark masses using mixed action chiral perturbation theory. The 'mixed-action' method enables us to control all sources of systematic uncertainty and therefore to precisely determine B{sub K}; we find a value of B{sub K}{sup {ovr MS},NDR} (2 GeV) = 0.527(6)(21), where the first error is statistical and the second is systematic.
Date: January 1, 2010
Creator: Christopher Aubin, Jack Laiho, Ruth S. Van de Water
Object Type: Article
System: The UNT Digital Library