The Future of the Eurozone and U.S. Interests (open access)

The Future of the Eurozone and U.S. Interests

This report details the consequences of the European financial crisis of 2010 beginning with the economic fallout of the Greek economy. It then highlights six factors that would be instrumental regarding the "Eurozones" future.
Date: September 14, 2010
Creator: Ahearn, Raymond J.; Jackson, James K.; Nelson, Rebecca M. & Weiss, Martin A.
Object Type: Report
System: The UNT Digital Library
Running Deficits: Positives and Pitfalls (open access)

Running Deficits: Positives and Pitfalls

The FY2009 federal deficit swelled to $1.414 trillion, or nearly 10% of gross domestic product (GDP), due to the economic recession. The size of recent deficits has added to longstanding concerns regarding the federal government's long-term fiscal condition. However, deficit finance can serve as an important policy tool. This report discusses how deficit finance can help governments manage their economies and how large and persistent deficits can lead to severe economic problems.
Date: September 14, 2010
Creator: Austin, D. Andrew
Object Type: Report
System: The UNT Digital Library
Precise Predictions for W 4 Jet Production at the Large Hadron Collider (open access)

Precise Predictions for W 4 Jet Production at the Large Hadron Collider

We present the first next-to-leading order QCD results for W + 4-jet production at hadron colliders. Total cross sections, as well as distributions in the jet transverse momenta and in the total transverse energy HT, are provided for the initial LHC energy of {radical}s = 7 TeV. We use a leading-color approximation, known to be accurate to 3% for W production with fewer jets. The virtual matrix elements and the most complicated real-emission matrix elements are handled by the BlackHat library, based on on-shell methods. The remaining parts of the calculation, including the integration over phase space, are performed by the SHERPA package.
Date: September 14, 2010
Creator: Berger, C.F.; /MIT, LNS; Bern, Z.; /UCLA; Dixon, Lance J.; /SLAC, /CERN et al.
Object Type: Article
System: The UNT Digital Library
Afghanistan Casualties: Military Forces and Civilians (open access)

Afghanistan Casualties: Military Forces and Civilians

This report collects statistics from a variety of sources on casualties sustained during Operation Enduring Freedom (OEF), which began on October 7, 2001. OEF actions took place primarily in Afghanistan, but OEF casualties also include American casualties in other countries, listed within this report.
Date: September 14, 2010
Creator: Chesser, Susan G.
Object Type: Report
System: The UNT Digital Library
CO2 Removal using a Synthetic Analogue of Carbonic Anhydrase (open access)

CO2 Removal using a Synthetic Analogue of Carbonic Anhydrase

Project attempts to develop a synthetic analogue for carbonic anhydrase and incorporate it in a membrane for separation of CO2 from coal power plant flue gas. Conference poster presents result of first 9 months of project progress including concept, basic system architecture and membrane properties target, results of molecular modeling for analogue - CO2 interaction, and next steps of testing analogue resistance to flue gas contaminants.
Date: September 14, 2010
Creator: Cordatos, Harry
Object Type: Article
System: The UNT Digital Library
Saving Rates in the United States: Calculation and Comparison (open access)

Saving Rates in the United States: Calculation and Comparison

The amount of money saved has important economic consequences. Nationally, the amount of saving affects how much can be invested and ultimately the size of the capital stock. This report explains how national saving is measured, presents recent estimates of saving rates in the United States, and, for comparison, provides those of other major industrial countries.
Date: September 14, 2010
Creator: Elwell, Craig K.
Object Type: Report
System: The UNT Digital Library
LLNL's Precision Compton Scattering Light Source (open access)

LLNL's Precision Compton Scattering Light Source

None
Date: September 14, 2010
Creator: Hartemann, F.; Albert, F.; Anderson, S.; Bayramian, A.; Cross, R.; Ebbers, C. et al.
Object Type: Article
System: The UNT Digital Library
U.S. Trade Deficit and the Impact of Changing Oil Prices (open access)

U.S. Trade Deficit and the Impact of Changing Oil Prices

This report provides an estimate of the initial impact of the changing oil prices on the nation's merchandise trade deficit.
Date: September 14, 2010
Creator: Jackson, James K.
Object Type: Report
System: The UNT Digital Library
Afghanistan: Politics, Elections, and Government Performance (open access)

Afghanistan: Politics, Elections, and Government Performance

This report discusses the current political state of Afghanistan, as well as the Afghan government. This report also discusses Afghanistan's relationship with the United States, particularly U.S. efforts to urge President Hamid Karzai to address corruption within the Afghan government.
Date: September 14, 2010
Creator: Katzman, Kenneth
Object Type: Report
System: The UNT Digital Library
Design of the Second-Generation ILC Marx Modulator (open access)

Design of the Second-Generation ILC Marx Modulator

SLAC National Accelerator Laboratory (SLAC) has initiated a program to design and build a Marx-topology modulator to produce a relatively compact, low-cost, high availability klystron modulator for the International Linear Collider (ILC). Building upon the success of the P1 Marx, the SLAC P2 Marx is a second-generation modulator whose design further emphasizes the qualities of modularity and high-availability. This paper outlines highlights of this design and presents single-cell performance data obtained during the proof-of-concept phase of the project.
Date: September 14, 2010
Creator: Kemp, M. A.; Benwell, A.; Burkhart, C.; Larsen, R.; MacNair, D.; Nguyen, M. et al.
Object Type: Article
System: The UNT Digital Library
Investigating Chemical and Molecular Changes in Uranium Oxyfluoride Particles using NanoSIMS and Micro-Raman Spectroscopy (open access)

Investigating Chemical and Molecular Changes in Uranium Oxyfluoride Particles using NanoSIMS and Micro-Raman Spectroscopy

None
Date: September 14, 2010
Creator: Kips, R.; Kristo, M. J.; Crowhurst, J.; Hutcheon, I. D.; Stefaniak, E. A. & Aregbe, Y.
Object Type: Article
System: The UNT Digital Library
Development of a System for Rapid Detection of Contaminants in Water Supplies Using Magnetic Resonance and Nanoparticles (open access)

Development of a System for Rapid Detection of Contaminants in Water Supplies Using Magnetic Resonance and Nanoparticles

To keep the water supply safe and to ensure a swift and accurate response to a water supply contamination event, rapid and robust methods for microbial testing are necessary. Current technologies are complex, lengthy and costly and there is a need for rapid, reliable, and precise approaches that can readily address this fundamental security and safety issue. T2 Biosystems is focused on providing solutions to this problem by making breakthroughs in nanotechnology and biosensor techniques that address the current technical restrictions facing rapid, molecular analysis in complex samples. In order to apply the T2 Biosystems nucleic acid detection procedure to the analysis of nucleic acid targets in unprocessed water samples, Bacillus thuringeinsis was selected as a model organism and local river water was selected as the sample matrix. The initial assay reagent formulation was conceived with a manual magnetic resonance reader, was optimized using a high throughput system, and transferred back to the MR reader for potential field use. The final assay employing the designed and manufactured instruments was capable of detecting 10 CFU/mL of B. thuringiensis directly within the environmental water sample within 90 minutes. Further, discrimination of two closely related species of Bacilli was accomplished using the methods …
Date: September 14, 2010
Creator: Lowery, Thomas J; Neely, Lori; Chepin, James; Wellman, Parris; Toso, Ken; Murray, Paul et al.
Object Type: Report
System: The UNT Digital Library
Rules and Practices Governing Consideration of Revenue Legislation in the House and Senate (open access)

Rules and Practices Governing Consideration of Revenue Legislation in the House and Senate

This report provides an overview and analysis of the most consequential revenue-specific rules that apply during the process of developing and considering revenue legislation.
Date: September 14, 2010
Creator: Lynch, Megan S.
Object Type: Report
System: The UNT Digital Library
State Efforts to Deter Unauthorized Aliens: Legal Analysis of Arizona's S.B. 1070 (open access)

State Efforts to Deter Unauthorized Aliens: Legal Analysis of Arizona's S.B. 1070

On April 23, 2010, Arizona enacted S.B. 1070, which is designed to discourage and deter the entry or presence of aliens who lack lawful status under federal immigration law. This report discusses this piece of legislation and some of the notable preemption issues raised by its provisions. Where relevant, it examines the district court's ruling that the federal government is likely to succeed on the merits of its arguments that certain sections of S.B. 1070 are preempted by federal law. It also discusses other preemption issues potentially raised by S.B. 1070 or similar legislation, including some issues that were not expressly addressed by the district court in its preliminary ruling.
Date: September 14, 2010
Creator: Manuel, Kate M.; Garcia, Michael John & Eig, Larry M.
Object Type: Report
System: The UNT Digital Library
State Efforts to Deter Unauthorized Aliens: Legal Analysis of Arizona's S.B. 1070 (open access)

State Efforts to Deter Unauthorized Aliens: Legal Analysis of Arizona's S.B. 1070

This report discusses S.B. 1070 and some of the notable preemption issues raised by some of its provisions. Where relevant, it examines the district court's ruling that the federal government is likely to succeed on the merits of its arguments that certain sections of S.B. 1070 are preempted by federal law. It also discusses other preemption issues potentially raised by S.B. 1070 or similar legislation, including some issues that were not expressly addressed by the district court in its preliminary ruling.
Date: September 14, 2010
Creator: Manuel, Kate M.; Garcia, Michael John & Eig, Larry M.
Object Type: Report
System: The UNT Digital Library
LHC RF System Time-Domain Simulation (open access)

LHC RF System Time-Domain Simulation

Non-linear time-domain simulations have been developed for the Positron-Electron Project (PEP-II) and the Large Hadron Collider (LHC). These simulations capture the dynamic behavior of the RF station-beam interaction and are structured to reproduce the technical characteristics of the system (noise contributions, non-linear elements, and more). As such, they provide useful results and insight for the development and design of future LLRF feedback systems. They are also a valuable tool for the study of diverse longitudinal beam dynamics effects such as coupled-bunch impedance driven instabilities and single bunch longitudinal emittance growth. Results from these studies and related measurements from PEP-II and LHC have been presented in multiple places. This report presents an example of the time-domain simulation implementation for the LHC.
Date: September 14, 2010
Creator: Mastorides, T. & Rivetta, C.
Object Type: Report
System: The UNT Digital Library
LHC Beam Diffusion Dependence on RF Noise: Models And Measurements (open access)

LHC Beam Diffusion Dependence on RF Noise: Models And Measurements

Radio Frequency (RF) accelerating system noise and non-idealities can have detrimental impact on the LHC performance through longitudinal motion and longitudinal emittance growth. A theoretical formalism has been developed to relate the beam and RF loop dynamics with the bunch length growth [1]. Measurements were conducted at LHC to validate the formalism, determine the performance limiting RF components, and provide the foundation for beam diffusion estimates for higher energies and intensities. A brief summary of these results is presented in this work. During a long store, the relation between the energy lost to synchrotron radiation and the noise injected to the beam by the RF accelerating voltage determines the growth of the bunch energy spread and longitudinal emittance. Since the proton synchrotron radiation in the LHC is very low, the beam diffusion is extremely sensitive to RF perturbations. The theoretical formalism presented in [1], suggests that the noise experienced by the beam depends on the cavity phase noise power spectrum, filtered by the beam transfer function, and aliased due to the periodic sampling of the accelerating voltage signal V{sub c}. Additionally, the dependence of the RF accelerating cavity noise spectrum on the Low Level RF (LLRF) configurations has been predicted …
Date: September 14, 2010
Creator: Mastorides, T.; Rivetta, C.; Fox, J. D.; Van Winkle, D.; Baudrenghien, P.; Butterworth, A. et al.
Object Type: Article
System: The UNT Digital Library
Silicide Characterization at Alumina-Niobium Interfaces (open access)

Silicide Characterization at Alumina-Niobium Interfaces

None
Date: September 14, 2010
Creator: McKeown, J T; Radmilovic, V R; Gronsky, R & Glaeser, A M
Object Type: Article
System: The UNT Digital Library
Ab Initio Theory of Light-Ion Reactions (open access)

Ab Initio Theory of Light-Ion Reactions

None
Date: September 14, 2010
Creator: Navratil, P; Quaglioni, S & Roth, R
Object Type: Article
System: The UNT Digital Library
Algorithm for Computation of Electromagnetic Fields of An Accelerated Short Bunch Inside a Rectangular Chamber (open access)

Algorithm for Computation of Electromagnetic Fields of An Accelerated Short Bunch Inside a Rectangular Chamber

We discuss the feasibility of an application of an implicit finite-difference approximation to calculate the fields of a relativistic bunch moving with no restriction inside a vacuum chamber. We assume that a bunch trajectory is not straight but is inside a vacuum chamber or its branch. The bunch can be deflected by the fields of bending magnets. The bunch can be short enough to produce coherent synchrotron radiation (CSR). Accelerator physicists believe that electromagnetic phenomena of charged beams are governed by Maxwell's equations together with Newton's equations for particle dynamics. To understand the behavior of the beams and radiated fields we just need to find a solution to these equations for the case, which can fully describe the real accelerator environment. So, at first we make a model, which contains all the necessary components, but at the same time can be easily 'inserts' into the equations. Sometimes, it is possible to find analytical solutions, but usually they are only work for one-dimensional cases and rarer for two-dimension cases. To find a solution in general we may transform the equations into a equivalent finite-difference form and solve them using computers. We can find a lot of finite-difference schemes, which approximate Maxwell's …
Date: September 14, 2010
Creator: Novokhatski, Alexander & Sullivan, Michael
Object Type: Article
System: The UNT Digital Library
Characterization of Second Harmonic Afterburner Radiation at the LCLS (open access)

Characterization of Second Harmonic Afterburner Radiation at the LCLS

During commissioning of the Linac Coherent Light Source (LCLS) x-ray Free Electron Laser (FEL) at the SLAC National Accelerator Laboratory it was shown that saturation lengths much shorter than the installed length of the undulator line can routinely be achieved. This frees undulator segments that can be used to provide enhanced spectral properties and at the same time, test the concept of FEL Afterburners. In December 2009 a project was initiated to convert undulator segments at the down-beam end of the undulator line into Second Harmonic Afterburners (SHAB) to enhance LCLS radiation levels in the 10-20 keV energy range. This is being accomplished by replacement of gap-shims increasing the fixed gaps from 6.8 mm to 9.9 mm, which reduces their K values from 3.50 to 2.25 and makes the segments resonant at the second harmonic of the upstream unmodified undulators. This paper reports experimental results of the commissioning of the SHAB extension to LCLS.
Date: September 14, 2010
Creator: Nuhn, Heinz-Dieter
Object Type: Article
System: The UNT Digital Library
Application for a Permit to Operate a Class III Solid Waste Disposal Site at the Nevada Test Site Area 5 Asbestiform Low-Level Solid Waste Disposal Site (open access)

Application for a Permit to Operate a Class III Solid Waste Disposal Site at the Nevada Test Site Area 5 Asbestiform Low-Level Solid Waste Disposal Site

The NTS solid waste disposal sites must be permitted by the state of Nevada Solid Waste Management Authority (SWMA). The SWMA for the NTS is the Nevada Division of Environmental Protection, Bureau of Federal Facilities (NDEP/BFF). The U.S. Department of Energy's National Nuclear Security Administration Nevada Site Office (NNSA/NSO) as land manager (owner), and National Security Technologies (NSTec), as operator, will store, collect, process, and dispose all solid waste by means that do not create a health hazard, a public nuisance, or cause impairment of the environment. NTS disposal sites will not be included in the Nye County Solid Waste Management Plan. The NTS is located approximately 105 kilometers (km) (65 miles [mi]) northwest of Las Vegas, Nevada (Figure 1). The U.S. Department of Energy (DOE) is the federal lands management authority for the NTS, and NSTec is the Management and Operations contractor. Access on and off the NTS is tightly controlled, restricted, and guarded on a 24-hour basis. The NTS has signs posted along its entire perimeter. NSTec is the operator of all solid waste disposal sites on the NTS. The Area 5 RWMS is the location of the permitted facility for the Solid Waste Disposal Site (SWDS). The …
Date: September 14, 2010
Creator: Programs, NSTec Environmental
Object Type: Report
System: The UNT Digital Library
Monte Carlo Studies of the Radiation Fields in the Linac Coherent Light Source Undulators and of the Corresponding Signals in the Cerenkov Beam Loss Monitors (open access)

Monte Carlo Studies of the Radiation Fields in the Linac Coherent Light Source Undulators and of the Corresponding Signals in the Cerenkov Beam Loss Monitors

In 2009 the Linac Coherent Light Source (LCLS) at the SLAC National Accelerator Center started free electron laser (FEL) operation. In order to continue to produce the bright and short-pulsed x-ray laser demanded by FEL scientists, this pioneer hard x-ray FEL requires a perfectly tailored magnetic field at the undulators, so that the photons generated at the electron wiggling path interact at the right phase with the electron beam. In such a precise system, small (>0.01%) radiation-induced alterations of the magnetic field in the permanent magnets could affect FEL performance. This paper describes the simulation studies of radiation fields in permanent magnets and the expected signal in the detectors. The transport of particles from the radiation sources (i.e. diagnostic insert) to the undulator magnets and to the beam loss monitors (BLM) was simulated with the intra nuclear cascade codes FLUKA and MARS15. In order to accurately reproduce the optics of LCLS, lattice capabilities and magnetic fields were enabled in FLUKA and betatron oscillations were validated against reference data. All electron events entering the BLMs were printed in data files. The paper also introduces the Radioactive Ion Beam Optimizer (RIBO) Monte Carlo 3-D code, which was used to read from the …
Date: September 14, 2010
Creator: Santana Leitner, Mario
Object Type: Article
System: The UNT Digital Library
Thermal Expansion of LX-17, PBX 9502 and Ultrafine TATB (open access)

Thermal Expansion of LX-17, PBX 9502 and Ultrafine TATB

None
Date: September 14, 2010
Creator: Souers, P. C.; Lewis, P.; Hoffman, M. & Cunningham, B.
Object Type: Report
System: The UNT Digital Library