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Optimization of Dynamic Aperture of PEP-X Baseline Design
SLAC is developing a long-range plan to transfer the evolving scientific programs at SSRL from the SPEAR3 light source to a much higher performing photon source. Storage ring design is one of the possibilities that would be housed in the 2.2-km PEP-II tunnel. The design goal of PEPX storage ring is to approach an optimal light source design with horizontal emittance less than 100 pm and vertical emittance of 8 pm to reach the diffraction limit of 1-{angstrom} x-ray. The low emittance design requires a lattice with strong focusing leading to high natural chromaticity and therefore to strong sextupoles. The latter caused reduction of dynamic aperture. The dynamic aperture requirement for horizontal injection at injection point is about 10 mm. In order to achieve the desired dynamic aperture the transverse non-linearity of PEP-X is studied. The program LEGO is used to simulate the particle motion. The technique of frequency map is used to analyze the nonlinear behavior. The effect of the non-linearity is tried to minimize at the given constrains of limited space. The details and results of dynamic aperture optimization are discussed in this paper.
Date:
August 23, 2010
Creator:
Wang, Min-Huey; Cai, Yunhai & Nosochkov, Yuri
Object Type:
Article
System:
The UNT Digital Library
Preliminary study for the OFFELO
X-ray Optics-Free FEL Oscillator (OFFELO) has potential of becoming a choice for next generation light sources. Using electron beam for the feedback allows OFFELO to be completely tunable and to combine the peak power of high-gain SASE FELs with extremely narrow bandwidth of the oscillator. While the high-gain X-ray FELs has been studied in depth and has been successfully demonstrated, two other concepts (the transport and the feed-back) involved in OFFELO still need detail studies. In this short paper we focus on the simulation of the feedback process and the evolution of FEL spectrum in X-ray OFFELO. In our initial studies of OFFELO studied the saturation of the system and also its evolution using Genesis 2.0 code with a homemade wrapping code. While and lattice design from the modulator to the radiator, in order to minimize the feedback information loss in transporting the beam.
Date:
August 23, 2010
Creator:
Hao, Y. & Litvinenko, V. N.
Object Type:
Article
System:
The UNT Digital Library
SiC Power MOSFET with Improved Gate Dielectric
In this STTR program, Structured Materials Industries (SMI), and Cornell University are developing novel gate oxide technology, as a critical enabler for silicon carbide (SiC) devices. SiC is a wide bandgap semiconductor material, with many unique properties. SiC devices are ideally suited for high-power, highvoltage, high-frequency, high-temperature and radiation resistant applications. The DOE has expressed interest in developing SiC devices for use in extreme environments, in high energy physics applications and in power generation. The development of transistors based on the Metal Oxide Semiconductor Field Effect Transistor (MOSFET) structure will be critical to these applications.
Date:
August 23, 2010
Creator:
Sbrockey, Nick M; Tompa, Gary S; Spencer, Michael G & Chandrashekhar, Chandra MVS
Object Type:
Report
System:
The UNT Digital Library
Supreme Court Nominations, 1789 - 2010: Actions by the Senate, the Judiciary Committee, and the President
This report lists and describes actions taken by the Senate, the Senate Judiciary Committee, and the President on all Supreme Court nominations, from 1789 to the present.
Date:
August 23, 2010
Creator:
Rutkus, Denis Steven & Bearden, Maureen
Object Type:
Report
System:
The UNT Digital Library
Sweetwater Reporter (Sweetwater, Tex.), Vol. 112, No. 238, Ed. 1 Monday, August 23, 2010
Daily newspaper from Sweetwater, Texas that includes local, state, and national news along with advertising.
Date:
August 23, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Test of the Universality of Naive-time-reversal-odd Fragmentation Functions
We investigate the"spontaneous'' hyperon transverse polarization in e+e- annihilation and semi-inclusive deep inelastic scattering processes as a test of the universality of the naive-time-reversal-odd transverse momentum dependent fragmentation functions. We find that universality implies definite sign relations among various observables. This provides a unique opportunity to study initial/final state interaction effects in the fragmentation process and test the associated factorization.
Date:
August 23, 2010
Creator:
Boer, Daniel; Kang, Zhong-Bo; Vogelsang, Werner & Yuan, Feng
Object Type:
Article
System:
The UNT Digital Library
Texas Animal Health Commission Requests for Legislative Appropriations: Fiscal Years 2012 and 2013
The legislative appropriations request from the Texas Animal Health Commission for fiscal years 2012 and 2013 including budget outlines and specific requests.
Date:
August 23, 2010
Creator:
Texas Animal Health Commission
Object Type:
Book
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-0789
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification: Whether a county’s disclosure on its website of driver’s license photographs received from the Department of Public Safety would violate the Motor Vehicle Records Disclosure Act of the federal Driver’s Privacy Protection Act (RQ-0799-GA)
Date:
August 23, 2010
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-0790
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification: Combining real property and improvements on one parcel identification number or taxpayer account for appraisal district record purposes (RQ-0827-GA)
Date:
August 23, 2010
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Attorney General Opinion: GA-0791
Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Greg Abbott, regarding a legal question submitted for clarification: Use ad management of a county jail commissary fund under Local Government Code section 351.0415 (RQ-0841-GA)
Date:
August 23, 2010
Creator:
Texas. Attorney-General's Office.
Object Type:
Text
System:
The Portal to Texas History
Texas Commission on Environmental Quality Requests for Legislative Appropriations: Fiscal Years 2012 and 2013
Report submitted by the Texas Commission on Environmental Quality containing background information on the commission, and summaries of requests for appropriations and expenditures for the fiscal years 2012 and 2013 with supporting documentation.
Date:
August 23, 2010
Creator:
Texas Commission on Environmental Quality
Object Type:
Book
System:
The Portal to Texas History
Texas State Office of Risk Management Requests for Legislative Appropriations: Fiscal Years 2012 and 2013
A legislative appropriation request for the biennium 2012-2013, in order to provide more effective claims administration and risk management services and ultimately result in savings to state agencies in the form of reduced workers' compensation claims and costs, reduced insurance purchases and improved insurance coverages, and more effective risk management programs.
Date:
August 23, 2010
Creator:
Texas. State Office of Risk Management.
Object Type:
Book
System:
The Portal to Texas History
XFEL Oscillator Simulation Including Angle-Dependent Crystal Reflectivity
The oscillator package within the GINGER FEL simulation code has now been extended to include angle-dependent reflectivity properties of Bragg crystals. Previously, the package was modified to include frequencydependent reflectivity in order to model x-ray FEL oscillators from start-up from shot noise through to saturation. We present a summary of the algorithms used for modeling the crystal reflectivity and radiation propagation outside the undulator, discussing various numerical issues relevant to the domain of high Fresnel number and efficient Hankel transforms. We give some sample XFEL-O simulation results obtained with the angle-dependent reflectivity model, with particular attention directed to the longitudinal and transverse coherence of the radiation output.
Date:
August 23, 2010
Creator:
Fawley, William; Lindberg, Ryan; Kim, K. J. & Shvyd'ko, Yuri
Object Type:
Article
System:
The UNT Digital Library
2010 Atomic & Molecular Interactions Gordon Research Conference
The Atomic and Molecular Interactions Gordon Conferences is justifiably recognized for its broad scope, touching on areas ranging from fundamental gas phase and gas-condensed matter collision dynamics, to laser-molecule interactions, photophysics, and unimolecular decay processes. The meeting has traditionally involved scientists engaged in fundamental research in gas and condensed phases and those who apply these concepts to systems of practical chemical and physical interest. A key tradition in this meeting is the strong mixing of theory and experiment throughout. The program for 2010 conference continues these traditions. At the 2010 AMI GRC, there will be talks in 5 broadly defined and partially overlapping areas of intermolecular interactions and chemical dynamics: (1) Photoionization and Photoelectron Dynamics; (2) Quantum Control and Molecules in Strong Fields; (3) Photochemical Dynamics; (4) Complex Molecules and Condensed Phases; and (5) Clusters and Reaction Dynamics. These areas encompass many of the most productive and exciting areas of chemical physics, including both reactive and nonreactive processes, intermolecular and intramolecular energy transfer, and photodissociation and unimolecular processes. Gas phase dynamics, van der Waals and cluster studies, laser-matter interactions and multiple potential energy surface phenomena will all be discussed.
Date:
July 23, 2010
Creator:
Martinez, Todd
Object Type:
Article
System:
The UNT Digital Library
2010 Plant Molecular Biology Gordon Research Conference
The Plant Molecular Biology Conference has traditionally covered a breadth of exciting topics and the 2010 conference will continue in that tradition. Emerging concerns about food security have inspired a program with three main themes: (1) genomics, natural variation and breeding to understand adaptation and crop improvement, (2) hormonal cross talk, and (3) plant/microbe interactions. There are also sessions on epigenetics and proteomics/metabolomics. Thus this conference will bring together a range of disciplines, will foster the exchange of ideas and enable participants to learn of the latest developments and ideas in diverse areas of plant biology. The conference provides an excellent opportunity for individuals to discuss their research because additional speakers in each session will be selected from submitted abstracts. There will also be a poster session each day for a two-hour period prior to dinner. In particular, this conference plays a key role in enabling students and postdocs (the next generation of research leaders) to mingle with pioneers in multiple areas of plant science.
Date:
July 23, 2010
Creator:
Sussman, Michael
Object Type:
Article
System:
The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 112, No. 164, Ed. 1 Friday, July 23, 2010
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
July 23, 2010
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 90, No. 146, Ed. 1 Friday, July 23, 2010
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
July 23, 2010
Creator:
Halter, Janie
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 104, No. 59, Ed. 1 Friday, July 23, 2010
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
July 23, 2010
Creator:
Cartwright, Brian & Velvin, Candace E.
Object Type:
Newspaper
System:
The Portal to Texas History
Broadband Loan and Grant Programs in the USDA’s Rural Utilities Service
None
Date:
July 23, 2010
Creator:
Kruger, Lennard G.
Object Type:
Report
System:
The UNT Digital Library
Dallas Voice (Dallas, Tex.), Vol. 27, No. 10, Ed. 1 Friday, July 23, 2010
Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
July 23, 2010
Creator:
Nash, Tammye
Object Type:
Newspaper
System:
The UNT Digital Library
The Democratic Republic of Congo: Background and Current Developments
This report discusses in brief the current political state of the Democratic Republic of the Congo, as well as the crisis situation in eastern Congo that has displaced more than 250,000 civilians. It also describes U.S., U.N., and other international efforts to aid in resolving the crisis.
Date:
July 23, 2010
Creator:
Dagne, Ted
Object Type:
Report
System:
The UNT Digital Library
Department of Education: Improved Dissemination and Timely Product Release Would Enhance the Usefulness of the What Works Clearinghouse
A letter report issued by the Government Accountability Office with an abstract that begins "In connection with the Omnibus Appropriations Act, 2009, GAO was required to study the What Works Clearinghouse (WWC), a federal source of evidence about effective education practices. Operating through a 5-year contract awarded by the U.S. Department of Education's Institute of Education Sciences (IES), the WWC reviews education research and disseminates its findings. GAO examined: (1) the extent to which the WWC review process meets accepted standards for research evaluation and how the WWC has responded to recommendations and criticism, (2) how WWC output and costs have changed over time and how its performance is measured, and (3) how WWC products are disseminated and how useful educators find them to be. To conduct its work, GAO reviewed WWC-related documents, analyzed cost and performance data, surveyed all states and a nationally representative sample of school districts, and interviewed IES officials, WWC contractors, researchers, and others."
Date:
July 23, 2010
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Diboson Production at the Tevatron
Here we summarize the recent measurements of the diboson production cross sections and limits on trilinear gauge boson couplings using 1-5 fb{sup -1} of Tevatron data collected by the CDF and D0 detectors. These results are the most precise to date from a hadron collider.
Date:
July 23, 2010
Creator:
Sekaric, Jadranka
Object Type:
Article
System:
The UNT Digital Library
The Dodd-Frank Wall Street Reform and Consumer Protection Act: Titles III and VI, Regulation of Depository Institutions and Depository Institution Holding Companies
This report discusses Titles III and VI of the Dodd-Frank Act, which effectuate changes in the regulatory structure governing depository institutions and their holding companies and, thus, constitute a substantial component of the reform effort.
Date:
July 23, 2010
Creator:
Murphy, M. Maureen
Object Type:
Report
System:
The UNT Digital Library