A 1-Joule laser for a 16-fiber injection system (open access)

A 1-Joule laser for a 16-fiber injection system

A 1-J laser was designed to launch light down 16, multi-mode fibers (400-{micro}m-core dia.). A diffractive-optic splitter was designed in collaboration with Digital Optics Corporation (DOC), and was delivered by DOC. Using this splitter, the energy injected into each fiber varied <1%. The spatial profile out of each fiber was such that there were no ''hot spots,'' a flyer could successfully be launched and a PETN pellet could be initiated. Preliminary designs of the system were driven by system efficiency where a pristine TEM{sub 00} laser beam would be required. The laser is a master oscillator, power amplifier (MOPA) consisting of a 4-mm-dia. Nd:YLF rod in the stable, q-switched oscillator and a 9.5-mm-dia. Nd:YLF rod in the double-passed amplifier. Using a TEM{sub 00} oscillator beam resulted in excellent transmission efficiencies through the fibers at lower energies but proved to be quite unreliable at higher energies, causing premature fiber damage, flyer plate rupture, stimulated Raman scattering (SRS), and stimulated Brillouin scattering (SBS). Upon further investigation, it was found that both temporal and spatial beam formatting of the laser were required to successfully initiate the PETN. Results from the single-mode experiments, including fiber damage, SRS and SBS losses, will be presented. In …
Date: April 6, 2004
Creator: Honig, J.
Object Type: Article
System: The UNT Digital Library
2-D or not 2-D, that is the question: A Northern California test (open access)

2-D or not 2-D, that is the question: A Northern California test

Reliable estimates of the seismic source spectrum are necessary for accurate magnitude, yield, and energy estimation. In particular, how seismic radiated energy scales with increasing earthquake size has been the focus of recent debate within the community and has direct implications on earthquake source physics studies as well as hazard mitigation. The 1-D coda methodology of Mayeda et al. has provided the lowest variance estimate of the source spectrum when compared against traditional approaches that use direct S-waves, thus making it ideal for networks that have sparse station distribution. The 1-D coda methodology has been mostly confined to regions of approximately uniform complexity. For larger, more geophysically complicated regions, 2-D path corrections may be required. The complicated tectonics of the northern California region coupled with high quality broadband seismic data provides for an ideal ''apples-to-apples'' test of 1-D and 2-D path assumptions on direct waves and their coda. Using the same station and event distribution, we compared 1-D and 2-D path corrections and observed the following results: (1) 1-D coda results reduced the amplitude variance relative to direct S-waves by roughly a factor of 8 (800%); (2) Applying a 2-D correction to the coda resulted in up to 40% variance …
Date: June 6, 2005
Creator: Mayeda, K; Malagnini, L; Phillips, W S; Walter, W R & Dreger, D
Object Type: Article
System: The UNT Digital Library
3-D Thermal Evaluations for a Fueled Experiment in the Advanced Test Reactor (open access)

3-D Thermal Evaluations for a Fueled Experiment in the Advanced Test Reactor

The DOE Advanced Fuel Cycle Initiative and Generation IV reactor programs are developing new fuel types for use in the current Light Water Reactors and future advanced reactor concepts. The Advanced Gas Reactor program is planning to test fuel to be used in the Next Generation Nuclear Plant (NGNP) nuclear reactor. Preliminary information for assessing performance of the fuel will be obtained from irradiations performed in the Advanced Test Reactor large ''B'' experimental facility. A test configuration has been identified for demonstrating fuel types typical of gas cooled reactors or fast reactors that may play a role in closing the fuel cycle or increasing efficiency via high temperature operation Plans are to have 6 capsules, each containing 12 compacts, for the test configuration. Each capsule will have its own temperature control system. Passing a helium-neon gas through the void regions between the fuel compacts and the graphite carrier and between the graphite carrier and the capsule wall will control temperature. This design with three compacts per axial level was evaluated for thermal performance to ascertain the temperature distributions in the capsule and test specimens with heating rates that encompass the range of initial heat generation rates.
Date: October 6, 2004
Creator: Ambrosek, Richard G.; Chang, Gray S. & Utterbeck, Debby J.
Object Type: Article
System: The UNT Digital Library
The 9/11 Commission and a National Counterterrorism Center: Issues and Options for Congress (open access)

The 9/11 Commission and a National Counterterrorism Center: Issues and Options for Congress

From Summary: "This report, which will be updated, examines a number of issues as Congress considers codification of an NCTC. One issue is whether the centralization remedy the commission has recommended fits the problems associated specifically with the 9/11 intelligence failure, and perhaps more broadly, the systematic maladies affecting the Intelligence Community. There are at least four options for congressional consideration: (1) NCTC with intelligence and operational planning duties, (2) NCTC restricted to an intelligence role, (3) NCTC restricted to an operational planning role, and (4) status quo plus-viewing the newly forming collected entity as a pilot potential NCTC. As one of its 41 recommendations, the 9/11 Commission recommended the creation of a National Counterterroism Center (NCTC)."
Date: October 6, 2004
Creator: Masse, Todd
Object Type: Report
System: The UNT Digital Library
9/11 Commission: Current Legislative Proposals for U.S. Immigration Law and Policy (open access)

9/11 Commission: Current Legislative Proposals for U.S. Immigration Law and Policy

This report briefly discusses some of the major immigration areas under consideration in comprehensive reform proposals suggested by the 9/11 Commission, including asylum, biometric tracking systems, border security, document security, exclusion, immigration enforcement, and visa issuances. It refers to other CRS reports that discuss these issues in depth and will be updated as needed.
Date: December 6, 2004
Creator: Garcia, Michael John & Wasem, Ruth Ellen
Object Type: Report
System: The UNT Digital Library
20% Partial Siberian Snake in the AGS. (open access)

20% Partial Siberian Snake in the AGS.

An 11.4% partial Siberian snake was used to successfully accelerate polarized proton through a strong intrinsic depolarizing spin resonance in the AGS. No noticeable depolarization was observed. This opens up the possibility of using a 20% to 30% partial Siberian snake in the AGS to overcome all weak and strong depolarizing spin resonances. Some design and operation issues of the new partial Siberian snake are discussed.
Date: November 6, 2002
Creator: Huang, H.; Bai, M.; Brown, K. A.; Glenn, W.; Luccio, A. U.; MacKay, W. W. et al.
Object Type: Article
System: The UNT Digital Library
100% foundry compatible packaging and full wafer release and die separation technique for surface micromachined devices (open access)

100% foundry compatible packaging and full wafer release and die separation technique for surface micromachined devices

A completely foundry compatible chip-scale package for surface micromachines has been successfully demonstrated. A pyrex (Corning 7740) glass cover is placed over the released surface micromachined die and anodically bonded to a planarized polysilicon bonding ring. Electrical feedthroughs for the surface micromachine pass underneath the polysilicon sealing ring. The package has been found to be hermetic with a leak rate of less than 5 x 10{sup {minus}8} atm cm{sup {minus}3}/s. This technology has applications in the areas of hermetic encapsulation and wafer level release and die separation.
Date: April 6, 2000
Creator: Oliver, Andrew D. & Matzke, Carolyn M.
Object Type: Article
System: The UNT Digital Library
AZ-101 Mixer Pump Test MT Fury Suspended Solids Profiler Application and Testing (open access)

AZ-101 Mixer Pump Test MT Fury Suspended Solids Profiler Application and Testing

Describes the radiation testing and calibration of the AZ-101 tank suspended solids profiler unit mounted on 6 tank riser 24A. The Mt. Fury Suspended Solids Profiler (SSP) is a microprocessor-controlled instrument that measures the turbidity of solid-liquid suspensions and sludges. The profiler is used commercially for the monitoring and control of clarifiers and thickeners in waste treatment, mining, pulp and paper, and other industrial processing facilities. The instrument includes a three inch diameter probe, a Kynar coated coaxial cable, a reel assembly with a clutch and drive shaft, a stepper motor, and electronics. The instrument measures insoluble or suspended solids content in liquids by transmitting infrared energy at a wavelength of 935 nm and measuring the extent of backscatter. This frequency is not affected by solution color. There are two detectors that allow the instrument to operate over a broad range of concentrations, from clear liquids to light sludges.
Date: January 6, 2000
Creator: MACLEAN, G.T.
Object Type: Report
System: The UNT Digital Library
108th Air Refueling Wing Future Missions Military Value (open access)

108th Air Refueling Wing Future Missions Military Value

108th Air Refueling Wing Future Missions Military Value. Community Input from McGuire AFB local area.
Date: September 6, 2005
Creator: unknown
Object Type: Text
System: The UNT Digital Library
The 13th International Symposium on Relations between Homogeneous and Heterogeneous Catalysis -- AnIntroduction (open access)

The 13th International Symposium on Relations between Homogeneous and Heterogeneous Catalysis -- AnIntroduction

Over forty years, there have been major efforts to aim at understanding the properties of surfaces, structure, composition, dynamics on the molecular level and at developing the surface science of heterogeneous and homogeneous catalysis. Since most catalysts (heterogeneous, enzyme and homogeneous) are nanoparticles, colloid synthesis methods were developed to produce monodispersed metal nanoparticles in the 1-10 nm range and controlled shapes to use them as new model catalyst systems in two-dimensional thin film form or deposited in mezoporous three-dimensional oxides. Studies of reaction selectivity in multipath reactions (hydrogenation of benzene, cyclohexene and crotonaldehyde) showed that reaction selectivity depends on both nanoparticle size and shape. The oxide-metal nanoparticle interface was found to be an important catalytic site because of the hot electron flow induced by exothermic reactions like carbon monoxide oxidation.
Date: February 6, 2008
Creator: Somorjai, Gabor A.
Object Type: Article
System: The UNT Digital Library
2001/2002 Engineering Annual Summary (open access)

2001/2002 Engineering Annual Summary

None
Date: March 6, 2003
Creator: Lane, M. & Mahler, J.
Object Type: Report
System: The UNT Digital Library
2001 Gordon Research Conference on Laser Diagnostics in Combustion. Final Progress Report (open access)

2001 Gordon Research Conference on Laser Diagnostics in Combustion. Final Progress Report

None
Date: July 6, 2001
Creator: unknown
Object Type: Article
System: The UNT Digital Library
2005 Molecular Energy Transfer Gordon Conference (open access)

2005 Molecular Energy Transfer Gordon Conference

This Report is on Molecular Energy Transfer of Gordon Conference
Date: November 6, 2005
Creator: Wodtke, Allec M.
Object Type: Article
System: The UNT Digital Library
2005 Report to the Base Closure and Realignment Commission: Industrial JCSG Justification Book (open access)

2005 Report to the Base Closure and Realignment Commission: Industrial JCSG Justification Book

Lima Tank Plant, Ohio, Recommendation: Realign Lima Tank Plant, OH. Retain the portion required to support the manufacturing of armored combat vehicles to include Army Future Combat System (FCS) program, Marine Corps Expeditionary Force Vehicle (EFV) chassis, and M1 Tank recapitalization program. Justification, Payback, Economic Impact, Community Infrastructure, Environmental Impact
Date: June 6, 2005
Creator: United States. Department of Defense.
Object Type: Book
System: The UNT Digital Library
2005 Report to the Base Closure and Realignment Commission: Industrial JCSG Justification Book (open access)

2005 Report to the Base Closure and Realignment Commission: Industrial JCSG Justification Book

IJCSG - Munitions / Armaments Capacity Report, Armaments Production/Manufacturing
Date: June 6, 2005
Creator: United States. Department of Defense.
Object Type: Book
System: The UNT Digital Library
2005 Report to the Base Closure and Realignment Commission: Industrial JCSG Justification Book (open access)

2005 Report to the Base Closure and Realignment Commission: Industrial JCSG Justification Book

IJCSG Summary Military Value Report for Munitions, Activity, Score
Date: June 6, 2005
Creator: United States. Department of Defense.
Object Type: Book
System: The UNT Digital Library
2006 Brookhaven National Laboratory Annual Illness and Injury Surveillance Report (open access)

2006 Brookhaven National Laboratory Annual Illness and Injury Surveillance Report

The U.S. Department of Energy’s (DOE) commitment to assuring the health and safety of its workers includes the conduct of illness and injury surveillance activities that provide an early warning system to detect health problems among workers. The Illness and Injury Surveillance Program monitors illnesses and health conditions that result in an absence, occupational injuries and illnesses, and disabilities and deaths among current workers.
Date: March 6, 2008
Creator: United States. Department of Energy. Office of Health, Safety, and Security.
Object Type: Report
System: The UNT Digital Library
2006 Demographic Study of Texas Lottery Players (open access)

2006 Demographic Study of Texas Lottery Players

This report provides the results of a random survey of adult Texas residents aged 18 and older to measure the citizen participation rates, the distribution and frequency of play, and the demographic profiles of the past-year players and the non-players.
Date: December 6, 2006
Creator: Ver Duin, D'Arlene & Glass, James
Object Type: Text
System: The Portal to Texas History
2006 Photoions, Photoionization & Photodetachment held on January 29-February 3, 2006 (open access)

2006 Photoions, Photoionization & Photodetachment held on January 29-February 3, 2006

The 4th Gordon Conference on Photoions, Photoionization and Photodetachment will be held January 29-February 3, 2006 at the Santa Ynez Valley Marriott in Buellton, California. This meeting will continue to cover fundamentals and applications of photoionization and photodetachment, including valence and core-level phenomena and applications to reaction dynamics, ultrashort laser pulses and the study of exotic molecules and anions. Further information will be available soon at the Gordon Conference Website, and will be announced.
Date: September 6, 2006
Creator: Gray, Robert Continetti Nancy Ryan
Object Type: Article
System: The UNT Digital Library
The 2008 Farm Bill: Major Provisions and Legislative Action (open access)

The 2008 Farm Bill: Major Provisions and Legislative Action

This report provides a summary of 2008 farm bill implementation, discusses provisions, and includes a farm bill debate timeline.
Date: November 6, 2008
Creator: Becker, Geoffrey S.; Capehart, Tom; Chite, Ralph M.; Cowan, Tadlock; Gorte, Ross W.; Hanrahan, Charles E. et al.
Object Type: Report
System: The UNT Digital Library
The 2009 Influenza Pandemic: An Overview (open access)

The 2009 Influenza Pandemic: An Overview

This report describes the World Health Organization (WHO) process to determine the phase of a threatened or emerging flu pandemic, and touches on several related issues.
Date: August 6, 2009
Creator: Lister, Sarah A. & Redhead, C. Stephen
Object Type: Report
System: The UNT Digital Library
The 2009 Influenza Pandemic: Selected Legal Issues (open access)

The 2009 Influenza Pandemic: Selected Legal Issues

Recent human cases of infection with a novel influenza A(H1N1) virus have been identified both internationally and in the United States. Since there has been human to human transmission and the new virus has the potential to become pandemic, it is timely to examine legal issues surrounding this emerging public health threat. This report will provide a brief overview of selected legal issues.
Date: May 6, 2009
Creator: Swendiman, Kathleen S. & Jones, Nancy L.
Object Type: Report
System: The UNT Digital Library
2009 Photosynthesis to be held June 28 - July 3, 2009 (open access)

2009 Photosynthesis to be held June 28 - July 3, 2009

The capture of solar energy by photosynthesis has had a most profound influence on the development and sustenance of life on earth. It is the engine that has driven the proliferation of life and, as the source of both energy and oxygen, has had a major hand in shaping the forms that life has taken. Both ancient and present day photosynthetic carbon fixation is intimately tied to issues of immediate human concern, global energy and global warming. Decreasing our reliance on fossil fuels by tapping photosynthesis in a more direct way is an attractive goal for sustainable energy. Meeting this challenge means understanding photosynthetic energy conversion at a molecular level, a task requiring perspectives ranging through all disciplines of science. Researchers in photosynthesis have a strong history of working across conventional boundaries and engaging in multidisciplinary collaborations. The Gordon conference in photosynthesis has been a key focal point for the dissemination of new results and the establishment of powerful research collaborations. In this spirit the 2009 Gordon conference on biophysical aspects of photosynthesis will bring together top international researchers from diverse and complementary disciplines, all working towards understanding how photosynthesis converts light into the stable chemical energy that powers so …
Date: July 6, 2009
Creator: Bruce, Doug
Object Type: Article
System: The UNT Digital Library
2009 Plant Lipids: Structure, Metabolism & Function Gordon Research Conference - February 1- 6 ,2009 (open access)

2009 Plant Lipids: Structure, Metabolism & Function Gordon Research Conference - February 1- 6 ,2009

The Gordon Research Conference on 'Plant Lipids: Structure, Metabolism and Function' has been instituted to accelerate research productivity in the field of plant lipids. This conference will facilitate wide dissemination of research breakthroughs, support recruitment of young scientists to the field of plant lipid metabolism and encourage broad participation of the plant lipid community in guiding future directions for research in plant lipids. This conference will build upon the strengths of the successful, previous biannual meetings of the National Plant Lipid Cooperative (www.plantlipids.org) that began in 1993, but will reflect a broader scope of topics to include the biochemistry, cell biology, metabolic regulation, and signaling functions of plant acyl lipids. Most importantly, this conference also will serve as a physical focal point for the interaction of the plant lipid research community. Applications to attend this conference will be open to all researchers interested in plant lipids and will provide a venue for the presentation of the latest research results, networking opportunities for young scientists, and a forum for the development and exchange of useful lipid resources and new ideas. By bringing together senior- and junior-level scientists involved in plant lipid metabolism, a broad range of insights will be shared and …
Date: February 6, 2009
Creator: Chapman, Kent D.
Object Type: Article
System: The UNT Digital Library