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3(omega) damage threshold evaluation of final optics components using Beamlet mule and off-line testing
A statistics-based model is being developed to predict the laser-damage-limited lifetime of UV optical components on the NIF laser. In order to provide data for the model, laser damage experiments were performed on the Beamlet laser system at LLNL. An early prototype NIF focus lens was exposed to twenty 35 1 nm pulses at an average fluence of 5 J/cm{sup 2}, 3ns. Using a high resolution optic inspection system a total of 353 damage sites was detected within the 1160 cm{sup 2} beam aperture. Through inspections of the lens before, after and, in some cases, during the campaign, pulse to pulse damage growth rates were measured for damage initiating both on the surface and at bulk inclusions. Growth rates as high as 79 {micro}m/pulse (surface diameter) were observed for damage initiating at pre-existing scratches in the surface. For most damage sites on the optic, both surface and bulk, the damage growth rate was approximately l0{micro}m/pulse. The lens was also used in Beamlet for a subsequent 1053 {micro}m/526 {micro}m campaign. The 352 {micro}m-initiated damage continued to grow during that campaign although at generally lower growth rate.
Date:
July 27, 1998
Creator:
Kozlowski, M. F.; Maricle, S.; Mouser, R.; Schwartz, S.; Wegner, P. & Weiland, T.
Object Type:
Article
System:
The UNT Digital Library
5-kWe Reactor Thermoelectric System: Summary
This report documents the systems and component requirements, design approaches, and performance and design characteristics for the 5-kwe system.
Date:
July 27, 1973
Creator:
Van Osdol, J. H.
Object Type:
Report
System:
The UNT Digital Library
209-E Building -- Response to ventilation failure evaluation
This document provides an evaluation and recommendations for radiological workplace air monitoring and response to ventilation failure for the Critical Mass Laboratory, 209-E Building. The Critical Mass Laboratory, part of the 209-E Building, was designed to provide a heavily shielded room where plutonium and uranium liquid solutions could be brought into various critical configurations under readily controlled and monitored conditions. The facility is contained within a one-story L-shaped concrete block and reinforced concrete building. One wing houses offices, a control room, shops, and a common area while the other wing includes an equipment room, the change room, work areas, and the two-story Critical Assembly Room (CAR). Three of the rooms contain radiologically contaminated equipment and materials.
Date:
July 27, 1998
Creator:
Foust, D.J.
Object Type:
Report
System:
The UNT Digital Library
300 kWt core conceptual model thermal/hydraulic characteristics
This is a Report of a study that has been made Nak cooled reactor containing 199 ZrH-UO2 fuel elements to determine thermal-hydraulic characteristics of the core bundle, It contains nominal operating power of the reactor is 300kwt with the Nak existing from the core at 1200 F.
Date:
July 27, 1971
Creator:
Moody, E.
Object Type:
Report
System:
The UNT Digital Library
2001 Gordon Research Conference on Organometallic Chemistry. Final progress report [agenda and attendee list]
The Gordon Research Conference on Organometallic Chemistry was held at Salve Regina University, Newport, Rhode Island, July 22-27, 2001. The conference had 133 participants. The attendees represented the spectrum of endeavor in this field, coming from academia, industry, and government laboratories, and included US and foreign scientists, senior researchers, young investigators, and students. Emphasis was place on current unpublished research and discussion of the future target areas in this field. There was a conscious effort to stimulate lively discussion about the key issues in the field today. Time for formal presentations was limited in the interest of group discussions; poster sessions were held.
Date:
July 27, 2001
Creator:
Burns, Carol
Object Type:
Report
System:
The UNT Digital Library
2010 Census: Redesigned Approach Holds Promise, but Census Bureau Needs to Annually Develop and Provide a Comprehensive Project Plan to Monitor Costs
Testimony issued by the Government Accountability Office with an abstract that begins "The U.S. Census Bureau (Bureau) estimates that the 2010 Census will cost over $11.3 billion, making it the most expensive in our history. The U.S. House of Representatives and Senate appropriation bills propose to reduce the Bureau's fiscal year 2007 budget request, raising questions about the Bureau's design of the 2010 Census and associated costs. Based on issued GAO work, this testimony addresses the extent to which the Bureau has (1) made progress redesigning its approach, including nonresponse follow-up, a key cost driver; and (2) developed a comprehensive project plan for the 2010 Census, as well as timely, detailed cost data for effective oversight and cost control."
Date:
July 27, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
2012 ELECTRONIC SPECTROSCOPY & DYNAMICS GORDON RESEARCH CONFERENCE, JULY 22-27, 2012
Topics covered in this GRC include high-resolution spectroscopy, coherent electronic energy transport in biology, excited state theory and dynamics, excitonics, electronic spectroscopy of cold and ultracold molecules, and the spectroscopy of nanostructures. Several sessions will highlight innovative techniques such as time-resolved x-ray spectroscopy, frequency combs, and liquid microjet photoelectron spectroscopy that have forged stimulating new connections between gas-phase and condensed-phase work.
Date:
July 27, 2012
Creator:
Kohler, Bern
Object Type:
Article
System:
The UNT Digital Library
2012 THIN FILM AND SMALL SCALE MECHANICAL BEHAVIOR GRS/GRC, JULY 21-27, 2012
The mechanical behavior of materials with small dimension(s) is of both fundamental scientific interest and technological relevance. The size effects and novel properties that arise from changes in deformation mechanism have important implications for modern technologies such as thin films for microelectronics and MEMS devices, thermal and tribological coatings, materials for energy production and advanced batteries, etc. The overarching goal of the 2012 Gordon Research Conference on "Thin Film and Small Scale Mechanical Behavior" is to discuss recent studies and future opportunities regarding elastic, plastic and time-dependent deformation, as well as degradation and failure mechanisms such as fatigue, fracture and wear. Specific topics of interest include, but are not limited to: fundamental studies of physical mechanisms governing small-scale mechanical behavior; advances in test techniques for materials at small length scales, such as nanotribology and high-temperature nanoindentation; in-situ mechanical testing and characterization; nanomechanics of battery materials, such as swelling-induced phenomena and chemomechanical behavior; flexible electronics; mechanical properties of graphene and carbon-based materials; mechanical behavior of small-scale biological structures and biomimetic materials. Both experimental and computational work will be included in the oral and poster presentations at this Conference.
Date:
July 27, 2012
Creator:
Balk, Thomas
Object Type:
Article
System:
The UNT Digital Library
The 2mrad horizontal crossing angle IR layout for a TeV ILC
The current status of the 2mrad crossing angle layout for the ILC is reviewed. The scheme developed in the UK and France is described and the performance discussed for a TeV machine. Secondly, the scheme developed at SLAC and BNL is then studied and modified for a TeV machine. We find that both schemes can handle the higher energy beam with modifications, and share many common features.
Date:
July 27, 2005
Creator:
Appleby, R.; Angal-Kalinin, D.; /Daresbury; Bambade, P.; Mouton, B.; /Orsay, LAL et al.
Object Type:
Article
System:
The UNT Digital Library
Aboveground Oil Storage Tanks: Observations on EPA's Economic Analyses of Amendments to the Spill Prevention, Control, and Countermeasure Rule
A letter report issued by the Government Accountability Office with an abstract that begins "Oil in aboveground tanks can leak into soil and nearby water, threatening human health and wildlife. To prevent certain oil spills, the Environmental Protection Agency (EPA) issued the Spill Prevention, Control, and Countermeasure (SPCC) rule in 1973. EPA estimated that, in 2005, about 571,000 facilities were regulated under this rule. When finalizing amendments to the rule in 2002 and 2006 to both strengthen the rule and reduce industry burden, EPA analyzed the amendments' potential impacts and concluded that the amendments were economically justified. As requested, GAO assessed the reasonableness of EPA's economic analyses of the 2002 and 2006 SPCC amendments, using Office of Management and Budget (OMB) guidelines for federal agencies in determining regulatory impacts, among other criteria, and discussed EPA's analyses with EPA officials."
Date:
July 27, 2007
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Acceptance test plan for fourth generation Hanford corrosion monitoring system
This Acceptance Test Plan (ATP) will document the satisfactory operation of the corrosion probe cabinets destined for installation on tanks 241-AN-102 and 241-AN-107. This ATP will be performed by the manufacturer on each cabinet prior to delivery to the site. The objective of this procedure is to demonstrate and document the acceptance of the corrosion monitoring cabinets to be installed on tanks 241-AN-102 and 241-AN-107. One cabinet will be installed on each tank. Each cabinet will contain corrosion monitoring hardware to be connected to existing corrosion probes already installed in each tank. The test will consist of a continuity test of the cabinet wiring from the end of cable to be connected to corrosion probe, through the appropriate intrinsic safety barriers and out to the 15 pin D-shell connectors to be connected to the corrosion monitoring instrument. Additional testing will be performed using a constant current and voltage source provided by the corrosion monitoring hardware manufacturer to verify proper operation of corrosion monitoring instrumentation (input a known signal and see if the instrumentation records the proper value).
Date:
July 27, 2000
Creator:
Norman, E. C.
Object Type:
Report
System:
The UNT Digital Library
Adaptive optics high resolution spectroscopy: present status and future direction
High resolution spectroscopy experiments with visible adaptive optics (AO) telescopes at Starfire Optical Range and Mt. Wilson have demonstrated that spectral resolution can be routinely improved by a factor of - 10 over the seeing-limited case with no extra light losses at visible wavelengths. With large CCDs now available, a very wide wavelength range can be covered in a single exposure. In the near future, most large ground-based telescopes will be equipped with powerful A0 systems. Most of these systems are aimed primarily at diffraction-limited operation in the near IR. An exciting new opportunity will thus open up for high resolution IR spectroscopy. Immersion echelle gratings with much coarser grooves being developed by us at LLNL will play a critical role in achieving high spectral resolution with a compact and low cost IR cryogenically cooled spectrograph and simultaneous large wavelength coverage on relatively small IR detectors. We have constructed a new A0 optimized spectrograph at Steward Observatory to provide R = 200,000 in the optical, which is being commissioned at the Starfire Optical Range 3.5m telescope. We have completed the optical design of the LLNL IR Immersion Spectrograph (LISPEC) to take advantage of improved silicon etching technology. Key words: adaptive …
Date:
July 27, 1999
Creator:
Alcock, C.; Angel, R.; Ciarlo, D.; Fugate, R. O.; Ge, J.; Kuzmenko, P. et al.
Object Type:
Article
System:
The UNT Digital Library
Adjustable Hoe
Patent for improvement in "the construction of hoes and to provide a simple, practical, and inexpensive hoe, of strong and durable construction." (lines 11-13) including illustrations.
Date:
July 27, 1915
Creator:
Armstrong, John Joshua, Sr.
Object Type:
Patent
System:
The Portal to Texas History
Adsorption air conditioner for electric vehicle applications. Revision 1
This paper shows an analysis of the applicability of an adsorption system for electric vehicle (EV) air conditioning. Adsorption systems are designed and optimized to provide the required cooling for four combinations of vehicle characteristics and driving cycles. The resulting adsorption systems are compared with vapor compression air conditioners that can satisfy the cooling load. The objective function is the overall system weight, which includes the cooling system weight and the weight of the battery necessary to provide energy for air conditioner operation. The system with the minimum overall weight is considered to be the best, because a lower weight results in an increased vehicle range. The results indicate that, for the conditions analyzed in this paper, vapor compression air conditioners are superior to adsorption systems not only because they are lighter, but also because they have a higher COP and are more compact.
Date:
July 27, 1994
Creator:
Aceves, S.M.
Object Type:
Article
System:
The UNT Digital Library
AECOP Task Assignment No. 5
This document details information provided in support of AECOP Task Assignment No. 5, ``Conversion of Np-237 to Pu-238.`` Conversion efficiency of each production reactor for a range of product purities and for the anticipated range of available flux levels is given.
Date:
July 27, 1967
Creator:
Woods, W.K.
Object Type:
Report
System:
The UNT Digital Library
Afghanistan: Post-War Governance, Security, and U.S. Policy
This report considers the transition in government meant to stabilize Afghanistan. Moreover, the report discusses the new constitution and the benefits of it, such as women participating in politics. The report also discusses the NATO led troops in the region.
Date:
July 27, 2006
Creator:
Katzman, Kenneth
Object Type:
Report
System:
The UNT Digital Library
Agricultural Disaster Assistance
This report describes federal agricultural disaster assistance available to farmers for crop losses, livestock deaths, and tree damage due to natural disasters or adverse weather conditions such as drought.
Date:
July 27, 2017
Creator:
Stubbs, Megan
Object Type:
Report
System:
The UNT Digital Library
AIDS in Africa
Sub-Saharan Africa ("Africa" hereafter) has been more severely affected by AIDS than any other part of the world. Experts attribute the severity of Africa's AIDS epidemic to the region's poverty, women's relative lack of empowerment, high rates of male worker migration, and other factors. Health systems there are ill-equipped; AIDS' severe social and economic consequences are depriving Africa of skilled workers and teachers, and reducing life expectancy by decades in some countries. This report explains the AIDS crisis and surrounding issues in detail, as well as U.S. and international efforts to provide general and economic aid. Relevant U.S. legislation is also outlined.
Date:
July 27, 2006
Creator:
Cook, Nicolas
Object Type:
Report
System:
The UNT Digital Library
AIDS in Africa
This report discusses the AIDS issues in Africa and the Bush administration call to double U.S. international funding for AIDS.
Date:
July 27, 2006
Creator:
Cook, Nicolas
Object Type:
Report
System:
The UNT Digital Library
AIDS in Africa
Sub-Saharan Africa has been far more severely affected by AIDS than any other part of the world. The United Nations reports that 24.5 million adults and children are infected with the HIV virus in the region, which has about 11% of the world's population but more than 64% of the worldwide total of infected people. This report discusses this issue in detail, including the cause of the African AIDS epidemic, the social and economic consequences, response and treatment, and U.S. policy.
Date:
July 27, 2006
Creator:
Cook, Nicolas
Object Type:
Report
System:
The UNT Digital Library
Air Force Economic Impact report for Pope AFB
DISREGARD HEADER AND FOOTER RESTRICTION – Economic Impact report graphs for Pope Air Force Base of proposed BRAC 05 Action.
Date:
July 27, 2005
Creator:
United States. Department of Defense.
Object Type:
Book
System:
The UNT Digital Library
Air Pollution: Air Quality, Visibility, and the Potential Impacts of Coal-Fired Power Plants on Great Basin National Park, Nevada
Correspondence issued by the Government Accountability Office with an abstract that begins "Great Basin National Park encompasses over 77,000 acres of White Pine County in east-central Nevada and is home to diverse geologic, topographic, and wildlife resources--including ancient bristlecone pines, the world's longest living tree species. The park was created to preserve a representative segment of the Great Basin Region and receives about 80,000 visitors annually. The park features numerous scenic areas with views of the surrounding landscape, which includes both deserts and mountains. The National Park Service (NPS), within the Department of the Interior, is responsible for managing the park, and the park's management plan lists both air quality and visibility as outstanding resources. This plan identifies threats to air quality and visibility--including air pollution from the possible development of coal-fired power plants in the region--and states that even slight increases in air pollution could cause major decreases in visibility. In 2004 and 2006, two companies each initiated the process to build new coal-fired power plants about 55 miles northwest of Great Basin National Park, near the city of Ely, Nevada. While the development of these new power plants would provide jobs, needed electric power, and other benefits, they …
Date:
July 27, 2009
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
ALE3D Rolling Simulations
Hot rolling is a problem involving large deformations during the process of turning an ingot into a thin sheet. As a result of the large deformations inherent in the process, significant amounts of energy are put into the ingot mechanically, most of which results in heat generation. Therefore, in order to predict the results of rolling both the mechanical and the thermal factors must accurately represent the real conditions. The factors which must be properly tuned include interface friction, mass scaling to decrease computation times, heat transfer at the interface, convective heat transfer from the ingot, and convective heat transfer from the roll. Since these parameters are generally not measurable the correct values must be derived by tuning the parameters so that solutions match some other measurable result. The interface friction will be tuned using an ALE3D input deck which has been set up to output the torque applied to the roll during the pass. The friction coefficient will be adjusted so that the computed torque matches the measured value. The various heat transfer coefficients are dependent on each other, and are tuned based on measured roll surface temperatures, ingot exit temperatures, and the energy input through the mechanical deformation …
Date:
July 27, 2006
Creator:
Riordan, T
Object Type:
Report
System:
The UNT Digital Library
An algorithm to calculate the beam momentum distribution from flying wire profiles
Horizontal flying wire measurements give beam profiles from which information about the beam momentum distribution and betatron distribution can be extracted. When calculating these beam characteristics in the past, for the matter of simplicity, the beam has been assumed Gaussian. For beam profiles which may not be Gaussian, an algorithm to obtain the general beam momentum distribution is developed using the Fourier transform to the beam profiles. Since the profile is the convolution of the momentum distribution and the betatron distribution, using a Fourier transform method makes calculations easier. 6 figs.
Date:
July 27, 1989
Creator:
Wang, X.Q.
Object Type:
Report
System:
The UNT Digital Library