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0.25mm-Thick CCD Packaging for the Dark Energy Survey Camera Array
Abstract: The Dark Energy Survey Camera focal plane array will consist of 62 2k x 4k CCDs with a pixel size of 15 microns and a silicon thickness of 250 microns for use at wavelengths between 400 and 1000 nm. Bare CCD die will be received from the Lawrence Berkeley National Laboratory (LBNL). At the Fermi National Accelerator Laboratory, the bare die will be packaged into a custom back-side-illuminated module design. Cold probe data from LBNL will be used to select the CCDs to be packaged. The module design utilizes an aluminum nitride readout board and spacer and an Invar foot. A module flatness of 3 microns over small (1 sqcm) areas and less than 10 microns over neighboring areas on a CCD are required for uniform images over the focal plane. A confocal chromatic inspection system is being developed to precisely measure flatness over a grid up to 300 x 300 mm. This system will be utilized to inspect not only room-temperature modules, but also cold individual modules and partial arrays through flat dewar windows.
Date:
2006-06~
Creator:
Derylo, Greg; Diehl, H. Thomas & Estrada, Juan
Object Type:
Article
System:
The UNT Digital Library
225-kW Dynamometer for Testing Small Wind Turbine Components
Poster for WindPower 2006 held June 4-7, 2006, in Pittsburgh, PA, describing the 225-kW dynamometer for testing small wind turbine components.
Date:
June 1, 2006
Creator:
Green, J.
Object Type:
Article
System:
The UNT Digital Library
225-kW Dynamometer for Testing Small Wind Turbine Components: Preprint
This paper describes NREL's new 225-kW dynamometer facility that is suitable for testing a variety of components and subsystems for small wind turbines and discusses opportunities for industry partnerships with NREL for use of the facility.
Date:
June 1, 2006
Creator:
Green, J.
Object Type:
Article
System:
The UNT Digital Library
2005 Cellulases and Cellulosomes Gordon Research Conferences
This report is on Cellulases and Cellulosomes on Gordon Research Conferences.
Date:
June 1, 2006
Creator:
Gray, Nancy Ryan & Warren, Richard
Object Type:
Article
System:
The UNT Digital Library
2007 Solar Decathlon: Powered by the Sun
The 2007 Solar Decathlon Brochure is a multipurpose document that provides a broad overview of the Decathlon's background, purpose, scope, the student participants, as well as the successes from the 2002 and 2005 competitions and the excitement and energy surrounding the event.
Date:
June 1, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
The 5th Symposium on Post-Transcriptional Regulation of Plant Gene Expression (PTRoPGE)
The 5th Symposium on Post-Transcriptional Regulation of Plant Gene Expression (PTRoPGE) will be held June 8-12, 2005 at the University of Texas at Austin. Exciting new and ongoing discoveries show significant regulation of gene expression occurs after transcription. These post-transcriptional control events in plants range from subtle regulation of transcribed genes and phosphorylation, to the processes of gene regulation through small RNAs. This meeting will focus on the regulatory role of RNA, from transcription, through translation and finally degradation. The cross-disciplinary design of this meeting is necessary to encourage interactions between researchers that have a common interest in post-transcriptional gene expression in plants. By bringing together a diverse group of plant molecular biologist and biochemists at all careers stages from across the world, this meeting will bring about more rapid progress in understanding how plant genomes work and how genes are finely regulated by post-transcriptional processes to ultimately regulate cells.
Date:
June 1, 2006
Creator:
Browning, Karen S.; Petrocek, Marie & Bartel, Bonnie
Object Type:
Report
System:
The UNT Digital Library
Acceleration of dormant storage effects to address the reliability of silicon surface micromachined Micro-Electro-Mechanical Systems (MEMS).
Qualification of microsystems for weapon applications is critically dependent on our ability to build confidence in their performance, by predicting the evolution of their behavior over time in the stockpile. The objective of this work was to accelerate aging mechanisms operative in surface micromachined silicon microelectromechanical systems (MEMS) with contacting surfaces that are stored for many years prior to use, to determine the effects of aging on reliability, and relate those effects to changes in the behavior of interfaces. Hence the main focus was on 'dormant' storage effects on the reliability of devices having mechanical contacts, the first time they must move. A large number ({approx}1000) of modules containing prototype devices and diagnostic structures were packaged using the best available processes for simple electromechanical devices. The packaging processes evolved during the project to better protect surfaces from exposure to contaminants and water vapor. Packages were subjected to accelerated aging and stress tests to explore dormancy and operational environment effects on reliability and performance. Functional tests and quantitative measurements of adhesion and friction demonstrated that the main failure mechanism during dormant storage is change in adhesion and friction, precipitated by loss of the fluorinated monolayer applied after fabrication. The data indicate …
Date:
June 1, 2006
Creator:
Cox, James V.; Candelaria, Sam A.; Dugger, Michael Thomas; Duesterhaus, Michelle Ann; Tanner, Danelle Mary; Timpe, Shannon J. et al.
Object Type:
Report
System:
The UNT Digital Library
Accelerator physics code web repository
None
Date:
June 1, 2006
Creator:
Zimmermann, F.; Basset, R.; Bellodi, G.; Benedetto, E.; Dorda, U.; Giovannozzi, M. et al.
Object Type:
Article
System:
The UNT Digital Library
Advanced Multi-Product Coal Utilization By-Product Processing Plant
The objective of the project is to build a multi-product ash beneficiation plant at Kentucky Utilities 2,200-MW Ghent Generating Station, located in Carroll County, Kentucky. This part of the study includes an investigation of the secondary classification characteristics of the ash feedstock excavated from the lower ash pond at Ghent Station. The secondary classification testing was concluded using a continuous demonstration-scale lamella classifier that was operated at a feed rate of 0.3 to 1.5 tons/hr. Feed to the secondary classifier was generated by operating the primary classifier at the conditions shown to be effective previously. Samples were taken while the secondary classifier was operated under a variety of conditions in order to determine the range of conditions where the unit could be efficiently operated. Secondary classification was effective for producing an ultra-fine ash (UFA) product. Inclined lamella plates provided an effective settling surface for coarser ash particles and plate spacing was shown to be an important variable. Results showed that the closer the plate spacing, the finer the size distribution of the UFA product. Flotation of the secondary classifier feed provided a lower LOI UFA product (2.5% LOI vs. 4.5% LOI) and a dispersant dosage of 2 to 2.5 g/kg …
Date:
June 1, 2006
Creator:
Groppo, John; Robl, Thomas & Rathbone, Robert
Object Type:
Report
System:
The UNT Digital Library
Advanced Petroleum-Based Fuels -- Diesel Emissions Control Project (APBF-DEC): Lubricants Project, Phase 2 Final Report
This report summarizes the results of the second phase of a lubricants project, which investigated the impact of engine oil formulation on diesel vehicle emissions and the performance of a nitrogen oxide adsorber catalyst (NAC).
Date:
June 1, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Advanced Wind Technology: New Challenges for a New Century
This paper describes the growth, advances, and challenges faced by the wind energy industry in 2006.
Date:
June 1, 2006
Creator:
Thresher, R. & Laxson, A.
Object Type:
Article
System:
The UNT Digital Library
The Age, Volume 28, Number 6, June 2006
Monthly publication containing information related to Chambers County, Texas, including current events of the Chambers County Historical Commission, the Wallisville Heritage Park, and the Chambers County historical and genealogical societies; reprinted newspaper articles about county events and citizens; and historical news and records.
Date:
June 2006
Creator:
Wallisville Heritage Park (Organization)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The AGR-1 Irradiation -Objectives, Success Criteria and Risk Management
The AGR-1 experiment being conducted by the US Department of Energy Advanced Gas Reactor Fuel Development and Qualification Program (AGR fuel program) will irradiate TRISO-coated particle fuel in compacts under conditions representative of a Very High Temperature Reactor (VHTR) core. The anticipated fuel performance requirements of a prismatic core VHTR significantly exceed established TRISO-coated particle fuel capability in terms of burnup, temperature and fast fluence. AGR-1 is the first in a planned series of eight irradiations leading to the qualification of low enriched uranium coated particle fuel compacts for service in a VHTR, as identified in an overall Technical Program Plan produced at the beginning of the program . The AGR-1 experiment is scheduled for insertion in the Advanced Test Reactor (ATR) in the first quarter of fiscal year 2007 and to be irradiated for a period of up to approximately two and a half years. The irradiation rig, designated a "test train" is designed to provide six independently controlled (for temperature) and monitored (for fission product gas release) capsules containing fuel samples.
Date:
June 1, 2006
Creator:
Kendall, James
Object Type:
Report
System:
The UNT Digital Library
Air Filter Materials and Building Related Symptoms in the BASE Study
This analysis uses existing data on U.S office buildings, collected in the US Environmental Protection Agency's building assessment, Survey and Evaluations (BASE) study to investigate in greater detail the effects of air filters on BRS: specifically, the possibility that certain air filter materials contribute more than others to the burden of BRS among building occupants.
Date:
June 1, 2006
Creator:
Buchanan, I. S. & Apte, M. G.
Object Type:
Article
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 131, No. 1, Ed. 1 Thursday, June 1, 2006
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
June 1, 2006
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 107, No. 359, Ed. 1 Thursday, June 1, 2006
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 1, 2006
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Aluminum-Containing Phases in Tank Waste: Precipitation and Deposition of Aluminum-Containing Phases
Aluminosilicate deposit buildup experienced during the tank waste volume-reduction process at the Savannah River Site (SRS) required an evaporator to be shut down in October 1999. Recent investigations illustrated the accumulation 7 wt% uranium, 3% was 235U and absent of neutron poisons, within these deposits and presented a criticality concern. The Waste Processing Technology Section of Westinghouse Savannah River Company at SRS is now collaborating with a team from Pacific Northwest National Laboratory in efforts to identify the phases controlling uranium solubility and understand the conditions under which they precipitate.
Date:
June 1, 2006
Creator:
Mattigod, Shas; Hobbs, D. T.; Wellman, D. M.; Aksay, I. & Dabbs, D. M.
Object Type:
Report
System:
The UNT Digital Library
Aluminum-Containing Phases in Tank Waste: Precipitation and Deposition of Aluminum-Containing Phases
Aluminosilicate deposit buildup experienced during the tank waste volume-reduction process at the Savannah River Site (SRS) required an evaporator to be shut down in October 1999. Recent investigations illustrated the accumulation 7 wt% uranium, 3% was 235U and absent of neutron poisons, within these deposits and presented a criticality concern. The Waste Processing Technology Section of Westinghouse Savannah River Company at SRS is now collaborating with a team from Pacific Northwest National Laboratory in efforts to identify the phases controlling uranium solubility and understand the conditions under which they precipitate.
Date:
June 1, 2006
Creator:
Mattigod, Shas; Hobbs, D. T.; Wellman, D. M. & Aksay, I.
Object Type:
Report
System:
The UNT Digital Library
Ammonia-Free NOx Control System
This report describes a novel NOx control system that has the potential to drastically reduce cost, and enhance performance, operation and safety of power plant NOx control. The new system optimizes the burner and the furnace to achieve very low NOx levels and to provide an adequate amount of CO, and uses the CO for reducing NO both in-furnace and over a downstream AFSCR (ammonia-free selective catalytic reduction) reactor. The AF-SCR combines the advantages of the highly successful SCR technology for power plants and the TWC (three-way catalytic converter) widely used on automobiles. Like the SCR, it works in oxidizing environment of combustion flue gas and uses only base metal catalysts. Like the TWC, the AF-SCR removes NO and excess CO simultaneously without using any external reagent, such as ammonia. This new process has been studied in a development program jointed funded by the US Department of Energy and Foster Wheeler. The report outlines the experimental catalyst work performed on a bench-scale reactor, including test procedure, operating conditions, and results of various catalyst formulations. Several candidate catalysts, prepared with readily available transition metal oxides and common substrate materials, have shown over 80-90% removal for both NO and CO in oxidizing …
Date:
June 1, 2006
Creator:
Wu, Song; Fan, Zhen; Seltzer, Andrew H. & Herman, Richard G.
Object Type:
Report
System:
The UNT Digital Library
Analysis of FY 2005 System Operational Failures
N/A
Date:
June 1, 2006
Creator:
Michnoff, R. & Turbush, H.
Object Type:
Report
System:
The UNT Digital Library
Analytical Microscopy
In the Analytical Microscopy group, within the National Center for Photovoltaic's Measurements and Characterization Division, we combine two complementary areas of analytical microscopy--electron microscopy and proximal-probe techniques--and use a variety of state-of-the-art imaging and analytical tools. We also design and build custom instrumentation and develop novel techniques that provide unique capabilities for studying materials and devices. In our work, we collaborate with you to solve materials- and device-related R&D problems. This sheet summarizes the uses and features of four major tools: transmission electron microscopy, scanning electron microscopy, the dual-beam focused-ion-beam workstation, and scanning probe microscopy.
Date:
June 1, 2006
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Annual progress Report on research related to our research project “Stabilization of Plutonium in Subsurface Environments via Microbial Reduction and Biofilm Formation” funded by the Environmental Remediation Sciences Division (ERSD)
The overarching goal of this research project is to investigate and optimize the mechanisms for in situ immobilization of Pu species by naturally-occurring bacteria. Specific research objectives are: (a) investigate the mechanism of bacterial accumulation and immobilization of plutonium species by biofilm formation under aerobic conditions and (b) to demonstrate the direct and indirect stabilization of Pu via dissimilatory reduction by Geobacter metallireducens.
Date:
June 1, 2006
Creator:
New, Mary
Object Type:
Report
System:
The UNT Digital Library
Annual Technical Progress Report of Radioisotope Power System Materials Production and Technology Program Tasks for October 1, 2004 Through September 30, 2005
The Office of Space and Defense Power Systems of the Department of Energy (DOE) provides Radioisotope Power Systems (RPS) for applications where conventional power systems are not feasible. For example, radioisotope thermoelectric generators were supplied by the DOE to the National Aeronautics and Space Administration for deep space missions including the Cassini Mission launched in October of 1997 to study the planet Saturn. For the Cassini Mission, ORNL produced carbon-bonded carbon fiber (CBCF) insulator sets, iridium alloy blanks and foil, and clad vent sets (CVS) used in the generators. The Oak Ridge National Laboratory (ORNL) has been involved in developing materials and technology and producing components for the DOE for more than three decades. This report reflects program guidance from the Office of Space and Defense Power Systems for fiscal year (FY) 2005. Production activities for prime quality (prime) CBCF insulator sets, iridium alloy blanks and foil, and CVS are summarized in this report. Technology activities are also reported that were conducted to improve the manufacturing processes, characterize materials, or to develop information for new radioisotope power systems.
Date:
June 1, 2006
Creator:
King, James F
Object Type:
Report
System:
The UNT Digital Library
Antiproton momentum distributions as a measure of electron cooling force at the Fermilab Recycler
The Fermilab Recycler is a fixed 8 GeV kinetic energy storage ring located in the Fermilab Main Injector tunnel near the ceiling. Electron cooling of high energy antiprotons has recently been demosntrated [1] at the Recycler. Antiproton beam Schottky signals were used to measure the antiproton momentum distribution at equilibrium between a calibrated broadband diffusion source and electron cooling. The large Recycler momentum aperture, the dependence of the electron cooling force as a function of the antiproton momentum deviation and the calibrated diffusion source combine to give a unique sepectral measurement of the antiproton beam momentum distribution.
Date:
June 1, 2006
Creator:
Broemmelsiek, D. R. & Nagaitsev, S.
Object Type:
Article
System:
The UNT Digital Library