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WELDING AND BRAZING OF HIGH-TEMPERATURE RADIATORS AND HEAT EXCHANGERS

Description: Procedures were developed for fabricating highperformance radiators and heat exchangers for the Aircraft Nuclear Propulsion (ANP) Program. These components, which contain multitudes of tube-to-tube sheet and tube-to-fin joints, are similar in design to those under consideration for a variety of space vehicle applications. In order to ensure reliability of the tube-to-tube sheet joints, techniques producing welds of extremely high quality were used and back brazing of the welds with a suitable a… more
Date: February 20, 1962
Creator: Slaughter, G.M. & Patriarca, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Near Term Hybrid Passenger Vehicle Development Program. Phase I, Final report. Appendix A: mission analysis and performance specification studies. Volume I

Description: Studies are described which were performed for the Near Term Hybrid Vehicle program to determine passenger car usage patterns and to correlate these trip mission characteristics with vehicle design and performance specifications. (LCL)
Date: April 20, 1979
Creator: Traversi, M. & Barbarek, L.A.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Noise Considerations in Nuclear Pulse Amplifiers

Description: The effects of certain pulse-shaping networks on the signal-to-noise ratio of a nuclear pulse amplifier were considered. The shaping networks discussed are: equal RC-integrating and RC-differentiating time constant, single- delay-line clipper and RC integrator, and doubledelay-line clipper and RC integrator. The effects of these networks on the signal, when high count rates and overload pulses are present, were also considered. Equations and curves were developed for the energy resolution (sign… more
Date: December 20, 1961
Creator: Landis, D. A.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
open access

Collector sealants and breathing. Final Report, 25 September 1978-31 December 1979

Description: The objectives of this program were: (1) to investigate the pertinent properties of a variety of possible sealants for solar collectors and identify the most promising candidates, and (2) to study the effect of breathing in flat-plate, thermal solar collector units. The study involved two types of sealants, Class PS which includes preformed seals or gaskets and Class SC which includes sealing compounds or caulks. It was the intent of the study to obtain data regarding initial properties of cand… more
Date: February 20, 1980
Creator: Mendelsohn, M A; Luck, R M; Yeoman, F A & Navish, Jr, F W
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Development of marketable solar assisted heat pumps. Phase II. Summary report, technical results

Description: A water source heat pump has been designed that is capable of operating over the range from 40 to 110/sup 0/F entering water temperature and has a heating coefficient of performance greater than six in the upper portion of this range. A computerized heat pump balance program was written to allow the performance of either a water-to-water or a water-to-air heat pump to be predicted in either the heating or cooling mode. A detailed program description, flow charts, and sample outputs are appended… more
Date: February 20, 1981
Creator: Hundt, R. & Heard, S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Lithium--water--air battery project: progress during the months of August--November. [Development of prototype Al/air cell]

Description: Work done on the Lithium--Water--Air Battery Research Program in the work period August through November, 1977, is summarized. A prototype single-cell fuel cell was developed. The single galvanic cell consists of two 30-cm square aluminum plates separated by a two-faced air cathode mockup. The purposes of the model are to determine ease and cost of electrode servicing and weight and manufacturing cost of the hardware. Projections of fuel cell performance and cost were made, based on the prototy… more
Date: December 20, 1977
Creator: Cooper, J.F.; Hosmer, P.K.; Krikorian, O.; Kelly, E. & Parrish, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Beam deflection into a quadrant by a positionally stationary magnetic bending system

Description: A system of postionally stationary magnets is analyzed for the continuously variable deflection of a 50 MeV electron beam. The system is composed of a collection of horizontal and vertical bending magnets, quadrupoles, and a final deflection magnet that is conical in shape and capable of deflections of plus or minus 50 degrees simultaneously in both horizonal and vertical planes. Throughout the system the beam is assumed to be focused by its own magnetic self-field, the electric self-field bein… more
Date: June 20, 1980
Creator: Paul, A.C. & Neil, V.K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Perturbations to the horizontal off-energy functions in the arcs

Description: The perturbation of off-energy functions in the arcs affects the SLC performance in two ways. First of all, it introduces additional emittance blow-up in the arcs through synchrotron radiation loss. Secondly, if the perturbation is too large, the chromatic correction in the final focus cannot completely suppress the eta at IP resulting in a larger beam size. Both effects reduce the luminosity. In this report an analysis is made of the disturbances to the horizontal eta-function generated by imp… more
Date: July 20, 1986
Creator: Sands, M. & Weng, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Long-life cathode for the Berkeley-type ion source

Description: Preliminary experiments indicate that a hollow cathode, made from impregnated tungsten emitters, can be adapted for the Lawrence Berkeley Laboratory (LBL)/Lawrence Livermore Laboratory (LLL) ion source. Such cathodes could be the basis of a long life, continuously operated positive-ion source.
Date: October 20, 1977
Creator: Fink, J.H. & Biagi, L.A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Fundamentals and techniques of nonimaging optics for solar energy concentration. Final report

Description: Nonimaging optics is a new discipline with techniques, formalism and objectives quite distinct from the traditional methods of focusing optics. These new systems achieve or closely approach the maximum concentration permitted by the Second Law of Thermodynamics for a given angular acceptance and are often called ideal. Application of these new principles to solar energy over the past seven years has led to the invention of a new class of solar concentrators, the most well known version of which… more
Date: May 20, 1980
Creator: Winston, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Testing Short Samples of ITER Conductors and Projection of Their Performance in ITER Magnets

Description: Qualification of the ITER conductor is absolutely necessary. Testing large scale conductors is expensive and time consuming. To test straight 3-4m long samples in a bore of a split solenoid is a relatively economical way in comparison with fabrication of a coil to be tested in a bore of a background field solenoid. However, testing short sample may give ambiguous results due to different constraints in current redistribution in the cable or other end effects which are not present in the large m… more
Date: August 20, 2007
Creator: Martovetsky, N. N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

An Overview of the Motional Stark Effect Diagnostic On DIII-D And Design Work For An ITER MSE

Description: The advanced tokamak research program at DIII-D relies critically on the measurement of the current density profile. This was made possible by the development of a Motional Stark Effect (MSE) polarimeter that was first installed in 1992. Three major upgrades have since occurred, and improvements in our understanding of critical performance issues and calibration techniques are ongoing. In parallel with these improvements, we have drawn on our DIII-D experience to begin studies and design work f… more
Date: September 20, 2007
Creator: Holcomb, C. T.; Allen, S. L.; Makowski, M. A.; Jayakumar, R. J.; Gu, M. F.; Lerner, S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Development of a Fan-Filter Unit Test Standard, Laboratory Validations, and its Applications across Industries

Description: Lawrence Berkeley National Laboratory (LBNL) is now finalizing the Phase 2 Research and Demonstration Project on characterizing 2-foot x 4-foot (61-cm x 122-cm) fan-filter units in the market using the first-ever standard laboratory test method developed at LBNL.[1][2][3] Fan-filter units deliver re-circulated air and provide particle filtration control for clean environments. Much of the energy in cleanrooms (and minienvironments) is consumed by 2-foot x 4-foot (61-cm x 122-cm) or 4-foot x 4-f… more
Date: October 20, 2006
Creator: Xu, Tengfang
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

System Design and New Materials for Reversible, Solid-Oxide, High Temperature Steam Electrolysis

Description: High temperature solid oxide electrolysis cells (SOECs) offer high electrical efficiency and a potential path to large scale hydrogen production. Solid oxide technology is capable of both power generation and hydrogen production. That makes it possible for the development of a reversible solid-oxide system that can respond to market conditions to produce electricity or hydrogen on demand. New high-temperature electrolyzer cell materials are needed to enable cost-effective hydrogen production sy… more
Date: December 20, 2007
Creator: Ruud, J.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Performance of Integrated Hydronic Heating Systems.

Description: A variety of system configurations are used in North America to meet the heating and domestic hot water needs of single-family homes. This includes, for example: warm air furnaces with electric water heaters; boilers with integrated hot water coils; and boilers with 'indirect' hot water storage tanks. Integrated hydronic systems which provide both heat and hot water are more popular only in the Northeast and mid-Atlantic regions. For those making decisions about configurations of these integrat… more
Date: December 20, 2007
Creator: BUTCHER,T.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Simulation Strategies for Shock-Turbulence Interactions

Description: The computational challenge of predicting shock-turbulence interactions stems from the fundamentally different physics at play. Shock waves are microscopically thin regions wherein flow properties change rapidly over a distance roughly equal to the molecular mean free path; hence, they are essentially strong discontinuities in the flow field. Turbulence, on the other hand, is a chaotic phenomenon with broadband spatial and temporal scales of motion. Most shock-capturing methods rely on strong n… more
Date: February 20, 2008
Creator: Cook, A; Larsson, J; Cabot, W & Lele, S K
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Use of Helical Fields to Allow a Long Pulse Reversed Field Pinch

Description: The maintenance of the magnetic configuration of a Reversed Field Pinch (RFP) is an unsolved problem. Even a toroidal loop voltage does not suffice to maintain the magnetic configuration in axisymmetry but could if the plasma had helical shaping. The theoretical tools for plasma optimization using helical shaping have advanced, so an RFP could be relatively easily designed for optimal performance with a spatially constant toroidal loop voltage. A demonstration that interesting solutions exist i… more
Date: November 20, 2008
Creator: Boozer, A. & Pomphrey, N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

FY05 HPCRM Annual Report: High-Performance Corrosion-Resistant Iron-Based Amorphous Metal Coatings

Description: New corrosion-resistant, iron-based amorphous metals have been identified from published data or developed through combinatorial synthesis, and tested to determine their relative corrosion resistance. Many of these materials can be applied as coatings with advanced thermal spray technology. Two compositions have corrosion resistance superior to wrought nickel-based Alloy C-22 (UNS No. N06022) in some very aggressive environments, including concentrated calcium-chloride brines at elevated temper… more
Date: September 20, 2007
Creator: Farmer, J.; Choi, J.; Haslam, J.; Day, S.; Yang, N.; Headley, T. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

FY 2007 Miniature Spherical Retroreflectors Final Report

Description: Miniature spherical retroreflectors, less than 8 millimeters in diameter, are currently being developed to enhance remote optical detection of nuclear proliferation activities. These retroreflecting spheres resemble small, sand-colored marbles that have the unique optical property of providing a strong reflection directly back to the source (i.e., retroreflecting) when illuminated with a laser. The addition of specific coatings, sensitive to specific chemicals or radioactive decay in the enviro… more
Date: February 20, 2008
Creator: Anheier, Norman C.; Bernacki, Bruce E. & Krishnaswami, Kannan
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Magnetic core studies at LBNL and LLNL

Description: The objective of this work is to minimize the cost of the materials and maximize the performance of magnetic cores, a major cost component of a Heavy-Ion-Fusion, HIF, induction accelerator driver. This includes selection of the alloy for cost and performance, and maximizing the performance of each alloy evaluated. The two major performance parameters are the magnetic flux swing and the energy loss. The volt seconds of the cores, obtained from the flux swing with Faraday's Law, determines the be… more
Date: September 20, 1997
Creator: Molvik, A.W.; Faltens, A.; Reginato, L.; Blaszkiewicz, M.; Smith, C. & Wood, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Improving Consistency of Performance Assessments in the Doe Complex

Description: The low-level waste (LLW) performance assessment (PA) process has been traditionally focused on disposal facilities at a few United States Department of Energy (USDOE) sites and commercial disposal facilities. In recent years, there has been a dramatic increase in the scope of the use of PA-like modeling approaches, involving multiple activities, facilities, contractors and regulators. The scope now includes, for example: (1) National Environmental Policy Act (NEPA) assessments, (2) CERCLA disp… more
Date: January 20, 2009
Creator: Seitz, R. & Elmer Wilhite, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

NARAC SOFTWARE QUALITY ASSURANCE: ADAPTING FORMALISM TO MEET VARYING NEEDS

Description: The National Atmospheric Release Advisory Center (NARAC) provides tools and services that predict and map the spread of hazardous material accidentally or intentionally released into the atmosphere. NARAC is a full function system that can meet a wide range of needs with a particular focus on emergency response. The NARAC system relies on computer software in the form of models of the atmosphere and related physical processes supported by a framework for data acquisition and management, user in… more
Date: November 20, 2007
Creator: Walker, H; Nasstrom, J S & Homann, S G
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Speech recognition systems on the Cell Broadband Engine

Description: In this paper we describe our design, implementation, and first results of a prototype connected-phoneme-based speech recognition system on the Cell Broadband Engine{trademark} (Cell/B.E.). Automatic speech recognition decodes speech samples into plain text (other representations are possible) and must process samples at real-time rates. Fortunately, the computational tasks involved in this pipeline are highly data-parallel and can receive significant hardware acceleration from vector-streaming… more
Date: April 20, 2007
Creator: Liu, Y.; Jones, H.; Vaidya, S.; Perrone, M.; Tydlitat, B. & Nanda, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A Comparison of Photoresist Resolution Metrics using 193 nm and EUV Lithography

Description: Image blur due to chemical amplification represents a fundamental limit to photoresist performance and manifests itself in many aspects of lithographic performance. Substantial progress has been made in linking image blur with simple resolution metrics using EUV lithography. In this presentation, they examine performance of 193 nm resist and EUV resist systems using modulation transfer function, corner rounding, and other resolution metrics. In particular, they focus on cross-comparisons in whi… more
Date: August 20, 2007
Creator: Jones, Juanita; Pathak, Piyush; Wallow, Thomas; LaFontaine, Bruno; Deng, Yunfei; Kim, Ryoung-han et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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