Background field coils for the High Field Test Facility (open access)

Background field coils for the High Field Test Facility

The High Field Test Facility (HFTF), presently under construction at LLNL, is a set of superconducting coils that will be used to test 1-m-o.d. coils of prototype conductors for fusion magnets in fields up to 12 T. The facility consists of two concentric sets of coils; the outer set is a stack of Nb-Ti solenoids, and the inner set is a pair of solenoids made of cryogenically-stabilized, multifilamentary Nb/sub 3/Sn superconductor, developed for use in mirror-fusion magnets. The HFTF system is designed to be parted along the midplane to allow high-field conductors, under development for Tokamak fusion machines, to be inserted and tested. The background field coils were wound pancake-fashion, with cold-welded joints at both the inner and outer diameters. Turn-to-turn insulation was fabricated at LLNL from epoxy-fiberglass strip. The coils were assembled and tested in our 2-m-diam cryostat to verify their operation.
Date: September 22, 1980
Creator: Zbasnik, J. P.; Cornish, D. N.; Scanlan, R. M.; Jewell, A. M.; Leber, R. L.; Rosdahl, A. R. et al.
Object Type: Article
System: The UNT Digital Library
Benchmark requirements for the Energy Emergency Management Information System (EEMIS). Phase 1. Work plan (open access)

Benchmark requirements for the Energy Emergency Management Information System (EEMIS). Phase 1. Work plan

EEMIS has responsibility for providing special information and communication services to government officials, at Federal and state levels, who must deal with energy emergencies. Because of proprietary information residing in the data base used for Federal purposes, a special system (EEMIS-S) must be established for use by the states. It is planned to acquire teleprocessing services for EEMIS-S from a time-sharing commercial vendor, and the process for procurement must meet guidelines for approval. The work plan and schedule for meeting these guidelines are discussed. Tasks to be included contain estimates of time, cost, and resources required, all of which are briefly described.
Date: September 22, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
Effect of strain on the martensitic phase transition in superconducting Nb/sub 3/Sn (open access)

Effect of strain on the martensitic phase transition in superconducting Nb/sub 3/Sn

The connection between the cubic-to-tetragonal martensitic phase transformation and the phenomenon of superconductivity in A15 compounds is being investigated. The degradation of the critical parameters, such as T/sub c/, H/sub c2/, and J/sub c/, with mechanical straining is of particular interest. Low-temperature x-ray diffraction experiments are performed on Nb/sub 3/Sn ribbons (with the bronze layers etched off) mounted on copper and indium sample stages. The cryostat used is unique in that it has a vacuum mechanical insert which allows the superconductor to be placed under both compressive and tensile strains while at low temperatures. Preliminary results indicate that the martensitic phase transition temperature, T/sub m/, increases with compressive strains. Other effects of strain on tetragonal phase production are also discussed.
Date: September 22, 1980
Creator: Hoard, R. W.; Scanlan, R. M.; Smith, G. S. & Farrell, C. L.
Object Type: Article
System: The UNT Digital Library
Energy consumption in commerical buildings: a comparison with BEPS budgets (open access)

Energy consumption in commerical buildings: a comparison with BEPS budgets

Metered energy consumption data have been collected on existing commercial buildings to help establish the proposed Building Energy Performance Standards (BEPS). The search has identified 84 buildings whose metered energy consumption is equal to or less than that proposed for their BEPS budgets and another 7 buildings whose metered consumption is less than 20% above their BEPS budgets. The methodology used to identify the buildings and to collect their metered energy consumption data are described. The data are analyzed and summarized and conclusions are drawn.
Date: September 22, 1980
Creator: unknown
Object Type: Report
System: The UNT Digital Library
F-111 windscreen machining. Final report (open access)

F-111 windscreen machining. Final report

Studies were conducted to determine the feasibility of improving the optical image transmitted through a military aircraft windscreen by using single-point diamond turning. Reduced warpage (waviness) of the windscreen surfaces ensures that a more accurate optical image is presented to the aircraft pilot. Machining the acrylic surface was accomplished with slightly impared image transmissibility. The use of this technique as a potential production process is discussed.
Date: September 22, 1980
Creator: Gerth, H. L. & Brown, R. J.
Object Type: Report
System: The UNT Digital Library
Image collapsing concentrators. Final technical report, 1 October 1977-1 October 1980 (open access)

Image collapsing concentrators. Final technical report, 1 October 1977-1 October 1980

Wide-angle focusing Fresnel Lenses with specially curved image collapsing mirrors are developed for nontracking solar concentrators. A new type of stepped prism lens is designed with prism facets on either the inside or outer lens surface which concentrates solar radiation incident in a 60/sup 0/ elevation by 100/sup 0/ azimuth angle sectors. Thermal tests on a small model collector with a dielectric lens aperture 30 1/2 x 30 1/2 cms were conducted using a single subreflector which concentrated all acceptance zone radiation onto a fixed absorber shelf 8 cms wide. With absorbing copper tubes coated with black chrome carrying water as circulant thermal efficiencies of approximately 50% on large East West deployed solar panels are estimated. Vacuum abosrbers were also installed with improved efficiencies and operating temperatures. Segmented subreflectors were designed to increase concentration ratios from 3 to approximately 12. An economic study of the comparative cost vs performance advantages of this new technology was made. Production cost (1980) for the stepped lens - single subreflector concentrator were estimated at about $113. per meter/sup 2/ ($10.50 per ft/sup 2/). Because of the wider angular coverages, thinner structures, and sharp focusing available for larger concentration ratios, the new technology offers important …
Date: September 22, 1980
Creator: Sletten, C.J.; Herskovitz, S.B.; Holt, F.S. & Stiglitz, M.R.
Object Type: Report
System: The UNT Digital Library
Prompt fission neutron spectra and anti. nu. p (open access)

Prompt fission neutron spectra and anti. nu. p

Methods used to obtain the evaluated prompt fisson neutron spectrum N(E) and the average prompt neutron multiplicity anti ..nu../sub p/ are reviewed. The relative influence of experimental data; interpolated, extrapolated, and fitted experimental data; systematics; and nuclear theory are considered for the cases where (a) abundant experimental data exist, (b) some experimental data exist, and (c) no experimental data exist. The Maxwellian and Watt distributions, and the determination of the parameters of these distributions by data fitting, are described and compared to recent new theoretical work on the calculation of N(E). Similarly, various expressions for anti ..gamma../sub p/ that have been obtained by data fitting and systematics are described and compared to recent new theoretical work. Complications in the evaluation of N(E) and anti ..gamma../sub p/ due to the onset of multiple-chance fission and the interrelationships between N(E), anti ..gamma delta../sub p/ and the multiple-chance fission cross section are discussed using the example of the fission of /sup 235/U. Some statistics and comments are given on the evaluations of N(E) and anti ..gamma../sub p/ contained in ENDF/B-V, and a number of concluding recommendations are made for future evaluation work.
Date: September 22, 1980
Creator: Madland, D. G.
Object Type: Article
System: The UNT Digital Library
Systematics of S- and P-wave radiation widths (open access)

Systematics of S- and P-wave radiation widths

The question of calculating differences in s- and p-wave radiation widths as a valid evaluation tool is explored. A purely statistical approach such as that provided by the Brink-Axel formula depends upon two factors: 1) an adequate description of the giant dipole resonance shape at energies well below the resonance, and 2) an adequate description of the level densities between the ground state and the excitation of the compound nucleus near the neutron separation energy. Some success has been obtained in certain regions of the periodic table with this simple approach, e.g., in the actinides where all nuclei exhibit similar rigid permanent deformations. However, if the method is to be used as a general evaluation procedure throughout the periodic table and particularly in regions where the radiative transition probabilities are enhanced by direct processes, it appears that much more nuclear structure information needs to be incorporated into the calculations.
Date: September 22, 1980
Creator: Moore, M.S.
Object Type: Article
System: The UNT Digital Library
Texas Attorney General Opinion: MW-243 (open access)

Texas Attorney General Opinion: MW-243

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, Mark White, regarding a legal question submitted for clarification: Political activities of Department of Public Safety officers
Date: September 22, 1980
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: MW-244 (open access)

Texas Attorney General Opinion: MW-244

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, Mark White, regarding a legal question submitted for clarification: Whether an optional retirement program annuity contract may provide for incidental death benefits
Date: September 22, 1980
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History
Texas Attorney General Opinion: MW-245 (open access)

Texas Attorney General Opinion: MW-245

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, Mark White, regarding a legal question submitted for clarification: Whether projects constructed by proceeds of bonds issued pursuant to article VII, section 18 of the Texas Constitution must be approved by the Coordinating Board
Date: September 22, 1980
Creator: Texas. Attorney-General's Office.
Object Type: Text
System: The Portal to Texas History