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Superconducting magnet design for Fixed-Field Alternating-Gradient (FFAG) accelerator
The FFAG accelerator requires static fields that increase with radius along the accelerator midplane according to B = B{sub 0} (R/R{sub 0}){sup 13.4}. The field is generated by equally spaced magnets around the circumference and varies from a maximum of 4.1 T to a minimum of {minus}1.9 T. The general coil design employs cryostable magnets wound with aluminum stabilized superconductor. Each magnet has resistive pole face windings outside of the cryostat to allow for field fine tuning after construction. A set of iron-free coil windings generate the required field distribution.
Date:
November 1, 1993
Creator:
Abdelsalam, M. & Kustom, R.
Object Type:
Article
System:
The UNT Digital Library
Results from the SLD barrel CRID detector
We report on operational experience with and experimental performance of the SLD barrel Cherenkov Ring Imaging Detector from the 1992 and 1993 physics runs. The liquid (C{sub 6}F{sub 14}) and gas (C{sub 5}F{sub 12}) radiator recirculation systems have performed well, and the drift gas supply system has operated successfully with TMAE for three years. Cherenkov rings have been observed from both the liquid and gas radiators. The number and angular resolution of Cherenkov photons have been measured, and found to be close to design specifications.
Date:
November 1, 1993
Creator:
Abe, K.; Antilogus, P. & Aston, D.
Object Type:
Article
System:
The UNT Digital Library
[Letter from Julie Abel to the Regional Institute Directors, November 9 , 1993]
Photocopy of a letter from Julie Abel, Program Associate, Getty Center for Education in the Arts, to the Regional Institute Directors. Discussion that the Getty Center has an opportunity to highlight the regional institutes in the "Face of Philanthropy," a feature in The Chronicle of Philanthropy. The Chronicle became interested in features RIGs after reviewing their most recent press release. The Getty Center requests of the directors to send in photographs that meet strict requirements, as listed in the letter. The photos are required to show children involved in any DBAE art activity.
Date:
November 9, 1993
Creator:
Abel, Julie
Object Type:
Letter
System:
The UNT Digital Library
Thermal phase behavior of metal surfaces: X-ray scattering studies of Pt(001)
Recent highlights of the results of x-ray scattering studies of the structure and phase behavior of smooth and vicinal Pt(001) surfaces are reviewed.
Date:
November 1, 1993
Creator:
Abernathy, D. L.; Mochrie, S. G. J.; Yoon, M.; Gibbs, D.; Gruebel, G.; Watson, G. M. et al.
Object Type:
Article
System:
The UNT Digital Library
Abilene Philharmonic Playbill: November 20-December 18, 1993
Program for Abilene Philharmonic concerts performed on November 20th and December 18th during the 44th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
November 1993
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Thin-film characterization and flaw detection. Progress report No. 7, February 1, 1993--January 31, 1994
Objective is to determine the elastic constants of thin films deposited on substrates, measure residual stresses, and detect and characterize defects in thin film substrate configurations. A line-focus acoustic microscope is being used to measure speed of surface acoustic waves (SAW) in thin film/substrate system. V(z) curves (record of transducer voltage output (V) with variation of distance z between acoustic lens and specimen) were calculated in terms of characteristic functions of acoustic lens and reflectance function of fluid-loaded specimen, and were compared with data for isotropic, anisotropic, and layered anisotropic materials. For thin film/substrate of known elasticity, theoretical surface acoustic wave velocities agree with measured V(z) curves for full range of wave propagation directions. Results have been obtained for homogeneous nitride films and transition-metal nitride superlattice films.
Date:
November 24, 1993
Creator:
Achenbach, J. D.
Object Type:
Report
System:
The UNT Digital Library
Standard testing procedures for optical fiber and unshielded twisted pair at Sandia National Laboratories
This document will establish a working standard for testing optical fiber and unshielded twisted pair cables included in the Lab-wide telecommunications cabling system. The purpose of these standard testing procedures is to deliver to all Sandians a reliable, low-maintenance, state-of-the-art, ubiquitous telecommunications cabling infrastructure capable of satisfying all current and future telecommunication needs.
Date:
November 1993
Creator:
Adams, R. L.
Object Type:
Report
System:
The UNT Digital Library
Problems in particle theory. Technical report, 1992--1993
Areas of emphasis include acceleration algorithms for the Monte Carlo analysis of lattice field and gauge theories, quaternionic generalizations of complex quantum mechanics and field theory, application of the renormalization group to the QCD phase transition, the quantum Hall effect, and black holes. Other work involved string theory, statistical properties of energy levels in integrable quantum systems, baryon asymmetry and the electroweak phase transition, anisotropies of the cosmic microwave background, and theory of superconductors.
Date:
November 1, 1993
Creator:
Adler, S. L. & Wilczek, F.
Object Type:
Report
System:
The UNT Digital Library
Wholesale Power and Transmission Rate Projections 1993--2014 and Historical Wholesale Power Rates 1939--1992.
This document provides a range of high, medium, and low case long-term projections of Bonneville Power Administration`s (BPA) wholesale power rates and a medium case long-term projection of BPA`s wheeling rates. These projections are produced annually by BPA. BPA uses these projections in long-term marketing, resource, transmission, and financial planning assessments. BPA`s projections also are used by public utility commissions, utilities, and others for a variety of planning purposes. The analysis used for these rate projections assumes that current rate making methodologies continue into the future and are further based on certain assumptions about regional loads, extra-regional markets, the costs of resources, BPA`s financial requirements, and the capability of the region`s power plants. While these projections are intended to address the overall uncertainty in rate levels, BPA realizes that the future will not reflect any specific set of assumptions. The rate projections in this document have been prepared prior to the Draft 1993 BPA Marketing Plan, the implementation of which is almost certain to push BPA away from any set of assumptions in this document. Therefore, this document can be thought of as representing the ``old`` BPA with its products and policies. It can be viewed as a starting point …
Date:
November 1, 1993
Creator:
Administration, US Bonneville Power
Object Type:
Report
System:
The UNT Digital Library
Solidification modeling of a spiral casting to determine material fluidity
In casting, fluidity is the measure of the distance a metal can flow in a channel before being stopped by solidification. During mold filling, the metal loses heat to the surrounding mold, thereby cooling and becoming more viscous until the leading portion solidifies and no further flow is possible. A coupled heat-transfer and fluid-flow modeling of a spiral, involving the use of thermophysical properties to determine material fluidity, has been conducted. Fluidity experiments were performed by Caterpillar; several spiral test castings were poured. Simulations of these experiments utilized the Casting Process Simulator (CAPS) software developed at Argonne National Laboratory. Two types of two dimensional spiral geometries with different assumptions were considered: (1) a 2-D laterally stretched spiral and (2) a 3-D lateral spiral. Computed mold filling is in good agreement with experiment. Time required by metal/gas interface to attain specific positions in the spiral arm also compares favorably with the experiment. Influence of process variables, especially pour time, is discussed. CAPS software was used to investigate validity of dimensionality assumptions and to evaluate ability of CAPS to model fluidity adequately.
Date:
November 1, 1993
Creator:
Ahuja, S.; Domanus, H. M.; Schmitt, R. C.; Chuzhoy, L. & Grabel, J. V.
Object Type:
Article
System:
The UNT Digital Library
Battery energy storage and superconducting magnetic energy storage for utility applications: A qualitative analysis
This report was prepared at the request of the US Department of Energy`s Office of Energy Management for an objective comparison of the merits of battery energy storage with superconducting magnetic energy storage technology for utility applications. Conclusions are drawn regarding the best match of each technology with these utility application requirements. Staff from the Utility Battery Storage Systems Program and the superconductivity Programs at Sandia National contributed to this effort.
Date:
November 1, 1993
Creator:
Akhil, Abbas A.; Butler, Paul & Bickel, Thomas C.
Object Type:
Report
System:
The UNT Digital Library
The Boerne Star (Boerne, Tex.), Vol. 89, No. 49, Ed. 1 Wednesday, November 17, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
November 17, 1993
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 89, No. 50, Ed. 1 Wednesday, November 24, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
November 24, 1993
Creator:
Aldridge, Leon
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 89, No. 47, Ed. 1 Wednesday, November 3, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
November 3, 1993
Creator:
Aldridge, Leon & Priddy, Travis
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star (Boerne, Tex.), Vol. 89, No. 48, Ed. 1 Wednesday, November 10, 1993
Weekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
November 10, 1993
Creator:
Aldridge, Leon & Priddy, Travis
Object Type:
Newspaper
System:
The Portal to Texas History
Modulation wavelength dependence of ion mixing in metallic superlattices
Ion mixing was studied in polycrystalline Nb/V and single-crystal Mo/V superlattices and in bilayers of the same materials. Systematic variation in the modulation wavelength, {Lambda}, revealed a factor of three decrease in mixing efficiency at small {Lambda} for Nb/V. The decrease appears to coincide with a structural transition in which the Nb/V superlattices become coherent. The results are consistent with a diffusion-induced grain boundary migration interpretation of mixing during irradiation.
Date:
November 1, 1993
Creator:
Alexander, D. E.; Fullerton, E. E.; Baldo, P. M.; Sowers, C. H. & Rehn, L. E.
Object Type:
Article
System:
The UNT Digital Library
Characterization of a Ring Optical Parametric Oscillator
We have characterize the performance, including the spatial intensity profiles of the signal and depleted pump beams, of a near-infrared, ring optical parametric oscillator.
Date:
November 1, 1993
Creator:
Alford, W. J.; Raymond, T. D. & Smith, A. V.
Object Type:
Article
System:
The UNT Digital Library
Sum frequency generation using an optical parametric oscillator
A number of applications would benefit from sources of tunable coherent ultraviolet (uv) radiation in the 250 to 400 nm range. Among these are uv fluorescence laser detection and ranging (LIDAR). Other applications such as photolithography could use a fixed-frequency solid-state equivalent to excimer lasers. Broad tunability in this wavelength region has generally been accessed by frequency doubling tunable visible or near infrared lasers or by frequency mixing these lasers with the harmonics of a Nd:YAG laser. Unfortunately, to cover the full wavelength range requires multiple dye changes and/or multiple nonlinear crystals because of the relatively narrow tuning range of any one laser medium. The use of optical parametric oscillators (OPO`s) with their wide tuning range as a tunable source of near infrared light coupled with a single {beta}-barium borate (BBO) crystal for sum frequency mixing with the Nd:YAG harmonics should yield a convenient alternative to cover this wavelength range. In this paper we demonstrate that an OPO can be efficiently sum frequency mixed with the Nd:YAG harmonics to produce tunable uv radiation in the 250--400 nm range. This is significant because OPO`s generally have poor beam quality which limits their nonlinear conversion in critically phase matched processes. Specifically, we …
Date:
November 1, 1993
Creator:
Alford, W. J.; Raymond, T. D.; Smith, A. V.; Lowenthal, D. D. & Mead, R. D.
Object Type:
Article
System:
The UNT Digital Library
Efficient modeling in transversely isotropic inhomogeneous media
An efficient modeling technique for transversely isotropic, inhomogeneous media, is developed using a mix of analytical equations and numerical calculations. The analytic equation for the raypath in a factorized transversely isotropic (FTI) media with linear velocity variation, derived by Shearer and Chapman, is used to trace between two points. In addition, I derive an analytical equation for geometrical spreading in FTI media that aids in preserving program efficiency; however, the traveltime is calculated numerically. I then generalize the method to treat general transversely isotropic (TI) media that are not factorized anisotropic inhomogeneous by perturbing the FTI traveltimes, following the perturbation ideas of Cerveny and Filho. A Kirchhoff-summation-based program relying on Trorey`s (1970) diffraction method is used to generate synthetic seismograms for such a medium. For the type of velocity models treated, the program is much more efficient than finite-difference and general ray-trace modeling techniques.
Date:
November 1993
Creator:
Alkhalifah, T.
Object Type:
Report
System:
The UNT Digital Library
Long-Range Alpha Detector (LRAD) technology applied to ER and D&D problems
Standard alpha detectors are severely limited when monitoring alpha contamination on large surfaces and the inside surfaces of pipes, ducts, and equipment. The Long-Range Alpha Detector (LRAD) system overcomes these problems by detecting the ion pairs created by an alpha particle in ambient air, rather than the alpha particle directly. These ion pairs are transported to a collection grid by either an air current or an electric field and create a small electric current (typically 10{sup {minus}13} to 10{sup {minus}14} A) that is read by an electrometer and displayed on a data acquisition system. This method of detection is used to create monitoring systems for both the environmental restoration and decontamination and decommissioning fields.
Date:
November 1, 1993
Creator:
Allander, K. S.; Bounds, J. A.; Caress, R. W.; Catlett, M. M.; Garner, S. E.; Johnson, J. P. et al.
Object Type:
Article
System:
The UNT Digital Library
Identification and H{sub {infinity}}/{mu}-synthesis control of the Sandia Truss
This paper presents an overview of an analytical and experimental system identification and control design study performed on a controlled structure test bed, the Sandia Truss. The purpose of this project was to assess the capability of several identification and control methods for vibration suppression of large structures. The Sandia Truss, like most structures, represents a challenge to the existing identification and control methods due to high modal density, closely coupled dynamics, external unmeasured inputs, and frequency regimes with poor signal-to-noise characteristics. Because large space structures will require a coordinated control involving multiple disturbances and control objectives, such as line of sight or system quiescence at a specified location, this study focused on multiple-input/multiple-output identification and control. For the study reported in this paper, control design models were developed from experimentally obtained data using the Eigensystem Realization Algorithm with Data Correlation (ERADC); and, the control design was performed using the H{infinity}/{mu}-synthesis technique.
Date:
November 1, 1993
Creator:
Allen, J. J. & Lauffer, J. P.
Object Type:
Article
System:
The UNT Digital Library
Industry/University Consortium for ATS research
The Industry/University ATS research program is the result of two planning workshops. Workshop I was held April 8--10, 1991 and had the goal of identifying research needs for advanced gas turbine cycles that would permit rapid commercialization of cycles with significant improvements over the machines currently under development, in terms of the cost of electricity produced and the environmental burdens resulting from their use in power producing. Workshop II was held in January 1992 and continued the identification of the research needs to develop advanced gas turbine systems. The goals established for the ATS systems were: (1) efficiency exceeding 60% for large utility turbine system and 15% improvement in heat rate for industrial systems; (2) busbar energy costs 10% less than current state of the art and (3) fuel flexible designs. In addition Workshop II participants agreed that an industry driven research consortium was an acceptable mechanism to achieve base technology development needs.
Date:
November 1, 1993
Creator:
Allen, R. P. & Golan, L. P.
Object Type:
Article
System:
The UNT Digital Library
University participation in the ATS program
The Advanced Gas Turbine Systems Research Program was included in DOE`s Advanced Turbine Systems initiative to conduct basic research in support of the overall ATS program, and to strengthen the university gas turbine technology base in the USA. The results of the research will be transferred to the industrial members to enhance and/or facilitate their designs of advanced gas turbine powerplants. Concurrently, the involvement of many students both graduate and undergraduate, will provide a better qualified group of engineers for hire by the industry.
Date:
November 1, 1993
Creator:
Allen, R. P. & Golan, L. P.
Object Type:
Article
System:
The UNT Digital Library
Quest for quality informal proceedings of the first Hanford Site Technical Communications Seminar
Eighty-eight people from five Hanford contractors gathered November 17, 1993, at Pacific Northwest Laboratory (PNL) to embark on a quest for quality in Technical Communications. PNL`s Applied Technologies Communication (ATC) section of the Technical Information and Communications Department (TI&CD) hosted the half-day Quest for Quality seminar, which covered such topics as document design, site-wide production standards, and ``reinventing government.`` The seminar was the first of its kind to include technical communications professionals from all Hanford Site contractors; attendees included technical editors and writers, publications assistants, text processors, and document production staff. A complete list of the attendees is included as Appendix A and the presenters are listed in Appendix B. Five Hanford contractors have technical communications staffs, all trying to meet the needs of one primary customer: the US Department of Energy (DOE). Historically, these contractors have maintained different processes and standards with regard to document production, and little interaction or information sharing has occurred. To begin remedying that situation, PNL invited technical communicators across the Hanford Site to attend the first Quest for Quality Technical Communications Seminar. The purpose of the seminar was to identify ways to improve the quality of Hanford`s communication products and processes and to strengthen …
Date:
November 1, 1993
Creator:
Allen, R.E.
Object Type:
Article
System:
The UNT Digital Library