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Acoustical heat-pumping engine

Description: The disclosure is directed to an acoustical heat pumping engine without moving seals. A tubular housing holds a compressible fluid capable of supporting an acoustical standing wave. An acoustical driver is disposed at one end of the housing and the other end is capped. A second thermodynamic medium is disposed in the housing near to but spaced from the capped end. Heat is pumped along the second thermodynamic medium toward the capped end as a consequence both of the pressure oscillation due to … more
Date: August 14, 1981
Creator: Wheatley, John C.; Swift, Gregory W. & Migliori, Albert
Item Type: Refine your search to only Patent
open access

Addition of trim coils to the Tandem Mirror Experiment Upgrade (TMX-U) magnet system to improve the magnetic field mapping

Description: The mapping of the magnetic flux bundle from the center cell to the Plasma Potential Control plates (PPC) on the end fan of the Tandem Mirror Experiment Upgrade (TMX-U), was improved by the addition of trim coils (12,000 amp-turns) on each side of each end fan next to the pump beam magnetic shields. The coils' axes are oriented perpendicular to the machine centerline. These coils made the necessary corrections to the field-line mapping, while keeping the field in the nearby pump beam magnetic s… more
Date: November 14, 1985
Creator: Wong, R. L.; Pedrotti, L. R.; Baldwin, D. E.; Hibbs, S. M.; Hill, D. N.; Hornady, R. H. et al.
Item Type: Refine your search to only Article
open access

Advanced Gas Cooled Nuclear Reactor Materials Evaluation and Development Program. Progress report, April 1, 1980-June 30, 1980

Description: Objectives of this program are to evaluate candidate alloys for Very High Temperature Reactor (VHTR) Nuclear Process Heat (NPH) and Direct Cycle Helium Turbine (DCHT) applications, in terms of the effect of simulated reactor primary coolant (helium containing small amounts of various other gases), high temperatures, and long time exposures, on the mechanical properties and structural and surface stability of selected candidate alloys. A second objective is to select and recommend materials for … more
Date: November 14, 1980
Item Type: Refine your search to only Report
open access

Aging effects of US space nuclear systems in orbit

Description: This report presents information and data in support of a cost-benefit analysis being performed by Fair child Industries (FI) on the feasibility of retrieving existing US space nuclear systems in earth orbit by the Space Shuttle. This report evaluates, for US space nuclear systems presently in orbit, the radioisotopic inventory and external radiation field as a function of time, the effect of aging on fuel containment materials over the projected lifetime of the system, and the possible radioac… more
Date: May 14, 1982
Creator: Bartram, B. W.; Huang, R.; Tammara, S. R. & Thielke, N. R.
Item Type: Refine your search to only Report
open access

All solid state high voltage power supply for neutral beam sources

Description: The conceptual design of a high frequency solid state, high power, high voltage, power system that reacts fast enough to be compatible with the requirements of a neutral beam source is presented. The system offers the potential of significant advantages over conventional power line frequency systems; such as high reliability, long life, relatively little maintenance requirements, compact size and modular design.
Date: September 14, 1984
Creator: Praeg, W. F.
Item Type: Refine your search to only Article
open access

Analysis of the new GCFR upper and lower plenum flow-through shields

Description: Analysis of the proposed GCFR upper and lower plenum flow-through shields has been performed using both discrete ordinate (DOT) and Monte Carlo (MORSE) methods. Several shields having one change of direction in the coolant path (chevron) and two changes of direction (herringbone) were investigated. The shields were modeled as unit cells with periodic boundary conditions. From plenum fluence calculations and design constraints at the reactor vessel liner, it was determined that all the shield co… more
Date: September 14, 1980
Creator: Cramer, S.N. (Oak Ridge National Lab., TN); Reed, D.A.; Emmett, M.B. & Rouse, C.A.
Item Type: Refine your search to only Article
open access

Analysis of trapped gas in 1E34 detonators by gas chromatography

Description: A method was developed to extract and then analyze gas trapped in thermally aged 1E34 detonators. This gas was extracted into an evacuated volume and injected into a gas chromatograph for separation and quantitative analysis. To effect this gas extraction, a device was designed for puncturing the detonator cup and capturing the effused gas. Limited testing of five detonators in this device shows amounts of gas ranging from about 0.5 X 10 {sup -7} to 12 X 10 {sup - 7} moles.
Date: May 14, 1980
Creator: Warner, David K.; Back, Paul S. & Barnhart, Brady V.
Item Type: Refine your search to only Report
open access

Application of Microfabrication Technology to Thermionic Energy Conversion. Progress Report No. 5, August 1, 1980-October 31, 1980

Description: Considerable effort was directed toward the fabrication of a micron-spaced thermionic converter. In the process, a new technique has evolved which appears more promising and has been investigated theoretically. In both techniques, electrodes of similar differential thermal expansions are utilized to prevent shear stresses from disrupting the spacing pillars. The newer technique has additional advantages that simplify the fabrication of the diode structure, thus making it more practical. Progres… more
Date: November 14, 1980
Creator: Brodie, I. & Shepherd, C.
Item Type: Refine your search to only Report
open access

Application of power-factor correction in the Tandem Mirror Experiment Upgrade magnet power supply

Description: The magnet power supply for the Tandem Mirror Experiment Upgrade (TMX Upgrade) contains 24 groups of dc rectifiers that feed the water-cooled magnets. Each group consists of five or less rectifiers, connected in series. All 24 are current-regulating, using phase-controlled bilateral thyristors in the rectifier transformer primaries. The electric utility system must furnish reactive power to these phase-controlled thyristors as well as to the cmmutating diodes in the rectifier bridges.
Date: August 14, 1981
Creator: Corvin, W. C.
Item Type: Refine your search to only Article
open access

Argonne Plasma Wake-Field Acceleration Experiments

Description: Four years after the initial proposal of the Plasma Wake-field Accelerator (PWFA), it continues to be the object of much investigation, due to the promise of the ultra-high accelerating gradients that can exist in relativistic plasma waves driven in the wake of charged particle beams. These wake-fields are of interest both in the laboratory, for acceleration and focusing of electrons and positrons in future linear colliders, and in nature as a possible cosmic ray acceleration mechanism. The pur… more
Date: March 14, 1989
Creator: Rosenzweig, J. B.; Cole, B.; Gai, W.; Konecny, R.; Norem, J.; Schoessow, P. et al.
Item Type: Refine your search to only Article
open access

Aspects of B physics

Description: Various aspects of weak decays are commented on. Probing of the standard model and of phenomena beyond the standard model are discussed, followed by a theoretical view of B mesons and some experimental observations on B mesons. The point is made that any data on B decay would be interesting in that it would provide powerful new constraints in analyses of the standard model and extensions thereof. (LEW)
Date: October 14, 1987
Creator: Gaillard, M. K.
Item Type: Refine your search to only Article
open access

ATA diagnostic data handling system: an overview

Description: The functions to be performed by the ATA diagnostic data handling system are discussed. The capabilities of the present data acquisition system (System 0) are presented. The goals for the next generation acquisition system (System 1), currently under design, are discussed. Facilities on the Octopus system for data handling are reviewed. Finally, we discuss what has been learned about diagnostics and computer based data handling during the past year.
Date: June 14, 1984
Creator: Chambers, F.W.; Kallman, J.; McDonald, J. & Slominski, M.
Item Type: Refine your search to only Article
open access

Auxiliary plasma heating and fueling models for use in particle simulation codes

Description: Computational models of a radiofrequency (RF) heating system and neutral-beam injector are presented. These physics packages, when incorporated into a particle simulation code allow one to simulate the auxiliary heating and fueling of fusion plasmas. The RF-heating package is based upon a quasilinear diffusion equation which describes the slow evolution of the heated particle distribution. The neutral-beam injector package models the charge exchange and impact ionization processes which transfe… more
Date: March 14, 1989
Creator: Procassini, Richard J. & Cohen, Bbruce I.
Item Type: Refine your search to only Report
open access

Bank Failures: Recent Trends and Policy Options

Description: During the 1980s the U.S. banking industry has experienced a rapidly growing number of failures. Many factors have contributed to this trend including deregulation, technology, individual bank management, and economic conditions. The Federal Deposit Insurance Corporation (FDIC) handles insured bank failures. Congress has been monitoring the recent trend and is concerned with the FDIC’s ability to continue to perform its supervisory and insurance operations. The present situation, information on… more
Date: July 14, 1987
Creator: Smale, Pauline
Item Type: Refine your search to only Report
open access

Beta-Cephei variables. Lecture 1

Description: In discussing upper-main-sequence stars and their intrinsic pulsations, we need to realize that theory has not yet been able to understand these pulsations. In many discussions the character of the pulsations has been described, and in many cases these theoretical solutions of the stellar pulsation theory may be the actual ones occurring. But the specific driving mechanism, so well known for the yellow and red giants and supergiants, and very recently known for the white dwarf stars, remains th… more
Date: March 14, 1983
Creator: Cox, A. N.
Item Type: Refine your search to only Article
open access

Building 774A mini-melter restoration

Description: Large scale mechanical improvements were made on the 100th scale glass melter in building 774A following a shutdown in November, 1988. The circumstances regarding that shutdown were reported by P.M. Allen in DPST-89-345. By request, the Mechanical Development Group assumed responsibility for the work on SRL Service order DS-87042. This report describes the changes which were made, their purpose, and observations as to their effectiveness after approximately 4 weeks of operating with the improve… more
Date: April 14, 1989
Creator: Mensink, D. L.
Item Type: Refine your search to only Report
open access

Carbon-14 in waste packages for spent fuel in a tuff repository

Description: Carbon-14 is produced naturally by cosmic ray neutrons in the upper atmosphere. It is also produced in nuclear reactors, in amounts much smaller than the global inventory. About one-third of this is released directly to the atmosphere, and the other two-thirds remains in the spent fuel. Both the Environmental Protection Agency and the Nuclear Regulatory Commission have established limits on release of the {sup 14}C in spent fuel. This is of particular concern for the proposed repository in tuff… more
Date: October 14, 1986
Creator: Van Konynenburg, R.A.; Smith, C.F.; Culham, H.W. & Smith, H.D.
Item Type: Refine your search to only Report
open access

Casework in a Congressional Office

Description: This paper presents a general overview of congressional office procedures associated with handling casework, and the assistance provided by a Member of Congress to help constituents in their dealings with Federal agencies. It discusses options for assisting Member's constituents, and the role of staff and Members in providing casework services.
Date: December 14, 1982
Creator: Carlile, Judy
Item Type: Refine your search to only Report
open access

Catalysts for upgrading coal-derived liquids. Quarterly report, October 1-December 31, 1980

Description: A linear relationship represents the hydrogenation activity decay of catalysts used in four experimental runs reported previously. The weight percent hydrogen in the reactor product oils plotted against oil-catalyst contact time for experimental runs ZBB, ZBC, ZBD, and ZBE reveals a linear decay rate of 0.0083 wt% hydrogen per hour. This is one quantitative measure of catalyst activity decay. The data for the plot incorporate three different catalysts or combinations used to process a PAMCO liq… more
Date: January 14, 1981
Creator: Crynes, B.L.
Item Type: Refine your search to only Report
open access

Centrifugal space-charge forces in SLC

Description: A preliminary estimate is made of the effect of the centrifugal space charge forces on SLC assuming that the space-charge effect is a highly nonlinear force whose important term is the second derivative at the beam center. A scaling law is used to get the horizontal chromaticity for the arcs of SLC, and the space-charge effect on the beam is calculated on that basis. (LEW)
Date: April 14, 1986
Creator: Sands, M.
Item Type: Refine your search to only Report
open access

Changes and Developments in Electron Cyclotron Resonant Heating (ECRH) on the Tandem Mirror Experiment Upgrade (TMX-U)

Description: This paper will describe changes to the previously reported Electron Cyclotron Resonant Heating (ECRH) circular waveguide systems that deliver power to the Tandem Mirror Experiment Upgrade (TMX-U) machine. Four gyrotrons and associated waveguide systems, operating at 28-GHz and 200 kW each, helped establish electrostatic plugging in the end cells of TMX-U. A fifth gyrotron has been installed to power two resonant locations in the end plugs. This system and the pair of 10 kG heaters now use a sl… more
Date: November 14, 1985
Creator: Anderson, A. T.; Brooksby, C. A.; Calderon, M. O.; Ellis, R.; Felker, B.; Horton, R. D. et al.
Item Type: Refine your search to only Article
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