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3-body final states in peripheral heavy-ion collisions: nuclear clustering structure and projectile excitation revisited (open access)

3-body final states in peripheral heavy-ion collisions: nuclear clustering structure and projectile excitation revisited

Even though peripheral heavy-ion collisions are less violent than their central counterparts, the large energy exchange between the reactants often leaves the primary products in excited particle-unstable states whose subsequent decay leads to 3 or more nuclei emerging in the final exit channel. These post-reaction, predominantly sequential de-excitation processes can sometimes provide interesting structural information about the parent nuclei. In fact, provided these processes are well understood, one can employ them as probes for studying initial properties of the fragments. This report discusses results of two experiments that deal with (1) nonstatistical, rare decay modes of the projectile, and (2) internal excitation energy of the projectile- and target-like fragments in peripheral collisions. The physics addressed in each is different, but the experimental and data-analysis techniques are so similar that it is relevant to join them together.
Date: February 1, 1986
Creator: Chan, Y.; Chavez, E.; Gazes, S.B.; Kamermans, R.; Schmidt, H.R.; Siwek-Wilczynska, J. et al.
Object Type: Article
System: The UNT Digital Library
5-cm, no iron SSC 6-m dipole test program (open access)

5-cm, no iron SSC 6-m dipole test program

Magnet Design B for the Superconducting Super Collider (SSC) consists of a 5 cm diameter collared coil assembly 12 m long with concentric aluminum thermal shields at 10 K and 80 K, a G-10 post type support system and a minimal iron vacuum vessel located at a large radius from the coil. In order to determine the behavior of such a magnet under both direct current and quenching conditions, a 6 m model was built using Tevatron tooling to produce a 7.6 cm diameter coil. The dc operation demonstrated that the post type suspension has acceptable rigidity. Distortions in the aluminum thermal shield during quench resulted from stresses in the material below the yield values. Temperature increases in the thermal shield due to eddy currents were larger than those calculated using simple assumptions, demonstrating the value of using a model to verify eddy current behavior in complex situations.
Date: February 1, 1986
Creator: Mazur, P. O.; Carson, J. A.; Engler, N. H.; Fisk, H. E.; Gonczy, J. D.; Hanft, R. W. et al.
Object Type: Article
System: The UNT Digital Library
AGS experiments: 1984, 1985, 1986. Third edition (open access)

AGS experiments: 1984, 1985, 1986. Third edition

Brief summaries are given of 44 different experiments either running or scheduled to run at the Brookhaven National Laboratory Alternating Gradient Synchrotron, as well as the experiment schedules. The beam parameters and fluxes are tabulated. Illustrations are given of both the experimental area layouts and the apparatus for each experiment. (LEW)
Date: February 1, 1986
Creator: Depken, J. C.
Object Type: Report
System: The UNT Digital Library
Amplifier-Discriminator-Multiplexor card (open access)

Amplifier-Discriminator-Multiplexor card

The Amplifier-Discriminator-Multiplexor (ADM) card described was designed for the External Muon Identifier at the 15 ft Bubble Chamber. The general scheme of the data readout of the External Muon Identifier is based on the use of a master clock. The ADM card serves to amplify the signals from the proportional tubes, discriminate them, latch the signals in parallel into a shift register. The data are then shifted out serially to the Time Digitizing System, using the master clock. The shift registers are loaded, and the latches are reset every sixteen cycles of the master clock. (LEW)
Date: February 1, 1986
Creator: Graupman, D.
Object Type: Report
System: The UNT Digital Library
Angular distribution of power from an undulator and a wiggler on a 6-GeV storage ring (open access)

Angular distribution of power from an undulator and a wiggler on a 6-GeV storage ring

There are two fundamental reasons to have a full knowledge of the angular distribution of power from an insertion device: 1. To evaluate the heat-load distribution on the first optical element in a beamline. 2. To estimate the total radiated power which will impinge on the walls of an insertion device. This is important to ensure needed cooling of the insertion device walls. The photodesorption is another closely related phenomenon determined by the exposure of the insertion device walls to the radiated power and of consequence to the successful operation of the storage ring. In this paper, we will primarily focus on undulators, but also consider situations as the value of K increases to the wiggler regime. These calculations are very involved and cumbersome and we shall only present some specific results related to the 6-GeV insertion devices.
Date: February 1, 1986
Creator: Shenoy, G. K.
Object Type: Report
System: The UNT Digital Library
Annual Review: BPA-Funded Resident Fish and Wildlife Projects : Fiscal Year 1985, Annual Project Presentation : January 14-16, 1986, Holiday Inn, Spokane, Washington. (open access)

Annual Review: BPA-Funded Resident Fish and Wildlife Projects : Fiscal Year 1985, Annual Project Presentation : January 14-16, 1986, Holiday Inn, Spokane, Washington.

None
Date: February 1, 1986
Creator: United States. Bonneville Power Administration.
Object Type: Report
System: The UNT Digital Library
Annual Review of BPA-Funded Anadromous Fish Projects, March 18-20, 1986, Holiday Inn Airport, Portland, Oregon. (open access)

Annual Review of BPA-Funded Anadromous Fish Projects, March 18-20, 1986, Holiday Inn Airport, Portland, Oregon.

This report contains descriptions of projects specifically related to anadromous salmonids. They include projects in the following categories: (1) fish and wildlife projects in western Montana; (2) fish health and physiology; (3) habitat enhancement and passage improvement - Oregon I; (4) passage improvement and natural propagation - Washington; (5) habitat enhancement and passage improvements - Oregon II; (6) future hydroelectric assessments; (7) habitat enhancement and passage improvement - Idaho; (8) downstream migration: flows and monitoring; (9) downstream migration: reservoir impacts; and (10) habitat evaluation and monitoring. (ACR)
Date: February 1, 1986
Creator: United States. Bonneville Power Administration.
Object Type: Report
System: The UNT Digital Library
Anomalous thermal confinement in ohmically heated tokamaks (open access)

Anomalous thermal confinement in ohmically heated tokamaks

A model is proposed to explain the behavior of the gross energy confinement time in ohmically heated tokamak plasmas. The analysis takes into account the effect of the anomalous thermal conductivity due to small scale turbulence and of the macroscopic MHD behavior, which provides some constraints on the temperature profile. Results indicate that the thermal conductivity associated with the dissipative trapped-electron mode and with the ion temperature gradient (eta/sub i/) mode can account, respectively, for the Neo-Alcator scaling and the saturation of the energy confinement time with density. Comparisons with experimental results show reasonable agreement. 32 refs., 12 figs.
Date: February 1, 1986
Creator: Romanelli, F.; Tang, W. M. & White, R. B.
Object Type: Report
System: The UNT Digital Library
Application of bridging methods for standard HTGR [High-Temperature Gas-Cooled Reactor] licensing bases (open access)

Application of bridging methods for standard HTGR [High-Temperature Gas-Cooled Reactor] licensing bases

A review of the bridging methods is accomplished by providing an application of the process to the standard HTGR. A representative PRA, of limited range, is used in the process, and representative deterministic licensing bases are obtained. The PRA is presented as a risk plot, and the characteristics of the events and the equipment in the PRA are used in the bridging application. Representative licensing basis events are identified consisting of anticipated operational occurrences, design basis events, and emergency planning basis events. Representative safety-related functions and safety-related structures, systems and components are identified. The licensing basis events and safety-related functions and equipment are representative of the deterministic licensing bases that will be included in the PSID and SARs. A response is requested from NRC on the acceptability of the application of the method, considering the range of the representative PRA presented.
Date: February 1, 1986
Creator: Houghton, W.J. & Parme, L.L.
Object Type: Report
System: The UNT Digital Library
Applications guide to pedestrian SNM monitors (open access)

Applications guide to pedestrian SNM monitors

The applications guide introduces readers to the pedestrian special nuclear material (SNM) monitors that provide nuclear material control at DOE contractor facilities. It explains the principles of operation, the strong and weak points, and steps for calibration and maintenance of the monitors. Administrators and security specialists will find an overview of pedestrain monitor application and upkeep in Part 1 of the guide and a descriptive catalog of present-day monitors in Part 3. Technically oriented readers will be interested in the more detailed discussion of SNM monitoring physics and SNM monitor design principles found in Part 2. 18 refs., 33 figs., 9 tabs.
Date: February 1, 1986
Creator: Fehlau, P. E.
Object Type: Report
System: The UNT Digital Library
Applications of TEMCO to the spheromak and the reversed field pinch (open access)

Applications of TEMCO to the spheromak and the reversed field pinch

This paper deals with two subjects. One concerns the use of consistent boundary conditions when performing MHD simulations of the reversed field pinch. Of particular concern is the choice of constant current, which when combined with other commonly used boundary conditions, could lead to an inconsistency. The second subject area is that of MHD simulation of the CTX spheromak. A summary of results since the 1984 3-D MHD Workshop is presented.
Date: February 1, 1986
Creator: Mirin, A. A. & Sgro, A. G.
Object Type: Article
System: The UNT Digital Library
Background information for programs to improve the energy efficiency of Northwest residential rental property (open access)

Background information for programs to improve the energy efficiency of Northwest residential rental property

This report was prepared for the Office of Conservation, Bonneville Power Administration. The report will be used by the Office as background information to support future analysis and implementation of electricity conservation programs for owners of residential rental housing in the Northwest. The principal objective of the study was to review market research information relating to attitudes and actions of Northwest rental housing owners and, to a lesser extent, tenants toward energy conservation and energy-efficiency improvements. Available market research data on these subjects were found to be quite limited. The most useful data were two surveys of Seattle rental housing owners conducted in late 1984 for Seattle City Light. Several other surveys provided supplemental market research information in selected areas. In addition to market research information, the report also includes background information on rental housing characteristics in the Northwest.
Date: February 1, 1986
Creator: Hendrickson, P.L.
Object Type: Report
System: The UNT Digital Library
Bio-leaching of toxic metals from geothermal waste. A preliminary engineering analysis (open access)

Bio-leaching of toxic metals from geothermal waste. A preliminary engineering analysis

The feasibility of a biological facility to treat geothermal sludge from a base case 50-MW double-flash geothermal power plant in the Imperial Valley, California was evaluated. The effect of sludge and nutrient concentration, agitation air bubbling and sterility on the rate of metal solubilization by the bacteria Thiobacillus thiooxidans and ferrooxidans was examined. All experiments were performed in batch flasks and monitored daily for bacterial growth. T. Thiooxidans leached 36% of the zinc in the sludge after 288 hr but leached little chromium. T. ferrooxidans removed 60% of the chromium in the sludge after 250 hr but did not leach zinc. Sludge to medium ratios of greater than 10% were toxic to the microorganisms studied. the experimental results were used to design a biological solid-waste treatment plant. The design basis used was 5 wt % sludge in the leaching vessel with a residence time of 10 days. The non-regulated waste resulting from the treatment plant could be used for land fill or construction materials. The total capital cost for the bio-leaching plant is $3.3 million with an annual operating cost of $690,000. The total cost of this plant is about 0.2 cents/kWh of electricity produced, which is essentially the same …
Date: February 1, 1986
Creator: Dobryn, D. G.; Brisson, A. L.; Lee, C. M. & Roll, S. M.
Object Type: Report
System: The UNT Digital Library
Bowing of solid breeder fuel pins and multiplier rods in a pin-type fusion blanket (open access)

Bowing of solid breeder fuel pins and multiplier rods in a pin-type fusion blanket

The most important outcome of this bowing analysis is the determination of the number of internal breeder rod supports required for good thermal performance. Although many effects were considered, the swelling deformations were the most restrictive in terms of the peak deflections. It appears that three internal supports should be sufficient to keep the rod bowing below acceptable levels without significantly raising the structure-to-breeder ratio. The most severe interaction problem involved the last multiplier row and the first breeder row. Because the Be rods deflect very little, this problem can be alleviated by leaving enough space between these two zones. The spacing can be tighter elsewhere. A more detailed analysis of the multiplier rod bowing caused by the damage gradient must be analyzed before this can be verified.
Date: February 1, 1986
Creator: Blanchard, J. P. & Ghoniem, N. M.
Object Type: Report
System: The UNT Digital Library
BWR spent fuel storage cask performance test. Volume 1. Cask handling experience and decay heat, heat transfer, and shielding data (open access)

BWR spent fuel storage cask performance test. Volume 1. Cask handling experience and decay heat, heat transfer, and shielding data

This report documents a heat transfer and shielding performance test conducted on a Ridihalgh, Eggers and Associates REA 2023 boiling water reactor (BWR) spent fuel storage cask. The testing effort consisted of three parts: pretest preparations, performance testing, and post-test activities. Pretest preparations included conducting cask handling dry runs and characterizing BWR spent fuel assemblies from Nebraska Public Power District's Cooper Nuclear Station. The performance test matrix included 14 runs consisting of two loadings, two cask orientations, and three backfill environments. Post-test activities included calorimetry and axial radiation scans of selected fuel assemblies, in-basin sipping of each assembly, crud collection, video and photographic scans, and decontamination of the cask interior and exterior.
Date: February 1, 1986
Creator: McKinnon, M. A.; Doman, J. W.; Tanner, J. E.; Guenther, R. J.; Creer, J. M. & King, C. E.
Object Type: Report
System: The UNT Digital Library
Characterization of the National Low-Temperature Neutron Irradiation Facility (open access)

Characterization of the National Low-Temperature Neutron Irradiation Facility

The National Low-Temperature Neutron Irradiation Facility (NLTNIF) is now operating at the Bulk Shielding Reactor at ORNL. The facility provides high radiation intensities and special environmental and testing conditions for qualified experiments at no cost to users. A general description and major specifications of the NLTNIF are presented along with the results of performance tests. In addition, the hardware and other considerations required to perform experiments in the NLTNIF are described.
Date: February 1, 1986
Creator: Kerchner, H. R.; Coltman, R. R., Jr.; Klabunde, C. E. & Young, F. W., Jr.
Object Type: Article
System: The UNT Digital Library
Chemical Profiles of Microalgae with Emphasis on Lipids: Final Report (open access)

Chemical Profiles of Microalgae with Emphasis on Lipids: Final Report

This final report details progress during the third year of this subcontract. The overall objective of this subcontract was two fold: to provide the analytical capability required for selecting microalgae strains with high energy contents and to develop fundamental knowledge required for optimizing the energy yield from microalgae cultures. The progress made towards these objectives during this year is detailed in this report.
Date: February 1, 1986
Creator: Benemann, J. R.; Tillett, D. M.; Suen, Y.; Hubbard, J. & Tornabene, T. G.
Object Type: Report
System: The UNT Digital Library
Chirped accelerator (open access)

Chirped accelerator

None
Date: February 1, 1986
Creator: Lippmann, B.A.
Object Type: Report
System: The UNT Digital Library
The Christian Chronicle (Oklahoma City, Okla.), Vol. 43, No. 2, Ed. 1 Saturday, February 1, 1986 (open access)

The Christian Chronicle (Oklahoma City, Okla.), Vol. 43, No. 2, Ed. 1 Saturday, February 1, 1986

Monthly newspaper from Oklahoma City, Oklahoma that includes news and information about the Churches of Christ along with advertising.
Date: February 1, 1986
Creator: Norton, Howard W. & McMillion, Joy L.
Object Type: Newspaper
System: The Portal to Texas History
Collapse of Defect Cascades to Dislocation Loops During Self-Ion Irradiations of Fe, Ni and Cu at 30, 300 and 600/sup 0/K (open access)

Collapse of Defect Cascades to Dislocation Loops During Self-Ion Irradiations of Fe, Ni and Cu at 30, 300 and 600/sup 0/K

The formation of dislocation loops by self-ion irradiations of Fe, Ni and Cu has been studied in situ in the ANL High-Voltage Electron Microscope as functions of ion dose and irradiation temperature. At low doses (less than or equal to 10/sup 12/ ions/cm/sup 2/) at room temperature individual cascades were observed to collapse to vacancy dislocation loops in Cu with high probability, in Ni with lower probability, and in Fe with zero probability. Cascade collapse was observed at low doses at 30/sup 0/K in Cu and Ni, but at rates less than their respective rates at room temperature. A loop formation rate for Ni at 600/sup 0/K is also reported. At higher doses (>10/sup 13/ ions/cm/sup 2/) where overlap of cascades becomes significant, loops were first observed in Fe and with a supra-linear build-up with dose. Also at higher doses a decrease in loop production rate in Cu and Ni was observed due to loop coalescence. The materials and temperature dependence of cascade collapse probabilities are suggested to be related to thermal spike mechanisms during the cascade formation lifetime.
Date: February 1, 1986
Creator: Kirk, M. A.; Robertson, I. M.; Vetrano, J. S.; Jenkins, M. L. & Funk, L. L.
Object Type: Article
System: The UNT Digital Library
Collapse of Defect Cascades to Dislocation Loops in Cu3Au (open access)

Collapse of Defect Cascades to Dislocation Loops in Cu3Au

TEM and ordered Cu/sub 3/Au were employed to measure the probability of dislocation loop formation as functions of irradiating ion mass (Ar/sup +/, Cu/sup +/ and Kr/sup +/), energy (50 and 100 keV), and irradiation temperature (30 and 300/sup 0/K). Disordered zones were produced at every defect cascade site and imaged in dark-field superlattice reflections. Dislocation loops were imaged in fundamental reflections in the same sample areas to produce an accurate measurement of the probability of the collapse of each cascade to a dislocation loop, within a large set (approx.200) of defect cascades for each irradiation condition. The size distributions of dislocation loops and disordered zones were also measured. Defect cascades collapse to dislocation loops with significant probability (approx.0.5) even at 30/sup 0/K. Other observations include an increasing collapse probability with increasing cascade energy density (increasing ion mass) and with increasing sample irradiation temperature. However, no additional collapse was observed upon annealing from 30 to 300/sup 0/K, and no increase in collapse probability was observed upon increasing the bombarding ion energy from 50 to 100 keV. Disordered zone sizes also increased with increasing ion mass and with increasing sample irradiation temperature (30 to 300/sup 0/K).
Date: February 1, 1986
Creator: Black, T. J.; Jenkins, M. L.; English, C. A. & Kirk, M. A.
Object Type: Article
System: The UNT Digital Library
Comparison of collision operators for drift and MHD-interchange modes in unsheared slab geometry (open access)

Comparison of collision operators for drift and MHD-interchange modes in unsheared slab geometry

The general procedure for the kinetic analysis of low-frequency electrostatic and electromagnetic modes in toroidal geometry is now well known. In the collisionless limit, the relevant dynamics (e.g., trapped particles, resonances, etc.) can be treated appropriately. However, with the introduction of collisional effects, it is customary, for tractability, to employ model collision operators which do not rigorously satisfy all conservation properties of more exact collision operators. Insight into the essential required features of such operators can be gained by studying models with increasing levels of completeness for a simpler, unsheared slab geometry. The results presented here for this simpler geometry can provide guidance in choosing model collision operators for toroidal-geometry kinetic calculations. 6 refs., 3 figs.
Date: February 1, 1986
Creator: Rewoldt, G.; Tang, W.M. & Hastie, R.J.
Object Type: Report
System: The UNT Digital Library
Comparison of two-dimensional and three-dimensional MHD equilibrium and stability codes (open access)

Comparison of two-dimensional and three-dimensional MHD equilibrium and stability codes

Stability results obtained with the fully three-dimensional magnetohydrodynamic code BETA, the helically invariant code HERA, and the asymptotic stellarator expansion code STEP agree well for a straight l = 2, M = 5 stellarator model. This good agreement between the BETA and STEP codes persists as toroidal curvature is introduced. This validation provides justification for confidence in work with these models. 20 refs., 11 figs.
Date: February 1, 1986
Creator: Herrnegger, F.; Merkel, P. & Johnson, J. L.
Object Type: Report
System: The UNT Digital Library
Comparison of various sink strengths for analyzing radiation creep, growth and swelling (open access)

Comparison of various sink strengths for analyzing radiation creep, growth and swelling

The essential physics involved in the reaction-rate-theory analysis of radiation effects at temperatures where both vacancies and self interstitials are mobile is contained in the expressions used for the strengths of distributed point-defect sinks such as dislocations, cavities and grain boundaries. These sink strengths have been obtained by various authors in distinctly different ways, thus giving rise to some possible confusion in comparing the various results. This is even more true with respect to the effect of interaction fields on these sink strengths and the so-called bias factors or sink efficiencies have been defined in entirely different ways, thus rendering quantitative comparisons difficult. We present here a comparison of several procedures in the literature, and attempt to make reasonable quantitative comparisons.
Date: February 1, 1986
Creator: Nichols, F. A. & Liu, Y. Y.
Object Type: Article
System: The UNT Digital Library