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Linear magnetic fusion: summary of Seattle workshop

Description: The linear-geometry magnetic confinement concept is among the oldest used in the study of high-temperature plasmas. However, it has generally been discounted as a suitable approach for demonstrating controlled thermonuclear fusion because rapid losses from the plasma column ends necessitate very long devices. Further, the losses and how to overcome them have not yet received parametric experimental study, nor do facilities exist with which such definitive experiments could be performed. Nonethe… more
Date: December 1, 1977
Partner: UNT Libraries Government Documents Department
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Hydrogenation of CO and CO/sub 2/ on clean rhodium and iron foils. Correlations of reactivities and surface compositions

Description: An experimental arrangement consisting of an ultrahigh vacuum bell jar equipped with an internal sample isolation cell was used to investigate the hydrogenation of CO over Fe and Rh surfaces. This apparatus permitted both UHV surface characterization (Auger electron spectroscopy, low-energy electron diffraction) and high pressure (1-20 atm) catalytic reactions to be carried out. Small surface area (approximately 1 cm/sup 2/) metal samples, both single crystals and polycrystalline foils, were us… more
Date: December 16, 1977
Creator: Dwyer, D.; Yoshida, K. & Somorjai, G.A.
Partner: UNT Libraries Government Documents Department
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Performance of the short-pulse oscillators for Argus and Shiva

Description: The large Nd:glass laser-fusion systems, such as Argus and Shiva, require short-pulse oscillators that are very reliable and predictable. The requirements go well beyond what can reasonably be expected from a passively mode-locked laser. An actively mode-locked and Q-switched oscillator has now been developed that is extremely reliable and predictable, and satisfies all the requirements for the present Nd:glass laser systems. These systems require pulses that are adjustable from less than 100 p… more
Date: October 1, 1977
Creator: Kuizenga, D.J. & Martin, W.E.
Partner: UNT Libraries Government Documents Department
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Simple scaling model for exploding pusher targets

Description: A simple model has been developed which when normalized by experiment or Lasnex calculations can be used to scale neutron yields for variations in laser input power and pulse length and target radius and wall thickness. The model also illucidates some of the physical processes occurring in this regime of laser fusion experiments. Within certain limitations on incident intensity and target geometry, the model scales with experiments and calculations to within a factor of two over six decades in … more
Date: November 4, 1977
Creator: Storm, E. K.; Larsen, J. T.; Nuckolls, J. H.; Ahlstrom, H. G. & Manes, K. R.
Partner: UNT Libraries Government Documents Department
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Design studies of a laser fusion power plant

Description: The conceptual design of a laser fusion power plant has been undertaken to exploit recent developments in target design. Advanced high-gain targets which have been developed make it possible to significantly relax the laser and optical system requirements. The power plant design features a reactor concept which utilizes a thick falling region of liquid lithium to protect the first-wall from the neutrons, x-rays, and charged particles that are produced in the thermonuclear microexplosion. The li… more
Date: October 7, 1977
Creator: Maniscalco, J. A.; Meier, W. R. & Monsler, M. J.
Partner: UNT Libraries Government Documents Department
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Support for a nuclear future: student response to the CRBRP

Description: Results are presented of a multiple regression analysis of questionnaire data from two random samples of University of Tennessee seniors. Data were collected from 94 students with science/engineering majors (the ''Tech'' sample), and 91 students with non-science/engineering majors (the ''Mass'' sample--which represents the majority of the students). The purpose of the analysis was to isolate factors which independently explain student response to the CRBRP and to breeder reactors in general.
Date: January 1, 1977
Creator: Bremseth, M. D. & Clelland, D. A.
Partner: UNT Libraries Government Documents Department
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Angular distributions of photoelectrons and non-thermal photoions from atoms and molecules. [Review]

Description: During the last ten years, photoelectron angular distributions have been used extensively to study the dynamics of the photoionization process in atoms and molecules. Some major advances in this body of work are reviewed with special emphasis on results emerging since the last Conference on VUV Radiation Physics three years ago. By far the greatest progress has occurred for atoms, where interest is focussed on improving zero-order (Hartree-Slater, Cooper-Zare) understanding of the asymmetry par… more
Date: January 1, 1977
Creator: Dehmer, J. L.
Partner: UNT Libraries Government Documents Department
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Neutralization of H/sup -/ beams with gas jets

Description: A test facility was constructed to create a compact curtain-shaped gas jet as a first-generation operational neutralizer for the 150 keV H/sup -/ beam. Different gases and vapors were considered, their optimum target thicknesses and neutralization efficiencies with respect to beam energies were explored. Two techniques of gas jet formation were compared. Multiparallel-channel effusive jets of CO/sub 2/ and H/sub 2/ were selected as test candidates.
Date: January 1, 1977
Creator: Lam, C. K.
Partner: UNT Libraries Government Documents Department
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Injection scenarios for TNS

Description: Neutral beam injection heating is the most technically advanced and experimentally proven form of auxiliary Tokamak heating. In TNS, due to its large size and density, the major problem is a lack of beam penetration. An attempt is made to determine the scope of the problem and outline possible strategies for dealing with it. Some of these strategies are: raise the injection energy, injection vertically into a locally produced minimum in the toroidal magnetic field so that the injected ions are … more
Date: January 1, 1977
Creator: Rome, J. A.; Peng, Y. K. M. & Davidson, J. N.
Partner: UNT Libraries Government Documents Department
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Requirements and new materials for fusion laser systems

Description: Higher focusable power in neodymium glass fusion lasers can be obtained through the use of new materials with lower nonlinear index (n/sub 2/) and better energy storage capabilities than the presently employed silicate glass. Silicate, phosphate, fluorophosphate, and beryllium fluoride glasses are discussed in terms of fusion laser requirements, particularly those for the proposed Nova laser. Examples of the variation in spectroscopic and optical properties obtainable with compositional changes… more
Date: October 1, 1977
Creator: Stokowski, S. E.; Weber, M. J.; Saroyan, R. A. & Hagen, W. F.
Partner: UNT Libraries Government Documents Department
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Plasma engineering considerations for an ignition test reactor: The Next Step (TNS) beyond TFTR

Description: Plasma engineering studies were done to establish credible ranges of physics parameters to be integrated into the TNS study program. The following are reviewed: high ..beta.. equilibrium, high density, basic assumptions, zero-dimensional scaling, one-dimensional effects, equilibrium evolution, injection scenario, MHD stability limits, equilibrium fields and flexibility. (MHR)
Date: January 1, 1977
Creator: Peng, Y. K. M.; Callen, J. D.; Marcus, F. B.; McNally, J. R., Jr.; Mense, A. T.; Uckan, N. A. et al.
Partner: UNT Libraries Government Documents Department
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Magnetic susceptibility of AnRe/sub 2/ compounds

Description: The compounds AnRe/sub 2/, where An = Th, U, Np, and Pu all have the MgZn/sub 2/-type hexagonal Laves phase structure. Measurements of their magnetic susceptibilities have been made from 2-300 K. Whereas ThRe/sub 2/, URe/sub 2/, and PuRe/sub 2/ have essentially temperature-independent susceptibilities, NpRe/sub 2/ is ferromagnetic with T/sub c/ = 47 K. The paramagnetic data for NpRe/sub 2/ follow a modified Curie-Weiss law, chi-che/sub 0/ = C/(T-THETA) from 60-230 K with THETA = 46.9 K and C eq… more
Date: January 1, 1977
Creator: Brodsky, M. B.; Trainor, R. J.; Aldred, A. T. & Sowers, C. H.
Partner: UNT Libraries Government Documents Department
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Highest temperatures recorded by the Oklo mineral phase assemblages and rock textures

Description: Biotite-bearing pelitic phase assemblages are observed in reactor zones 2 and 5 and up to at least 4 m outside of zone 2, indicating a minimum temperature in these regions of about 400/sup 0/C. Rock textures suggest that still higher temperatures may have been reached within the reactors.
Date: January 1, 1977
Creator: Vidale, R.
Partner: UNT Libraries Government Documents Department
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Theory of spin dependence at very high energies. [Review, S matrix]

Description: The point of view taken is to introduce a number of topics for possible discussion during the course of this workshop. Some of the theoretical expectations for polarization phenomena are reviewed assuming that hadrons are composite. Polarization phenomena are considered from an S-matrix point of view.
Date: January 1, 1977
Creator: Thomas, G. H.
Partner: UNT Libraries Government Documents Department
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New method to determine the chemical composition and structure of non-elemental acceptor and donor centers in ultra-pure germanium

Description: A new approach towards the understanding of hitherto unknown, non-elemental acceptors and donors which can limit the purity of ultra-pure germanium has been explored for a specific pair of shallow centers, designated A/sub 2/ and D. Using photoelectric spectroscopy, we have demonstrated that an isotope shift in the ground-state binding energy occurs when the germanium crystals are grown in pure deuterium instead of in the usual pure hydrogen atmosphere. This isotope shift is the most direct pro… more
Date: October 1, 1977
Creator: Haller, E.E.
Partner: UNT Libraries Government Documents Department
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Design of the core support and restraint structures for FFTF and CRBRP

Description: This paper presents and compares the design and fabrication of the FFTF and CRBRP reactor structures which support and restrain the reactor core assemblies. The fabrication of the core support structure (CSS) for the FFTF reactor was completed October 1972 and this paper discusses how the fabrication problems encountered with the FFTF were avoided in the subsequent design of the CRBR CSS. The radial core restraint structure of the FFTF was designed and fabricated such that an active system coul… more
Date: December 1, 1977
Creator: Sutton, H.G. & Rylatt, J.A.
Partner: UNT Libraries Government Documents Department
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Requirements for signal cables and off-line data processing

Description: The number and types of cables for various experiments planned for the ISABELLE storage rings are estimated, and the results of a questionnaire on anticipated data taking rates are discussed. Necessary data acquisition rates, data storage capabilities, and data processing rates are estimated. (PMA)
Date: August 15, 1977
Creator: Strand, R.
Partner: UNT Libraries Government Documents Department
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Energy balance measurements for Shiva

Description: The Lawrence Livermore Laboratory Shiva laser-target interaction facility is designed for experiments at 20 to 30 terawatts. At this power level there will be larger fluxes of neutrons, x-rays, electrons and ions than have been previously measured. The measurements of energy converted into the various reaction products is crucial both in target design and performance analysis of the actual experiment. The total energy absorbed is measured by a box calorimeter surrounding the target except for b… more
Date: October 24, 1977
Creator: Glaros, S.S.; Rupert, V.C.; Gunn, S.R.; Phillion, D.W. & Kornblum, H.N.
Partner: UNT Libraries Government Documents Department
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Eulerian method for large-displacement fluid-structure interaction in reactor containments

Description: An Eulerian method for analyzing large-displacement fluid-structure interaction in reactor containments is presented. The emphasis is on the development of a generalized hydrodynamic scheme to treat the irregular cells created by the movement of the structure with respect to the fixed Eulerian coordinates. A relaxation equation is derived from the boundary condition at the fluid-structure interface for the solution of the pressure at the interface. By combining this with the Poisson equation a … more
Date: January 1, 1977
Creator: Chang, Y. W. & Wang, C. Y.
Partner: UNT Libraries Government Documents Department
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Proceedings of the 1977 Isabelle Summer Workshop. [Seventy-four papers]

Description: A report is given of the activities of the 1977 ISABELLE Summer Workshop, held from July 18 to 29, 1977 at the Brookhaven National Laboratory. An abstract was prepared for each of the seventy-four separate presentations for inclusion in DOE Energy Research Abstracts (ERA). (PMA)
Date: July 18, 1977
Partner: UNT Libraries Government Documents Department
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Development of high-mechanical strength electrical insulations for tokamak toroidal field coils

Description: The electrical insulation for the TF (Toroidal Field) coils is subjected to a high interlaminar shear, tensile and compressive stresses. Two candidate epoxy/glass fiber systems using prepreg and vacuum impregnation techniques were evaluated. Specimens were prepared and processed under controlled conditions to simulate specification manufacturing procedures. The strengths of the insulation were measured in interlaminar shear, tension, compression, and combined shear and compression statically. S… more
Date: January 1, 1977
Creator: Burke, C.
Partner: UNT Libraries Government Documents Department
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Numerical methods for laser fusion

Description: The LASNEX computer code was developed to study the many interrelated physical processes important in the effort to achieve laser initiated fusion. It has been used to calculate the results of numerous laser plasma experiments and to design targets and determine desirable laser pulse characteristics for future experiments. Some processes, such as hydrodynamics, are well formulated in fundamental equations and can be solved with high accuracy by sophisticated numerical methods. Other processes, … more
Date: November 3, 1977
Creator: Zimmerman, G.B.
Partner: UNT Libraries Government Documents Department
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Chemiluminescence from the reaction of Ba /sup 3/D with nitric oxide

Description: The reaction of laser excited Ba*(/sup 3/D) states with nitric oxide is presented. BaO product is not detected, although the channel is thermodynamically open, and instead chemiluminescence is observed. Experiments which suggest that radiative recombination, Ba + NO ..-->.. BaNO* ..-->.. BaNO, is the observed reaction channel will also be presented.
Date: January 5, 1977
Creator: Johnson, S. A.; Solarz, R. W.; Dubrin, J. W. & Brotzmann, R.
Partner: UNT Libraries Government Documents Department
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Electrostatically driven plasma hydrodynamic instability. I. The failure of vacuum-insulated, long wavelength laser fusion pellets

Description: Longer wavelength (e.g., lambda = 10.5 ..mu..m) laser radiation generates relatively large fluxes of superthermal electrons that penetrate and preheat the cores of such pellets at early times in their implosion history, precluding their efficient subsequent compression. It has been proposed to separate the outermost shell of such pellets (onto which the laser light is directed) from its inner regions by a vacuum layer, thereby ''insulating'' these inner portions from superthermal electron degra… more
Date: October 1, 1977
Creator: Levermore, C. D.; Caflisch, R. E. & Wood, L. L.
Partner: UNT Libraries Government Documents Department
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