Heavy mass states (open access)

Heavy mass states

The indirect evidence for the production of a heavy lepton and direct evidence for the product of a new hadronic state or states in proton-proton interactions is considered for the interpretation requiring the existence of two more leptons and two new quarks. It is shown that such a picture is consistent and in good agreement with existing data. The new structure is located at M = 9.54 GeV/c/sup 2/ and is much wider than the experimental resolution. Also it is asymmetric, suggesting the presence of several resonances. 7 references. (JFP)
Date: August 23, 1977
Creator: Paschos, E. A.
System: The UNT Digital Library
''Figure of merit'' Q/. mu. /sub max//sup 2/3/, for beam transport through periodic focussing systems (open access)

''Figure of merit'' Q/. mu. /sub max//sup 2/3/, for beam transport through periodic focussing systems

A discussion is given of a figure of merit indicative of the stability of high intensity beam transport systems. A table is provided giving this quantity under various conditions, and the limits for solenoidal focusing systems are obtained. (PMA)
Date: November 23, 1977
Creator: Laslett, L.J.
System: The UNT Digital Library
Engineering problems of future neutral beam injectors (open access)

Engineering problems of future neutral beam injectors

Because there is no limit to the energy or power that can be delivered by a neutral-beam injector, its use will be restricted by either its cost, size, or reliability. Studies show that these factors can be improved by the injector design, and several examples, taken from mirror reactor studies, are given.
Date: November 23, 1977
Creator: Fink, J.
System: The UNT Digital Library
40-kV, 25-ms neutral-beam power supply for TMX (open access)

40-kV, 25-ms neutral-beam power supply for TMX

Modifications are described to upgrade the neutral-beam power supply for the TMX from 40 kV, 10 ms to 40 kV, 25 ms. The redesign of the accel and suppressor power supplies to achieve separation of the high-voltage and control sections, operation of the arc pulse lines in series, operation of the arc pulse lines in a noisy environment with SCR trigger and crowbar, and modifications to the electrolytic storage banks are discussed.
Date: September 23, 1977
Creator: Leavitt, G.A.
System: The UNT Digital Library
Nuclear design of fast hybrid blankets (open access)

Nuclear design of fast hybrid blankets

The objective of this presentation is to: (1) present the physical motivation for fusion-fission hybrids, (2) outline design considerations for hybrid blankets, and (3) discuss the nuclear performance potential of hybrid blankets.
Date: January 23, 1978
Creator: Lee, J. D.
System: The UNT Digital Library
Heat transfer research and power cycle transient modeling (open access)

Heat transfer research and power cycle transient modeling

Fine axial flutes enhance heat transfer in vertical shell-and-tube exchangers with water inside the tubes and ammonia evaporating or condensing in layer flow on the shell side. Single-tube experiments with R-11 and ammonia indicate local shell-side coefficients 3 to 5 times those for corresponding smooth tubes. Single-tube experiments with water indicate that at moderate velocities the tube-side coefficients are enhanced by a factor equal to the ratio of fluted-to-smooth surface areas while the fluid friction is similarly increased. The experimental data are transformed into mean individual coefficients for ammonia and water. Overall coefficients for a particular case are presented to illustrate the efficacy of enhancement by flutes on one or both sides of the heat transfer surface. Means are described for using emerging data to predict the static and dynamic behavior of the power cycle and the interactions of components throughout the complete power plant.
Date: March 23, 1977
Creator: Rothfus, R.R. & Neuman, C.P.
System: The UNT Digital Library
Geothermal binary fluid cycle: heat exchanger area requirements and initial costs (open access)

Geothermal binary fluid cycle: heat exchanger area requirements and initial costs

None
Date: September 23, 1975
Creator: Giedt, W. H.
System: The UNT Digital Library
Characterization techniques for high quality ICF targets (open access)

Characterization techniques for high quality ICF targets

To avoid the effects of fluid instabilities, stringent requirements must be imposed on the surface quality and wall thickness uniformity of fuel pellets used in Inertial Confinement Fusion compression experiments. A systematic method was developed for specifying the type of defects which must be avoided and for evaluating measurement techniques for their suitability for detecting these defects. A review is given of the techniques currently available and those under development to show the relationship between these capabilities and the current and future requirements for pellet uniformity. The speed of these techniques and the implications for automated production of fuel pellets for a reactor are discussed.
Date: March 23, 1979
Creator: Weinstein, B.W. & Hendricks, C.D.
System: The UNT Digital Library
Decontamination methods (open access)

Decontamination methods

This paper discusses decontamination methods for LWRs. Emphasis is on the chemical cleaning of primary systems and contaminated equipment and components. The equipment is composed primarily of stainless steel, Inconel, Zircaloy, and a few other materials. Variables affecting efficiency are discussed. 10 figures. (DLC)
Date: May 23, 1979
Creator: Perrigo, L. D. & Divine, J. R.
System: The UNT Digital Library
Using computer graphics to analyze the placement of neutral-beam injectors for the Mirror Fusion Test Facility (open access)

Using computer graphics to analyze the placement of neutral-beam injectors for the Mirror Fusion Test Facility

To optimize the neutral-beam current incident on the fusion plasma and limit the heat load on exposed surfaces of the Mirror Fusion Test Facility magnet coils, impingement of the neutral beams on the magnet structure must be minimized. Also, placement of the neutral-beam injectors must comply with specifications for neutral-current heating of the plasma and should allow maximum flexibility to accommodate alternative beam aiming patterns without significant hardware replacement or experiment down-time. Injector placements and aimings are analyzed by means of the Structural Analysis Movie Post Processor (SAMPP), a general-purpose graphics code for the display of three-dimensional finite-element models. SAMPP is used to visually assemble, disassemble, or cut away sections of the complex three-dimensional apparatus, which is represented by an assemblage of 8-node solid finite elements. The resulting picture is used to detect and quantify interactions between the structure and the neutral-particle beams.
Date: September 23, 1977
Creator: Horvath, J. A.
System: The UNT Digital Library
Diffraction Radiation by a Line Charge Moving Past a Comb: A Model of Radiation Losses in an Electron Ring Accelerator (open access)

Diffraction Radiation by a Line Charge Moving Past a Comb: A Model of Radiation Losses in an Electron Ring Accelerator

A calculation is given of the radiated energy loss from a charged rod which moves at constant speed past an infinite set of parallel semi-infinite conducting plates of infinitesimal thickness, with the rod taken parallel to and at a fixed distance from the plate edges. The problem is analyzed using the Wiener-Hopf technique, and the resulting formulas are evaluated analytically in the limits of high rod speed and low rod speed, and compared with numerical evaluation over the full range of speeds.
Date: April 23, 1970
Creator: Hazeltine, R. D.; Rosenbluth, M. N. & Sessler, A. M.
System: The UNT Digital Library
Fatigue-crack propagation response of two nickel-base alloys in a liquid sodium environment (open access)

Fatigue-crack propagation response of two nickel-base alloys in a liquid sodium environment

The elevated temperature fatigue-crack propagation response of Inconel 600 and Inconel 718 was characterized within a linear-elastic fracture mechanics framework in air and low-oxygen liquid sodium environments. The crack growth rates of both nickel-base alloys tested in liquid sodium were found to be considerably lower than those obtained in air. This enhanced fatigue resistance in sodium was attributed to the very low oxygen content in the inert sodium environment. Electron fractographic examination of the Inconel 600 and Inconel 718 fatigue fracture surfaces revealed that operative crack growth mechanisms were dependent on the prevailing stress intensity level. Under low growth rate conditions, Inconel 600 and Inconel 718 fracture surfaces exhibited a faceted, crystallographic morphology in both air and sodium environments. In the higher growth rate regime, fatigue striations were observed; however, striations formed in sodium were rather ill-defined. These indistinct striations were attributed to the absence of oxygen in the liquid sodium environment. Striation spacing measurements were found to be in excellent agreement with macroscopic growth rates in both environments.
Date: January 23, 1979
Creator: Mills, W. J. & James, L. A.
System: The UNT Digital Library
Permeability of generic repository rocks at simulated in situ conditions. [Comparison of Westerly granite and White Lake genissic granite] (open access)

Permeability of generic repository rocks at simulated in situ conditions. [Comparison of Westerly granite and White Lake genissic granite]

New laboratory data are reported on the effect of confining (lithostatic) pressure, pore-water pressure, and principal stress difference on permeability of Westerly granite and White Lake gneissic granite. Permeabilities as low as 10/sup -19/ cm/sup 2/ (10/sup -11/ D) have been measured successfully, using a transient technique. Principal strains, electrical conductivity, and compressional velocity are determined simultaneously. Applied loads on the 15-cm diameter by 28-cm long test sample are controlled automatically and all data are taken by a microcomputer. Results on the gneissic granite indicate permeabilities of 10/sup -18/ to 10/sup -19/ cm/sup 2/ that appear to be unaffected either by effective pressure or by stress. The granite yields permeabilities of 4x10/sup -16/ cm/sup 2/ that decrease by a factor of two with pressure and vary by a factor of two with stress. When compared to the initial value, compressional velocities increase by 4% and conductivity decreases by 50% as pressure is increased to 50 MPa in the gneissic granite. In granite, these become 3% and 58%, respectively. At pressure, loading of the granite of 0.5 of failure stress increases conductivity by about 20%.
Date: April 23, 1979
Creator: Heard, H.C.; Trimmer, D.; Duba, A. & Bonner, B.
System: The UNT Digital Library
Dual-laser flow cytometry of single mammalian cells. [Performance of low-power argon and high-power krypton laser system for quantitative analysis and sorting of cells] (open access)

Dual-laser flow cytometry of single mammalian cells. [Performance of low-power argon and high-power krypton laser system for quantitative analysis and sorting of cells]

An improved dual-laser flow cytometric system for quantitative analysis and sorting of mammalian cells has been developed using a low-power argon and high-power krypton laser as illumination sources, thus permitting the excitation of fluorescent dyes having absorption regions ranging from the ultraviolet to infrared. Cells stained in liquid suspension with fluorescent dyes enter a flow chamber where they intersect two spatially separated laser beams. Separate pairs of quartz beam-shaping optics focus each beam onto the cell stream. Electro-optical sensors measure fluorescence and light scatter from cells that are processed electronically and displayed as frequency distribution histograms. Cells also can be electronically separated and microscopically identified. The ease and versatility of operation designed into this system represent a marked technological improvement for dual-laser excited flow systems. Details of this instrument are described along with illustrative examples of cells stained with mithramycin and rhodamine and analyzed for DNA content, total protein, and nuclear and cytoplasmic diameter.
Date: April 23, 1978
Creator: Steinkamp, J.A.; Orlicky, D.J. & Crissman, H.A.
System: The UNT Digital Library
Real-time delay monitor for flow-system cell sorters (open access)

Real-time delay monitor for flow-system cell sorters

For optimum performance in cell sorting, it is critical to assure proper timing in the charging of droplets to be deflected. A method for determining the transit delay time in cell sorters has been devised and applied to daily operation in the Los Alamos sorter systems. This delay monitor relies on detection of either scattered or absorbed light from cells in the fluid stream near the point of droplet breakoff.
Date: April 23, 1978
Creator: Martin, J.C.; McLaughlin, S.R. & Hiebert, R.D.
System: The UNT Digital Library
Fabrication and Delivery of Cryogenic Targets for Laser Fusion Experiments (open access)

Fabrication and Delivery of Cryogenic Targets for Laser Fusion Experiments

In designs for high gain targets for laser driven inertial confinement fusion, the deuterium-tritium fuel is at cryogenic temperatures. We are adapting cryogenic target fabrication techniques to the high power Shiva Laser Facility. The complex but compact cryogenic system which meets the Shiva laser requirements is described.
Date: August 23, 1978
Creator: Woerner, Robert L.; Bell, James W. & Steward, W. Gene
System: The UNT Digital Library
Three-phase region of D/sub 2/-DT-T/sub 2/ (open access)

Three-phase region of D/sub 2/-DT-T/sub 2/

Analogous to the triple point of a pure substance are a binary mixture's triple line and a ternary mixture's three-phase surface, where pressure, temperature, and composition must all be considered. The first three-phase study on a ternary hydrogen system, D/sub 2/-DT-T/sub 2/, is reported.
Date: June 23, 1977
Creator: Souers, P. C.; Kelly, E. M.; Roberts, P. E.; Fearon, D. & Tsugawa, R. T.
System: The UNT Digital Library
X-ray instrumentation in the LLL Laser-Fusion Program (open access)

X-ray instrumentation in the LLL Laser-Fusion Program

The LLL Laser-Fusion Program includes an active experimental effort to measure the distributions in energy, space and time of pulses of soft x-rays (.2 to 10 keV) radiated by laser-induced plasmas. Requirements for high resolution in these measurements clearly preclude the use of conventional x-ray diagnostic techniques. The following examples from our program of advanced x-ray instrument development are described. (1) Wavelength-dispersive spectrographs with fractional-electron volt resolution at several keV and imaging systems with 3 micron resolution over a 100 micron source. (2) Advanced solid state x-ray sensors that recover data from these instruments in a more expedient manner than photographic film. (3) Microcomputer-controlled stand-alone spectrograph data systems and minicomputer-based integrated systems that can deal with the large array of data generated by the high resolution instruments. (4) An electrostatically-deflected x-ray streak camera with moderate spectral and spatial resolution and a timing resolution of better than 15 ps.
Date: June 23, 1976
Creator: Koppel, L. N.
System: The UNT Digital Library
Data collected by the Shock Wave Data Center (open access)

Data collected by the Shock Wave Data Center

The Shock Wave Data Center of the Lawrence Livermore Lab collects and disseminates P.V.E. data obtained with shock waves. It has been in existence since 1964. An extensive number of papers reporting shock data had become available by that time. This was so in spite of the fact that the technology was developed only during the 2nd World War. Collection and partial evaluation of this data was therefore of value to facilitate its use by our laboratory and others who were involved with science and engineering in the high pressure field. The pressure range of the data collected is quite extensive and extends from 1 MPa to 1 TPa. One very important difference between shock wave compression data and those obtained with static presses must be emphasized, since it is often not fully appreciated. The pressure-volume locus of shock wave states (Hugoniot), which is obtained by passing increasingly stronger shocks into samples with the same initial state, rapidly increases in temperature as the shocks get stronger and the pressure and compression get higher. As a consequence, this Hugoniot locus must have a lower compressibility than isotherms obtained under static conditions. In fact, if porous or otherwise expanded samples are used, …
Date: June 23, 1976
Creator: Van Thiel, M.
System: The UNT Digital Library
X-ray streak and framing camera techniques (open access)

X-ray streak and framing camera techniques

This paper reviews recent developments and applications of ultrafast diagnostic techniques for x-ray measurements. These techniques, based on applications of image converter devices, are already capable of significantly important resolution capabilities. Techniques capable of time resolution in the sub-nanosecond regime are being considered. Mechanical cameras are excluded from considerations as are devices using phosphors or fluors as x-ray converters.
Date: December 23, 1975
Creator: Coleman, L. W. & Attwood, D. T.
System: The UNT Digital Library
Chemically separating transplutonium elements from rare earth fission products (open access)

Chemically separating transplutonium elements from rare earth fission products

The existing technology of lanthanide-actinide separations is discussed with emphasis on the difficulties to be expected if the currently practiced separation methods were to be applied to waste partitioning. All of the workable methods known are noted, and three out of the four have seen many applications for the last 20 to 25 years at our Laboratory and elsewhere. The fourth, developed at ORNL 16 to 17 years ago, has been applied to waste partitioning in Germany. Each of these methods depends upon complexing the actinides to a slightly greater extent than the lanthanides with either Cl/sup -/, SCN/sup -/, or aminocarboxylic acids. The separation of the complexed ions is accomplished with either liquid or solid ion-exchangers and, in principle, either can be used interchangeably.
Date: June 23, 1976
Creator: Hulet, E. K.
System: The UNT Digital Library
Concerning super-high gain pellets for laser fusion (open access)

Concerning super-high gain pellets for laser fusion

Recently Afanas'ev et al. claimed 1000 fold energy gains for a new class of pellets, which require only relatively very modest peak laser powers to implode and ignite. An extensive examination of these fuels was made using the LASNEX code. The results are described. (MOW)
Date: October 23, 1976
Creator: Wilson, B. & Wood, L.
System: The UNT Digital Library
Line-of-sight (LOS) pipe flow calculations (open access)

Line-of-sight (LOS) pipe flow calculations

None
Date: October 23, 1974
Creator: McCauley, E. W. & Sutton, S. B.
System: The UNT Digital Library
Downhole systems design (open access)

Downhole systems design

None
Date: October 23, 1974
Creator: McKay, J.P. & Depta, J.J.
System: The UNT Digital Library