To achieve the goal of developing adequate shielded metal arc (SMA) welding consumables for advanced high strength steels, characterization of the complex relationship between the core rod and the flux coating is required. An adequate core rod/flux coatin...
National Technical Information Service (NTIS)
A method and apparatus for compressing magnetic flux to achieve high levitation pressures. Magnetic flux produced by a magnetic flux source travels through a gap between two high temperature superconducting material structures. The gap has a varying cross-sectional area to ...
Energy Citations Database
A method and apparatus are disclosed for compressing magnetic flux to achieve high levitation pressures. Magnetic flux produced by a magnetic flux source travels through a gap between two high temperature superconducting material structures. The gap has a varying ...
DOEpatents
The evaporator relied on droplet impingement cooling to achieve high heat flux and low thermal resistance. ... loop heat pipes or capillary pumped loops. V ...
NASA Website
We show that simple laser configurations can give rise to "optical flux lattices," in which optically dressed atoms experience a periodic effective magnetic flux with high mean density. These potentials lead to narrow energy bands with nonzero Chern numbers. Optical flux lattices will greatly facilitate the ...
PubMed
A possibility of achieving steady state high beta plasma confinement in toroidal geometry is considered in detail by closing off the ends of tandem mirrors entirely by flux bridges, where beta is the ratio of plasma pressure to the magnetic pressure. The ...
Laboratory evaluations have shown that polybenzimidazole (PBI) hollow fiber membranes possess outstanding desalination properties. Water flux as high as 10 gfd and salt rejections as high as 99% have been achieved. Structure-desalination performance corre...
Surface Fluxes: Challenges at High Latitudes; Boulder, Colorado, 17-19 March 2010; Tracking high-latitude climate change requires an understanding of the fluxes between the atmosphere, ocean, and ice. However, efforts to determine surface fluxes at high latitudes face ...
NASA Astrophysics Data System (ADS)
We investigated simultaneous quench characteristics of high-TC superconducting (HTSC) elements in the flux-lock type superconducting fault current limiters (SFCLs) connected in series through the magnetic flux-linkage. To apply the flux-lock type SFCL into power system, its current and voltage ratings are required ...
The goal of the Pulsed High Density (PHD) experiment is to reach break-even conditions through the Magneto-Kinetic (MK) compression of the Field Reversed Configuration (FRC). The distributed nature of the MK process provides for highly efficient coupling of bank energy into FRC thermal energy. The FRC is self-compressed to a hot, high ...
A comparison of possible types of reactors for the production of transplutonium elements and other isotopes indicates that a flux-trap reactor consisting of a beryllium-reflected, light-water-cooled annular fuel region surrounding a light-water island provides the required thermal neutron fluxes (3 x 10/sup 15/) at minimum cost. The preliminary ...
May 1, 2011 ... The liquid ammonia then flows to an evaporator, where it is mixed with ... to commercialize the work he had done under the NASA contracts. ... Breadboard and test station of Mikros' High-Heat Flux Evaporator for the ... The evaporator relied on droplet impingement cooling to achieve high heat ...
The Beryllium reflector of the High Flux Isotope Reactor is currently redesigned for upgrading the capability of the reactor. The original design criteria are adopted in the redesign analysis. Both nuclear heating and thermal stress calculations are revised. The results show that more margin of safety have been achieved and the updated ...
DOE Information Bridge
A method and system for producing a film (preferably a thin film with highly uniform or highly accurate custom graded thickness) on a flat or graded substrate (such as concave or convex optics), by sweeping the substrate across a vapor deposition source operated with time-varying flux distribution. In preferred embodiments, the source ...
Magnetic bearings have demonstrated the capability for achieving positioning accuracies at the nanometer level in precision motion control stages. This makes possible the positioning of a wafer in six degrees of freedom with the precision necessary for ph...
Flux density and very long baseline interferometric measurements of 3C120 at several wavelengths and times have been analyzed in terms of a model proposed by Ozernoy and Sazonov (1969). Highly satisfactory agreement is achieved if explosive outbursts, eac...
Progress achieved on the study of passive laser Qswitching techniques is summarized. Laser Q-switching techniques afforded by electro-optical or rotating prism devices are discussed. Actually, because of the large photon flux available in a highly inverte...
The HFIR facility was originally designed to store approximately 25 spent cores, sufficient to allow for operational contingencies and for cooling prior to off-site shipment for reprocessing. The original capacity has now been increased to 60 positions, o...
A slow cycling flux pump was constructed with digital logic driving a high power operational amplifier for control. Hall sensors allow closed loop control of the secondary currents, allowing switching of the heater driven power cryotrons at the optimum time. Operating efficiency of 87 percent was achieved. (auth)
Measurements have been performed on superconducting flux qubits using a Josephson bifurcation amplifier (JBA). The qubit states are identified with the two stable dynamic states of a strongly driven non-linear oscillator that contains a SQUID sensor. Readout with high fidelity is achieved. Correlations in repeated measurements ...
Traditional integrating spheres, which use a single detector to measure luminous flux, have a number of drawbacks associated with the sources of error caused by baffling, nonideal topology, and variations in surface reflectance. In this article we address the potential drawbacks of many traditional integrating spheres and present a new instrument which ...
There is a trade-off between how much effort should go into the tuning of insertion devices to reduce their rms phase errors and the actual benefits achieved in spectral quality when the real APS beam emittance and beam energy spread are taken into accoun...
Steady-state handling of divertor heat flux is a critical issue for both ITER and spherical torus-based devices with compact high power density divertors. Significant reduction of heat flux to the divertor plate has been achieved simultaneously with favorable core and pedestal confinement and stability properties ...
Most neutron radiography facilities are based on the principle of a pinhole camera. With this setup the best spatial resolution and the maximal neutron flux at the specimen cannot be achieved simultaneously. A high flux is desirable in order to obtain a high signal-to-noise ratio within a short ...
The objectives of the second year of the program are to define a material composition and composite architecture that enable the oxygen flux and stability targets to be obtained in high-pressure flux tests. Composite technology will be developed to enable the production of high-quality, defect free membranes of a ...
An interferometric spectrometer is proposed for low resource LWIR hyperspectral imaging. Scaling from an uncooled LWIR HSI system, we find that signal to noise ratios of 1000 or higher can be achieved with cooled detectors and uncooled optics. Signal flux is high enough to collect high quality data at very ...
A method and system for determining a source flux modulation recipe for achieving a selected thickness profile of a film to be deposited (e.g., with highly uniform or highly accurate custom graded thickness) over a flat or curved substrate (such as concave or convex optics) by exposing the substrate to a vapor ...
This thesis showed that it is possible to achieve well ordered growth at low temperatures when chaing fluxes during the course of the deposition. It was also demonstrated that nucleation theory fails to predict or explain at least part of the results, in particular when deposition takes place at an initially low rate, with presumably a relatively low ...
Magnetic field fluctuation-induced particle transport has been directly measured in the high-temperature core of the MST reversed field pinch plasma. Measurement of radial particle transport is achieved by combining various interferometry techniques, including Faraday rotation, conventional interferometry, and differential interferometry. It is observed ...
Mass fluctuations that arise from Mach effects when objects that can store internal energy are accelerated and their application to the production of propellantless thrusts are briefly reviewed. Follow-on experimental work to that reported at STAIF 2004 and 2005 is described. In particular, thrusts in ``flux capacitors'' made with high voltage disk ...
A goal of whole body counting (WBC) is the estimation of the total body burden of radionuclides disregarding the actual position within the body. To achieve the goal, the detectors need to be placed in regions where the photon flux is as independent as possible from the distribution of the source. At the same time, the detectors need ...
Verbatim transcriptions of nine seminars on ultra high flux research reactors are revised and collected here. The seminars included: production of transuranic elements, isotope production using high fluxes, high fluxes for neutron diffraction experiments and ...
Extrapolating from the Pulsed Spheromak reactor and the LINUS concept, we consider ignition achieved by injecting a conducting liquid into the flux conserver to compress a low temperature spheromak created by gun injection and ohmic heating. The required energy to achieve ignition and high gain by compression is ...
A 100 MWt reactor design has been conceived to support flux level of the order of 1015 n/cm2/s in selected flux trap zones. The physics design considers high enriched metallic alloy fuel in the form of annular plates placed in a D2O moderator tank in a hexagonal lattice arrangement. By choosing a tight lattice pitch in the central ...
The need for thermal and fast neutron fluxes in the range of 1 to 5 x l0/ sup 15/ neutrons/cm/sup 2/(sec) for the production of heavy elements such as Cf/ sup 252/ and other special isotopes and for improving the quality of beam experiments, reactor materiais testing work, and solid state research has led to plans for the construction of three ultra ...
The hardening of instruments to survive NIF target emission environments presents a significant challenge. Neutron flux is predicted to be as much as six orders of magnitude greater than the highest achieved neutron flux on NOVA. Not withstanding the high prompt radiation fields, the specifications for the ...
The High Flux Engineering Test Reactor (HFETR) designed and built by China own efforts reached to its initial criticality on Dec. 27, 1979, and then achieved high power operation on Dec. 16, 1980. Until Nov. 11, 1986, the reactor had been operated for thirteen cycles. The paper presents briefly main feature of ...
The highest performing spheromaks in the laboratory are formed by electrostatic helicity injection. Discharges with up to 1 MA plasma current and core electron temperature as high as 500 eV have been recently obtained. For such a scheme to scale-up to a reactor, however, a much higher current multiplication factor (plasma current over injector current) must be ...
Large actinide transmutation rates can be obtained in high thermal flux blankets surrounding a spallation neutron source. The low transmutation efficiency, i.e., actinide fissions per actinide neutron absorption, usually attributed to thermal actinide transmutation systems can be overcome in a high-flux regimes where short-lived ...
The combination of impinging jets and diamond substrates may provide an effective solution to a class of extremely high heat flux problems in which very localized heat loads must be removed. Some potential applications include the cooling of high-heat-load components in synchrotron x-ray, fusion, and semiconductor laser systems. ...
Nanofiltration (NF) was investigated for the removal of glyphosate in the neutralization liquor produced by the glycine-dimethylphosphit process. The Desal-5 DK membrane was chosen as the most suitable membrane for the NF process when compared to the DL and NTR7450 membranes according to retention of glyphosate and the permeate flux. The effects of applied pressure, ...
... For toroidal (inductive) electric fields in ... magnetic flux compression generators,� Proc. ... flux compression generator code, CAGEN, implementing the ...
DTIC Science & Technology
... on specimens containing flux/cleaner ... COMPOUNDS, *RESIDUES, *FLUXES(FUSION ... CHLORINATED HYDROCARBONS, METALLURGY, HIGH ...
... FLUX(RATE), *SUPERCONDUCTORS, *DISPERSIONS, DENSITY, COHERENCE, HIGH DENSITY, FLUX DENSITY, IRRADIATION, POWER ...
... energy flux to a characteristic kinetic energy flux. ... BLAST, PROPAGATION, HIGH ALTITUDE, HEAT TRANSFER, HEAT FLUX, MATHEMATICAL ...
Pohang Accelerator Laboratory (PAL) is developing a 14 cm period wiggler (MPW14) for high flux material science(HFMS) beamline. The MPW14 is a hybrid type device achieving higher peak flux density. PLS MPW14 features period of 14cm, minimum gap of 14mm, 24 full field poles, maximum flux density ...
The High Flux Isotope Reactor Introduction Since it began full-power operations in 1966, the High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory (ORNL) has been...
Science.gov Websites
... For High Heat Flux Thermal Control ... to) - Title and Subtitle Diamond Microchannel Heat Sink Designs For High Heat Flux Thermal Control ...
... HIGH-FLUX HEAT TRANSFER IN RADIATIVELY HEATED COMPACT EXCHANGERS ... HIGH-FLUX HEAT TRANSFER IN RADIATIVELY HEATED ...
At the present time, 105 research and test reactors are in operation being built, or planned in the United States, compared to 22 in operation by the end of 1955. The most popular types are the low power training reactors and the high flux pool or tank type. This is due to the relatively low cost of the training reactors (~ 0,000) and the ...
Beta particle surface fluxes for tritium, Ni-63, Pm-147, and Sr-90 sources were calculated in this work. High current density was experimentally achieved from Pm-147 oxide in silica-titana glass. A 96 GBq (2.6 Ci) Pm-147 4pi-source with flux efficiency greater than 50% was used for constructing a direct charge ...
We demonstrate that layered morphology of tetracene films on silicon oxide can be achieved at room temperature via vacuum evaporation. Island size distribution analysis shows that tetracene nucleation in a high-flux growth regime is diffusion-mediated with a critical island size i =3, similar to that in pentacene growth. A pronounced post-growth relaxation ...
This paper discusses the fabrication issues involved with a high gain helical flux compression generator. The generator is 20 cm in diameter, 76 cm long, contains 4500 gm of explosives, and its desired output is 2 million amperes into a 200-nH load. Our goal is to attain better than 1000 X current multiplication. To achieve this goal ...
of heat flux at the same surface location is presented. This ... for measuring local transient surface heat flux. The heat flux ...
GaN exists in both wurtzite and zinc-blende phases and the growths of the two on its (0001) or (111) surfaces are achieved by choosing proper deposition conditions of molecular-beam epitaxy (MBE). At low substrate temperatures but high gallium fluxes, metastable zinc-blende GaN films are obtained, whereas at high ...
The primary objective of this project was to evaluate carbon exchange dynamics across a region of North America between the Great Plains and the East Coast. This region contains about 40 active carbon cycle research (AmeriFlux) sites in a variety of climatic and landuse settings, from upland forest to urban development. The core research involved a scaling strategy that uses ...
The interaction of two different ordering schemes -- charge density waves (CDWs) and superconductivity -- is studied in high-quality samples of NbSe2, particularly in the motion of magnetic flux quanta. More specifically, the study is on the effect of ``switching off'' the CDW phase -- effected by doping with Ta -- on the magnetic-field H dependence of: ...
Bottom-up scaling of tower based ecosystem fluxes to a large region involves several steps. In essence, the bottom-up approach to scaling constitutes a defensible strategy to fill the space between a set of in-situ observational nodes (i.e., the flux towers) with an estimate of the exchange that is matched to measured values at the nodes. To ensure that ...
In this paper, a new flux-controllable stator permanent magnet (PM) brushless motor drive is proposed which is particularly attractive for electric vehicles. The key of the proposed motor is to incorporate both PM materials and dc field windings in the stator, hence offering a compact arrangement of hybrid-field excitations, while the rotor is simply composed of salient poles ...
A new approach to high flux research reactors is described, the VHFR (Very High Flux Reactor). The VHFR fuel region(s) are packed beds of HTGR-type fuel particles through which coolant (e.g., D/sub 2/O) flows directly. The small particle diameter (typically on the order of 500 microns) results in very large surface ...
A vacuum-ultraviolet bending-magnet beamline for circular dichroism (CD) experiments has been designed. To maximize the photon flux and minimize the focused beam size, a cylindrical mirror and a cylindrical grating with independent optical functions are utilized. The beamline can collect a 30 mrad horizontal by 7 mrad vertical solid angle of synchrotron radiation. By using a ...
Significant advances in system-level modeling of cellular behavior can be achieved based on constraints derived from genomic information and on optimality hypotheses. For steady-state models of metabolic networks, mass conservation and reaction stoichiometry impose linear constraints on metabolic fluxes. Different objectives, such as maximization of growth ...
The nature of the dry develop process demands controllable ion energies for good etch selectivity, a large highly directional ion flux for good anisotropy, and a clean etch. As a part of the plasma characterization, the plasma density, the resist etch rate, the ion energy and the ion energy flux have been determined as a function of ...
A readout system for a high-rate muon Cathode Strip Chamber (CSC) is described. The system, planned for use in the forward region of the ATLAS muon spectrometer, uses two custom CMOS integrated circuits to achieve good position resolution at a flux of up to 2,500 tracks/cm{sup 2}/s.
In some experiments, intense electron fluxes were made to encounter high proton concentrations to achieve p + e fusions. Anomalies were observed: The electron energies were often below the threshold energy, and the cross-section results were unexpectedly high. A twofold mechanism consisting of hydrogen squeezed ...
Two heliostats, the Veda Industrial Heliostat (VIH) and the Repowering Heliostat were investigated in conjunction with the UHA. The UHA was found to be a viable candidate for solar thermal central receiver applications. The UHA-VIH combination was shown to provide very high flux densities and to be suitable for high temperature ...
