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  • 1
    Electronic Resource
    Electronic Resource
    Compact, inexpensive target design for steady-state heat removal in high-heat-flux fusion applications (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 1526-1530 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A high-heat-flux target has been developed for intercepting multimegawatt, multisecond neutral beams at Oak Ridge National Laboratory (ORNL). Water-cooled copper swirl tubes are used for the heat transfer medium; these tubes exhibit an enhancement in burnout heat flux over conventional axial flow tubes. The target consists of 126 swirl tubes [each 0.95 cm in outside diameter (o.d.) with 0.16-cm-thick walls and ≈1 m long] arranged in a V shape and inclined with respect to the beam axis. In tests with the ORNL long-pulse ion source (13×43-cm grid), the target has handled up to 3-MW, 30-s beam pulses with no deleterious effects. The peak power density was estimated at ≈15 kW/cm2 normal to the beam axis (〉5 kW/cm2 maximum on tube surfaces). The water flow rate through the tubes was 0.33 l/s (5.2 gal/min) per tube (axial flow velocity=11.6 m/s) with a corresponding pressure drop of 1.14 MPa (165 psi). To date, the target has absorbed an estimated 25 000 full-power (≈3 MW) pulses for a cumulative time of ≈100 000 beam seconds without failure. Other potential applications for swirl tube technology in the fusion area include plasma limiters, divertor collector plates, rf launchers, and Faraday shields.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138148
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Repeating pneumatic hydrogen pellet injector for plasma fueling (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 1173-1178 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A repeating pneumatic pellet injector has been developed for plasma fueling applications. The repetitive device extends pneumatic injector operation to steady state. The active mechanism consists of an extruder and a gun assembly that are cooled by flowing liquid-helium refrigerant. The extruder provides a continuous supply of solid hydrogen to the gun assembly, where a reciprocating gun barrel forms and chambers cylindrical pellet from the extrusion; pellets are then accelerated with compressed hydrogen gas (pressures up to 125 bar) to velocities ≤1.9 km/s (1.6 km/s for deuterium pellets). The gun assembly design can accommodate different pellet sizes and barrel lengths. Steady-state rates of 2 s−1 have been obtained with 2.1- , 3.4- , and 4.0-mm-diameter pellets. The present apparatus operates at higher firing rates in short bursts; for example, a rate of 6 s−1 for 2 s with the larger pellets. These pellet parameters are in the range applicable for fueling large present-day fusion devices such as the Tokamak Fusion Test Reactor (TFTR). Experimental results are presented, including effects of propellant pressure and barrel length on gun performance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138025
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Studies on cultured and gill-attached Paramoeba sp. (Gymnamoebae: Paramoebidae) and the cytopathology of paramoebic gill disease in Atlantic salmon, Salmo salar L., from Tasmania (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish diseases 12 (1989), S. 0 
    Details
    ISSN: 1365-2761
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Abstract. The normally free-living amoeba Paramoeba sp. is associated with epithelial hyperplasia on the gills of Atlantic salmon, Salmo salar L., in Tasmania. Gill-attached paramoebae were significantly larger than cultured ones. Unlike cultured paramoebae, gill-attached ones had small electron-dense, cytoplasmic deposits and small surface projections at the host-parasite interface. Examination of sequential samples of Tasmanian salmon gills from spring to summer indicated that pathological changes in the gill filaments were associated only with the presence of Paramoeba; the parasite was also associated with necrosis of surface epithelial cells, and cytoplasmic processes passed into and between surface cells of hyperplastic gill epithelium. The evidence points to the paramoebae as primary opportunistic pathogens causing mechanical and possibly chemical damage. Based on size and ultrastructure, the Paramoeba sp. most closely resembles P. pemaquidensis Page.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2761.1989.tb00559.x
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  • 4
    Electronic Resource
    Electronic Resource
    Eight-shot pneumatic pellet injection system for the tokamak fusion test reactor (1987)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 58 (1987), S. 1195-1203 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An eight-shot pneumatic pellet injection system has been developed for plasma fueling of the tokamak fusion test reactor (TFTR). The active cryogenic mechanisms consist of a solid hydrogen extruder and a rotating pellet wheel that are cooled by flowing liquid-helium refrigerant. The extruder provides solid hydrogen for stepwise loading of eight holes located circumferentially around the pellet wheel. This design allows for three different pellet diameters: 3.0 mm (three pellets), 3.5 mm (three pellets), and 4.0 mm (two pellets) in the present configuration. Each of the eight pellets can be shot independently. Deuterium pellets are accelerated in 1.0-m-long gun barrels with compressed hydrogen gas (at pressures from 70 to 105 bar) to velocities in the range 1.0–1.5 km/s. The pellets are transported to the plasma in an injection line that incorporates two stages of guide tubes with intermediate vacuum pumping stations. A remote, stand-alone control and data-acquisition system is used for injector and vacuum system operation. The eight-shot injection system has been installed and operated on TFTR. The design features, operation, and performance characteristics of the system are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1139439
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  • 5
    Electronic Resource
    Electronic Resource
    Plasma exchange in the therapy of Behçet's disease (1989)
    Springer
    Graefe's archive for clinical and experimental ophthalmology 227 (1989), S. 360-363 
    Details
    ISSN: 1435-702X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Present therapies for Behçet's disease are unsatisfactory in many cases. We investigated the role of plasma exchange in four patients with severe Beheçet's retinitis who were unresponsive to standard medical therapies. Plasma exchange induced a rapid reduction of ocular inflammation with improved visual acuity in all cases. In patients with severe Behçet's retinitis, plasma exchange is able to interrupt the acute inflammatory activity, but relapses may occur.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02169413
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Formation of acetylcarnitine in muscle of horse during high intensity exercise (1987)
    Springer
    European journal of applied physiology 56 (1987), S. 639-642 
    Details
    ISSN: 1439-6327
    Keywords: Carnitine ; Acetylcarnitine ; Pyruvate metabolism ; Muscle ; Horse ; Exercise
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To study the changes in carnitine in muscle with sprint exercise, two Thoroughbred horses performed two treadmill exercise tests. Biopsies of the middle gluteal were taken before, after exercise and after 12 min recovery. Resting mean muscle total carnitine content was 29.5 mmol · kg−1 dry muscle (d. m.). Approximately 88% was free carnitine, 7% acetylcarnitine and acylcarnitine was estimated at 5%. Exercise did not affect total carnitine, but resulted in a marked fall in free carnitine and almost equivalent rise in acetylcarnitine. The results are consistent with a role for carnitine in the regulation of the acetyl-CoA/CoA ratio during sprint exercise in the Thoroughbred horse by buffering excess production of acetyl units.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00424803
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  • 7
    Electronic Resource
    Electronic Resource
    Whole-field optical examination of cylindrical shell deformation (1989)
    Springer
    Experimental mechanics 29 (1989), S. 16-22 
    Details
    ISSN: 1741-2765
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract In this paper an optical technique for the measurement of radial deformation in circular cylindrical shells is discussed. The technique is a modification and improvement on an earlier method, using a conical mirror of simple geometry to view a grating reflected from the inner surface of the shell. The new system allows more precise alignment of the components of the optical system with the shell. Fringes obtained by superposition as in the Ligtenberg moiré method, or deviations of lines from a regular pattern in a photographic image provide a measure of the slope changes on the surface of the shell. Theoretical relations are presented for three grid orientations, at least two of which have to be used in conjunction to determine the two components of slope. Illustrations for the use and accuracy of the technique are presented for two cases. In the first, deflections due to a tilt of the axis of the test shell are measured; in the second, deformations associated with a radial point load applied at the free end of a cylindrical shell with one end built in are determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02327776
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