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  • 1995-1999  (6)
  • 1990-1994  (4)
  • 1930-1934  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Another paradox involving the second law of thermodynamics (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 104-110 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Recently a paradox has been posed that appears to challenge the second law of thermodynamics in a plasma blackbody environment [D. P. Sheehan, Phys. Plasmas 2, 1893 (1995)]. In this paper another, related paradox is posed in an unmagnetized Q plasma. Laboratory experiments simulating some necessary conditions for the paradoxical system corroborate theoretical predictions and fail to resolve the paradox in favor of the second law. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871834
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A paradox involving the second law of thermodynamics (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 1893-1898 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A simple paradox is posed that appears to challenge the second law of thermodynamics in a blackbody plasma environment. Laboratory experiments approximating salient aspects of this system fail to resolve the paradox. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871276
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Minimum requirement for second law violation: A paradox revisited (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 2469-2471 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A paradox has been posed that challenges the second law of thermodynamics in a plasma blackbody environment [D. P. Sheehan, Phys. Plasmas 2, 1893 (1995)]. Laboratory experiments testing critical aspects of the paradox have supported theoretical predictions and have failed to resolve the paradox in favor of the second law. In this article, the paradox is sharpened and expanded in scope by identifying the crux of the paradox and the general requirements for second law violation. It is found that for an electrically conducting probe immersed in a blackbody plasma and connected to ground through a load, the general requirement for second law violation is Vf≠0, where Vf is the plasma floating potential. This requirement can be met by many natural and manmade plasmas. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872924
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Device for dispersal of micrometer- and submicrometer-sized particles in vacuum (1990)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 3871-3875 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple, versatile device for dispersing micrometer- and submicrometer-sized particles in vacuum is described. The source allows control of particle size (0.5 μm≤l≤200 μm) and particle flux density up to roughly 107 cm−2 s−1. Several types of microparticles were successfully dispersed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141515
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Ion acceleration and anomalous transport in the near wake of a plasma limiter (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 4 (1997), S. 3177-3186 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Ion acceleration and anomalous transport were studied experimentally in the near wake region of an electrically floating disk limiter immersed in two different types of collisionless, supersonically flowing, magnetized plasmas: the first initially quiescent, the second initially turbulent. Ion densities and velocity distributions were obtained using a nonperturbing laser induced fluorescence diagnostic. Large-amplitude, low-frequency turbulence was observed at the obstacle edge and in the wake. Rapid ion and electron configuration space transport and ion velocity space transport were observed. Configuration space and velocity space transport were similar for both quiescent and turbulent plasma-obstacle systems, suggesting that plasma-obstacle effects outweigh the effects of initial plasma turbulence levels. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872457
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Response to "Comment on ‘A paradox involving the second law of thermodynamics' '' [Phys. Plasmas 2, 1893 (1995)] (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 706-706 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871794
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Diagnosis of electron density in magnetized plasmas using lower hybrid waves (1998)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 69 (1998), S. 1699-1701 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple electron density diagnostic for low-temperature, magnetized plasmas is described which relies on the propagation angle of lower hybrid waves. Experiments are discussed in which the diagnostic is used to determine residual electron densities in negative ion plasmas. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1148829
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Simple overdense rf plasma source (1990)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 61 (1990), S. 3460-3463 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A simple, gas-fed, radio-frequency-driven plasma source is described. By use of lower hybrid waves, noble gas plasmas were produced with electron densities up to 1012 cm−3 over a range of magnetic fields from 400 G to 1.5 kG and rf frequencies from 2–220 MHz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1141603
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Adjustable levels of strong turbulence in a positive/negative ion plasma (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 1523-1528 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Positive/negative ion plasmas, composed of Ba+, SF6−, and residual electrons, were observed to display characteristics of strong turbulence. Experiments on the UCI Q machine linked the presence of negative ions (and the depletion of electrons) with large density fluctuations (δn/n(approximately-equal-to)1), large-amplitude, low-frequency electrostatic noise (f≤20 kHz), and rapid transport of ions across magnetic field lines (D⊥(approximately-equal-to)104 cm2/sec). Ion velocity distributions were heated parallel to and cooled perpendicular to the confining magnetic field. The partial pressure of gaseous SF6 was shown to serve as a regulator of plasma turbulence. Turbulence levels could be smoothly varied from quiescent states (δn/n(approximately-equal-to)0.01) to strongly turbulent states (δn/n(approximately-equal-to)1).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860892
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Veränderungen an den Endösen im Rückenmark des Affen nach Hinterwurzeldurchschneidung (1933)
    Springer
    Anatomy and embryology 101 (1933), S. 553-565 
    Details
    ISSN: 1432-0568
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02118766
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    Paper (German National Licenses)
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