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  • 1990-1994  (2)
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Material
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Year
  • 1
    Electronic Resource
    Electronic Resource
    The electrostatic wake of a superthermal test electron in a magnetized plasma (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 2764-2768 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The electrostatic potential is determined for a test electron with v(parallel) (very-much-greater-than) vTe in a uniform magnetized plasma (ωce (very-much-greater-than) ωpe). In the frame of the test electron, part of the spatially oscillatory potential has spherical symmetry over the hemisphere to the rear of the electron and is zero ahead of the electron. A second part of different character, which makes the potential continuous at the plane containing the electron, is oscillatory in the radial direction but decreases almost monotonically in the axial direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860717
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The rapid inward diffusion of cold ions in tokamaks and their effect on ion transport (1990)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 2 (1990), S. 1435-1440 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The observed increase with density of the density asymmetry caused by the centrifugal force of toroidal motion in the PDX tokamak [Plasma Physics and Controlled Nuclear Fusion Research (IAEA, Vienna, 1981), Vol. 1, p. 665], which is contrary to conventional theory, is explained by the presence of an excess of low-energy ions with 10%–15% concentration. The prime source being recycling, it is shown that low-energy ions undergo rapid inward diffusion (too rapid to thermalize with the outward diffusing energetic ions) because of the combined effects of large νPA, electrostatic diffusion, and negative Er and ∂Ti/∂r. The presence of the low-energy ions alters dramatically the predictions of neoclassical theory and many hydrogen and impurity ion transport phenomena now have simple explanations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859465
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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