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    Suprathermal electron tails in a beam-plasma instability

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    Hollerbach_U_1987.pdf
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    Author
    Hollerbach, Uwe
    Chair
    Swift, W.
    Committee
    Stenbaek-Nielsen, H. C.
    Rees, M. H.
    Kan, J. R.
    Metadata
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    URI
    http://hdl.handle.net/11122/7365
    Abstract
    This study investigated the suprathermal electron tails produced in a beam-plasma instability, and their scaling with beam and background densities. A periodic one-dimensional electrostatic simulation was used to study the suprathermal tails. Electrons were treated as particles, and ions were treated as a fluid. The simulation showed that ion dynamics are required for the formation of the suprathermal tails, as expected from the theory of the oscillating two-stream instability. The energy of the suprathermal tails is directly proportional to the beam density, and does not depend strongly on the background density. There is a slight decrease in the energy of the suprathermal tails as the background density increases. A novel numerical effect was also found: a three-plasmon interaction caused by the modification of the Langmuir wave dispersion relation when high-order splines are used as particle shape factors.
    Description
    Thesis (M.S.) University of Alaska Fairbanks, 1987
    Date
    1987-09
    Type
    Thesis
    Collections
    Physics

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