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Showing 1 to 3 of 3 for “"vortex diffusivity"”.

  1. Measurements of vortex diffusivity in 2D superfluid 4He

    Volz, Stephen Michael2011

    Submitted by Carolyn Mead (cmead2@illinois.edu) on 2011-06-02T16:33:20Z No. of bitstreams: 1 1987_Volz.pdf: 1786717 bytes, checksum: 1cc26e52df659ca7f06b9deb99151dd8 (MD5)

    uiuc Repository record

  2. Measurements of Vortex Diffusivity in 2d Superfluid Helium-4

    Volz, Stephen MichaelUniversity of Illinois at Urbana-Champaign2015

    … for the first time the characteristics of vortex induced superfluid flow dissipation at temperatures well below the Kosterlitz-Thouless superfluid transition temperature. Our studies are with films of coverage .25 < (sigma)(,s) < 1.9 superfluid atomic layers and with .55 < T(,KT) < …

    uiuc Repository record

  3. Model for the onset of nonlinear flow dissipation in 2D superfluid helium films

    Gillis, Keith Alan2011

    … are temperature dependent. The free vortex contribution is most important at the higher temperatures whereas the bound pair contribution is dominant at low temperatures. The model is fitted to experimental measurements with two weakly coupled adjustable paramters: the vortex …

    uiuc Repository record