Browsing by Author "Watterson, PA"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    Analysis of magnetic field data from Rotamak VI
    (Australian Nuclear Science and Technology Organisation, 1987-11) Watterson, PA
    Magnetic field data from an array of points within the Rotamak VI at the Flinders University of South Australia are analysed using a new algorithm to integrate the experimentally measured gradient of a function of two variables. Evaluation of the poloidal flux function using both components of the magnetic field reveals two closed flux regions one inside and one outside the radius of the rotating magnetic field (RMF) coils. The smoothed toroidal current density features a small region of reversed current outside the RMF coils. Plasma pressure is evaluated assuming pressure balance.
  • Thumbnail Image
    Item
    Rotamak equilibrium calculations using the PEST code
    (Australian Nuclear Science and Technology Organisation, 1987-12) Watterson, PA
    This report describes the use of the equilibrium part of the Princeton equilibrium and stability code PEST to model rotamak equilibria with an applied toroidal magnetic field. An overview of the code is provided together with a list of required input data. The simulation of a range of equilibria measured in the ANSTO rotamak shows that the rotamak approximately satisfies magnetohydrodynamic equilibrium. Of particular interest is the presence of large diamagnetic poloidal current about the magnetic axis which produces a peak in the plasma pressure on the magnetic axis. For a low toroidal field however poloidal current of opposite direction is simultaneously driven on flux surfaces distant from the magnetic axis producing paramagnetism.