Instabilities Associated with Fast Particles in Toroidal Confinement Systems

  • Jan Weiland
Chapter
First Online:
Part of the Springer Series on Atomic, Optical, and Plasma Physics book series (SSAOPP, volume 71)

Abstract

As mentioned in Sect. 6.93, toroidal drift wave transport gives an unfavourable scaling of the energy confinement time with heating power, roughly in agreement with the empirical scaling law (1.8). It is worth observing that this scaling is obtained with a reactive fluid model where only magnetic drift resonances of a fluid type were included. The unfavourable scaling with heating power is due partly to the scaling of transport coefficients with temperature as T−3/2 and partly to the threshold behaviour, i.e. (ηi−ηith)1/2. These are effects of a pure (ideal) heating on the bulk plasma transport and are thus independent of the heating method. We note the close analogy with Rayleigh Benard convection in usual fluids where the heating itself leads to convective transport.

Keywords

Energetic Particle Trap Particle Fast Particle Precession Frequency Bulk Plasma 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© Springer Science+Business Media New York 2012

Authors and Affiliations

  • Jan Weiland
    • 1
  1. 1.Chalmers University of Technology and EURATOM VR AssociationGothenburgSweden

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