Chaos generated pinch effect in toroidal confinement devices

G. Spizzo, R.B. White, S. Cappello

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Abstract

Particle transport in a toroidal plasma confinement device is shown to be nondiffusive when magnetic chaos is present. A phenomenological fit to density profiles gives a diffusion constant and also a pinch velocity directed up the density gradient. We show that the combination of diffusion and pinch is actually an expression of the nonlocal, subdiffusive nature of the transport. The effect is illustrated by numerical modelling of the magnetic structure and associated particle transport in conditions relevant for the reversed-field pinch experiment at the Consorzio RFX, Padova, Italy [G. Rostagni, Fusion Eng. Des. 25, 301 (1995)]. The relevance of this result is quite general, and could be applied also to other systems with chaos induced particle transport, such as electron transport in the tokamak. © 2007 American Institute of Physics.
Original languageEnglish
Article number102310
Pages (from-to)-
JournalPhysics of Plasmas
Volume14
Issue number10
DOIs
Publication statusPublished - 2007
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Spizzo, G., White, R. B., & Cappello, S. (2007). Chaos generated pinch effect in toroidal confinement devices. Physics of Plasmas, 14(10), -. [102310]. https://doi.org/10.1063/1.2776907