Transport analysis of the effect of zonal flows on electron internal transport barriers in toroidal helical plasmas

S. Toda, K. Itoh, A. Fujisawa, S. I. Itoh, M. Yagi, A. Fukuyama, P. H. Diamond, K. Ida

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

The role of zonal flows in the formation of transport barrier in helical plasmas is analysed using the transport code. A set of one-dimensional transport equations is analysed, including the effect of zonal flows. The turbulent transport coefficient is shown to be suppressed when the plasma state takes the strong positive radial electric field. This bifurcation of the turbulent transport is newly caused by the change of the damping rate of zonal flows. It is theoretically demonstrated that the damping rate of zonal flows plays an important role in global confinement in toroidal plasmas.

Original languageEnglish
Article number024
Pages (from-to)914-919
Number of pages6
JournalNuclear Fusion
Volume47
Issue number8
DOIs
Publication statusPublished - Aug 1 2007

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

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