How turbulence fronts induce plasma spin-up

Y. Kosuga, S. I. Itoh, P. H. Diamond, K. Itoh

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


A calculation which describes the spin-up of toroidal plasmas by the radial propagation of turbulence fronts with broken parallel symmetry is presented. The associated flux of parallel momentum is calculated by using a two-scale direct-interaction approximation in the weak turbulence limit. We show that fluctuation momentum spreads faster than mean flow momentum. Specifically, the turbulent flux of wave momentum is stronger than the momentum pinch. The scattering of fluctuation momentum can induce edge-core coupling of toroidal flows, as observed in experiments.

Original languageEnglish
Article number031203
JournalPhysical Review E
Issue number3
Publication statusPublished - Mar 29 2017

All Science Journal Classification (ASJC) codes

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics


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