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Secondary instability in drift wave turbulence as a mechanism for zonal flow and avalanche formation

  • Author(s): Diamond, PH
  • Champeaux, S
  • Malkov, M
  • Das, A
  • Gruzinov, I
  • Rosenbluth, MN
  • Holland, C
  • Wecht, B
  • Smolyakov, AI
  • Hinton, FL
  • Lin, Z
  • Hahm, TS
  • et al.
Abstract

The article reports on recent developments in the theory of secondary instability in drift-ion temperature gradient turbulence. Specifically, the article explores secondary instability as a mechanism for zonal flow generation, transport barrier dynamics and avalanche formation. These in turn are related to the space-time statistics of the drift wave induced flux, the scaling of transport with collisionality and β, and the spatio-temporal evolution of transport barriers.

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