Neutral recycling effects on ITG turbulence

Stotler, D. P. ; Lang, J.; Chang, C. S. ; Churchill, R. M. ; Ku, S. -H.
Issue date: 2017
Creative Commons Attribution 4.0 International (CC BY)
Cite as:
Stotler, D. P., Lang, J., Chang, C. S., Churchill, R. M., & Ku, S. -H. (2017). Neutral recycling effects on ITG turbulence [Data set]. Princeton Plasma Physics Laboratory, Princeton University.
  author      = {Stotler, D. P. and
                Lang, J. and
                Chang, C. S. and
                Churchill, R. M. and
                Ku, S. -H.},
  title       = {{Neutral recycling effects on ITG turbule
  publisher   = {{Princeton Plasma Physics Laboratory, Pri
                nceton University}},
  year        = 2017,
  url         = {}

The effects of recycled neutral atoms on tokamak ion temperature gradient (ITG) driven turbulence have been investigated in a steep edge pedestal, magnetic separatrix configuration, with the full-f edge gryokinetic code XGC1. Ion temperature gradient turbulence is the most fundamental and robust edge plasma instability, having a long radial correlation length and an ability to impact other forms of pedestal turbulence. The neutral atoms enhance the ITG turbulence, first, by increasing the ion temperature gradient in the pedestal via the cooling effects of charge exchange and, second, by a relative reduction in the ExB shearing rate.

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