Neutral recycling effects on ITG turbulence

Stotler, D. P.; Lang, J.; Chang, C. S.; Churchill, R. M.; Ku, S.

doi:10.1088/1741-4326/aa7807

Title: Neutral recycling effects on ITG turbulence

Journal Article · Tue Jul 04 04:00:00 UTC 2017 · Nuclear Fusion

DOI: https://doi.org/10.1088/1741-4326/aa7807 · OSTI ID:1373269

^[1]; Lang, J. ^[2]; Chang, C. S. ^[1]; Churchill, R. M. ^[1]; Ku, S. ^[1]

Princeton Univ., Princeton, NJ (United States). Princeton Plasma Physics Lab.
Intel Corp., Santa Clara, CA (United States)

Here, 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. An adiabatic electron model has been used; hence, the impacts of neutral particles and turbulence on the density gradient are not considered, nor are electromagnetic turbulence effects. 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 $$E\times B$$ shearing rate.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: DOE Office of Science; USDOE

Grant/Contract Number:: AC02-05CH11231; AC02-09CH11466; AC05-00OR22725

OSTI ID:: 1373269

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 8 Vol. 57; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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