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Title: Neutral recycling effects on ITG turbulence

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.
Authors:
ORCiD logo [1] ;  [2] ;  [1] ;  [1] ;  [1]
  1. Princeton Univ., Princeton, NJ (United States). Princeton Plasma Physics Lab.
  2. Intel Corp., Santa Clara, CA (United States)
Publication Date:
Grant/Contract Number:
AC02-05CH11231; AC02-09CH11466; AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 57; Journal Issue: 8; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Research Org:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; gyrokinetic simulation; plasma turbulence; neutral recycling; tokamak; FEC 2016
OSTI Identifier:
1373269