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Title: Microturbulence in DIII-D tokamak pedestal. IV. Electrostatic turbulent transport

Gyrokinetic simulations of electrostatic microturbulence in the edge plasmas of DIII-D shot 131997 find that the geodesic acoustic mode (GAM) is generated after nonlinear saturation both at the pedestal top and in the peak gradient region, and in turn, regulates the turbulence in both regions. Collisions significantly reduce the GAM amplitude and the associated GAM modulation of the turbulence in both regions. Collisions have little effects on the ion temperature gradient turbulent transport level at the pedestal top. Finally, on the other hand, collisional damping of the TEM significantly reduces the turbulent transport level in the peak gradient region.
Authors:
ORCiD logo [1] ; ORCiD logo [2] ;  [2] ;  [1] ;  [3]
  1. Peking Univ., Beijing (China). Fusion Simulation Center, State Key Lab. of Nuclear Physics and Technology, School of Physics
  2. Univ. of California, Irvine, CA (United States). Dept. of Physics and Astronomy
  3. Xiamen Univ., Xiamen (China). Dept. of Physics, and Institute of Theoretical Physics and Astrophysics
Publication Date:
Grant/Contract Number:
SC0010416; AC02-05CH11231; AC05-00OR22725
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 12; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of California, Irvine, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1465367
Alternate Identifier(s):
OSTI ID: 1336488

Liao, X., Lin, Z., Holod, I., Li, B., and Sun, G. Y.. Microturbulence in DIII-D tokamak pedestal. IV. Electrostatic turbulent transport. United States: N. p., Web. doi:10.1063/1.4972080.
Liao, X., Lin, Z., Holod, I., Li, B., & Sun, G. Y.. Microturbulence in DIII-D tokamak pedestal. IV. Electrostatic turbulent transport. United States. doi:10.1063/1.4972080.
Liao, X., Lin, Z., Holod, I., Li, B., and Sun, G. Y.. 2016. "Microturbulence in DIII-D tokamak pedestal. IV. Electrostatic turbulent transport". United States. doi:10.1063/1.4972080. https://www.osti.gov/servlets/purl/1465367.
@article{osti_1465367,
title = {Microturbulence in DIII-D tokamak pedestal. IV. Electrostatic turbulent transport},
author = {Liao, X. and Lin, Z. and Holod, I. and Li, B. and Sun, G. Y.},
abstractNote = {Gyrokinetic simulations of electrostatic microturbulence in the edge plasmas of DIII-D shot 131997 find that the geodesic acoustic mode (GAM) is generated after nonlinear saturation both at the pedestal top and in the peak gradient region, and in turn, regulates the turbulence in both regions. Collisions significantly reduce the GAM amplitude and the associated GAM modulation of the turbulence in both regions. Collisions have little effects on the ion temperature gradient turbulent transport level at the pedestal top. Finally, on the other hand, collisional damping of the TEM significantly reduces the turbulent transport level in the peak gradient region.},
doi = {10.1063/1.4972080},
journal = {Physics of Plasmas},
number = 12,
volume = 23,
place = {United States},
year = {2016},
month = {12}
}