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Title: Gyrokinetic understanding of the edge pedestal transport driven by resonant magnetic perturbations in a realistic divertor geometry

Abstract

Self-consistent simulations of neoclassical and electrostatic turbulent transport in a DIII-D H-mode edge plasma under resonant magnetic perturbations (RMPs) have been performed using the global total-f gyrokinetic particle-in-cell code XGC, in order to study density-pump out and electron heat confinement.The RMP field is imported from the extended magneto-hydrodynamics (MHD) code M3D-C1, taking into account the linear two-fluid plasma response.With both neoclassical and turbulence physics considered together, the XGC simulation reproduces two key features of experimentally observed edge transport under RMPs: increased radial particle transport in the pedestal region that is sufficient to account for the experimental pump-out rate, and suppression of the electron heat flux in the steepest part of the edge pedestal.In the simulation, the density fluctuation amplitude of modes moving in the electron diamagnetic direction increases due to interaction with RMPs in the pedestal shoulder and outward, while the electron temperature fluctuation amplitude decreases.

Authors:
; ;
Publication Date:
DOE Contract Number:  
AC02-09CH11466; FC02-04ER54698; AC02-06CH11357; AC02-05CH11231
Product Type:
Dataset
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
Keywords:
XGC; DIII-D; RMP; turbulence; transport
OSTI Identifier:
1661170
DOI:
https://doi.org/10.11578/1661170

Citation Formats

Hager, R, Chang, C S, Ferraro, N M, and Nazikian R. Gyrokinetic understanding of the edge pedestal transport driven by resonant magnetic perturbations in a realistic divertor geometry. United States: N. p., 2020. Web. doi:10.11578/1661170.
Hager, R, Chang, C S, Ferraro, N M, & Nazikian R. Gyrokinetic understanding of the edge pedestal transport driven by resonant magnetic perturbations in a realistic divertor geometry. United States. doi:https://doi.org/10.11578/1661170
Hager, R, Chang, C S, Ferraro, N M, and Nazikian R. 2020. "Gyrokinetic understanding of the edge pedestal transport driven by resonant magnetic perturbations in a realistic divertor geometry". United States. doi:https://doi.org/10.11578/1661170. https://www.osti.gov/servlets/purl/1661170. Pub date:Wed Jun 10 00:00:00 EDT 2020
@article{osti_1661170,
title = {Gyrokinetic understanding of the edge pedestal transport driven by resonant magnetic perturbations in a realistic divertor geometry},
author = {Hager, R and Chang, C S and Ferraro, N M and Nazikian R.},
abstractNote = {Self-consistent simulations of neoclassical and electrostatic turbulent transport in a DIII-D H-mode edge plasma under resonant magnetic perturbations (RMPs) have been performed using the global total-f gyrokinetic particle-in-cell code XGC, in order to study density-pump out and electron heat confinement.The RMP field is imported from the extended magneto-hydrodynamics (MHD) code M3D-C1, taking into account the linear two-fluid plasma response.With both neoclassical and turbulence physics considered together, the XGC simulation reproduces two key features of experimentally observed edge transport under RMPs: increased radial particle transport in the pedestal region that is sufficient to account for the experimental pump-out rate, and suppression of the electron heat flux in the steepest part of the edge pedestal.In the simulation, the density fluctuation amplitude of modes moving in the electron diamagnetic direction increases due to interaction with RMPs in the pedestal shoulder and outward, while the electron temperature fluctuation amplitude decreases.},
doi = {10.11578/1661170},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2020},
month = {6}
}