Intrinsic momentum generation by a combined neoclassical and turbulence mechanism in diverted DIII-D plasma edge

Seo, Janghoon; Chang, C. S.; Ku, S.; Kwon, J. M.; Choe, W.; Müller, Stefan H.

doi:10.1063/1.4894242

Title: Intrinsic momentum generation by a combined neoclassical and turbulence mechanism in diverted DIII-D plasma edge

Journal Article · Tue Sep 02 00:00:00 EDT 2014 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4894242· OSTI ID:1565183

Seo, Janghoon ^[1]; Chang, C. S. ^[2]; Ku, S. ^[2]; Kwon, J. M. ^[3]; Choe, W. ^[1]; Müller, Stefan H. ^[4]

Korea Advanced Inst. of Science and Technology, Daejeon (South Korea)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
National Fusion Research Inst., Daejeon (South Korea)
Max Planck Inst. for Plasma Physics, Garching (Germany); Univ. of California San Diego, La Jolla, CA (United States). Center for Energy Research

Fluid Reynolds stress from turbulence has usually been considered to be responsible for the anomalous toroidal momentum transport in tokamak plasma. Experiment by Müller et al. [Phys. Rev. Lett. 106, 115001 (2011)], however, reported that neither the observed edge rotation profile nor the inward momentum transport phenomenon at the edge region of an H-mode plasma could be explained by the fluid Reynolds stress measured with reciprocating Langmuir-probe. The full-function gyrokinetic code XGC1 is used to explain, for the first time, Müller et al.'s experimental observations. It is discovered that, unlike in the plasma core, the fluid Reynolds stress from turbulence is not sufficient for momentum transport physics in plasma edge. Finally, the “turbulent neoclassical” physics arising from the interaction between kinetic neoclassical orbit dynamics and plasma turbulence is key in the tokamak edge region across the plasma pedestal into core.

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

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-09CH11466; FC02-04ER54698

OSTI ID:: 1565183

Journal Information:: Physics of Plasmas, Vol. 21, Issue 9; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 20 works

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X-point ion orbit physics in scrape-off layer and generation of a localized electrostatic potential perturbation around X-point Chang, C. S.; Ku, S.; Churchill, R. M. Physics of Plasmas, Vol. 26, Issue 1 https://doi.org/10.1063/1.5072795	journal	January 2019
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Improvements to an ion orbit loss calculation in the tokamak edge Wilks, T. M.; Stacey, W. M. Physics of Plasmas, Vol. 23, Issue 12 https://doi.org/10.1063/1.4968219	journal	December 2016
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Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation Keramidas Charidakos, I.; Myra, J. R.; Parker, S. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5037723	journal	July 2018
Analysis Of Equilibrium And Turbulent Fluxes Across The Separatrix In A Gyrokinetic Simulation [Supplementary Data] Charidakos, Ioannis Keramidas; Myra, James; Parker, Scott Zenodo-Supplementary information for journal article at DOI: 10.1063/1.5037723, 15 files (333.7 kB) https://doi.org/10.5281/zenodo.1230040	dataset	April 2018
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Analysis Of Equilibrium And Turbulent Fluxes Across The Separatrix In A Gyrokinetic Simulation [Supplementary Data] Charidakos, Ioannis Keramidas; Myra, James; Parker, Scott Zenodo-Supplementary information for journal article at DOI: 10.1063/1.5037723, 15 files (333.7 kB) https://doi.org/10.5281/zenodo.1230039	dataset	April 2018
Analysis of equilibrium and turbulent fluxes across the separatrix in a gyrokinetic simulation Charidakos, I. Keramidas; Myra, J. R.; Parker, S. arXiv https://doi.org/10.48550/arxiv.1804.10301	text	January 2018

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