Modeling the effect of lithium-induced pedestal profiles on scrape-off-layer turbulence and the heat flux width

Russell, David A.; D'Ippolito, Daniel A.; Myra, James R.; Canik, John M.; Gray, Travis K.; Zweben, Stewart J.

doi:10.1063/1.4930285

Title: Modeling the effect of lithium-induced pedestal profiles on scrape-off-layer turbulence and the heat flux width

Journal Article · Tue Sep 01 00:00:00 EDT 2015 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4930285· OSTI ID:1214444

^[1];

^[1]; Canik, John M. ^[2]; Gray, Travis K. ^[2];

^[3]

Lodestar Research Corporation, Boulder, CO (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

The effect of lithium (Li) wall coatings on scrape-off-layer (SOL)turbulence in the National Spherical Torus Experiment (NSTX) is modeled with the Lodestar SOLT (SOLTurbulence) code. Specifically, the implications for the SOL heat flux width of experimentally observed, Li-induced changes in the pedestal profiles are considered. The SOLT code used in the modeling has been expanded recently to include ion temperature evolution and ion diamagnetic drift effects. This work focuses on two NSTX discharges occurring pre- and with-Li deposition. The simulation density and temperature profiles are constrained, inside the last closed flux surface only, to match those measured in the two experiments, and the resulting drift-interchange-driven turbulence is explored. The effect of Li enters the simulation only through the pedestal profile constraint: Li modifies the experimental density and temperature profiles in the pedestal, and these profiles affect the simulated SOLturbulence. The power entering the SOL measured in the experiments is matched in the simulations by adjusting “free” dissipation parameters (e.g., diffusion coefficients) that are not measured directly in the experiments. With power-matching, (a) the heat flux SOL width is smaller, as observed experimentally by infrared thermography and (b) the simulated density fluctuation amplitudes are reduced with Li, as inferred for the experiments as well from reflectometry analysis. Furthermore, the instabilities and saturation mechanisms that underlie the SOLT model equilibria are also discussed.

View Accepted Manuscript (DOE)

View Accepted Manuscript (Publisher)

Cite

Export

Save

Research Organization:: Lodestar Research Corp., Boulder, CO (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-02ER54678; FG02-97ER54392; AC05-00OR22725

OSTI ID:: 1214444

Alternate ID(s):: OSTI ID: 1229665; OSTI ID: 1265990

Report Number(s):: LRC-15-163; PHPAEN

Journal Information:: Physics of Plasmas, Vol. 22, Issue 9; ISSN 1070-664X

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

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 15 works

Citation information provided by
Web of Science

References (40)

The effect of lithium surface coatings on plasma performance in the National Spherical Torus Experiment Kugel, H. W.; Bell, M. G.; Ahn, J. -W. Physics of Plasmas, Vol. 15, Issue 5 https://doi.org/10.1063/1.2906260	journal	May 2008
Plasma response to lithium-coated plasma-facing components in the National Spherical Torus Experiment Bell, M. G.; Kugel, H. W.; Kaita, R. Plasma Physics and Controlled Fusion, Vol. 51, Issue 12 https://doi.org/10.1088/0741-3335/51/12/124054	journal	November 2009
Edge microstability of NSTX plasmas without and with lithium-coated plasma-facing components Canik, J. M.; Guttenfelder, W.; Maingi, R. Nuclear Fusion, Vol. 53, Issue 11 https://doi.org/10.1088/0029-5515/53/11/113016	journal	September 2013
Edge-Localized-Mode Suppression through Density-Profile Modification with Lithium-Wall Coatings in the National Spherical Torus Experiment Maingi, R.; Osborne, T. H.; LeBlanc, B. P. Physical Review Letters, Vol. 103, Issue 7 https://doi.org/10.1103/PhysRevLett.103.075001	journal	August 2009
The effect of progressively increasing lithium coatings on plasma discharge characteristics, transport, edge profiles and ELM stability in the National Spherical Torus Experiment Maingi, R.; Boyle, D. P.; Canik, J. M. Nuclear Fusion, Vol. 52, Issue 8 https://doi.org/10.1088/0029-5515/52/8/083001	journal	June 2012
The effects of increasing lithium deposition on the power exhaust channel in NSTX Gray, T. K.; Canik, J. M.; Maingi, R. Nuclear Fusion, Vol. 54, Issue 2 https://doi.org/10.1088/0029-5515/54/2/023001	journal	January 2014
Edge transport and turbulence reduction with lithium coated plasma facing components in the National Spherical Torus Experiment Canik, J. M.; Maingi, R.; Kubota, S. Physics of Plasmas, Vol. 18, Issue 5 https://doi.org/10.1063/1.3592519	journal	May 2011
Reduced model simulations of the scrape-off-layer heat-flux width and comparison with experiment Myra, J. R.; Russell, D. A.; D’Ippolito, D. A. Physics of Plasmas, Vol. 18, Issue 1 https://doi.org/10.1063/1.3526676	journal	January 2011
Numerical investigation of edge plasma phenomena in an enhanced D-alpha discharge at Alcator C-Mod: Parallel heat flux and quasi-coherent edge oscillations Russell, D. A.; D’Ippolito, D. A.; Myra, J. R. Physics of Plasmas, Vol. 19, Issue 8 https://doi.org/10.1063/1.4747503	journal	August 2012
Numerical scalings of the decay lengths in the scrape-off layer Militello, F.; Naulin, V.; Nielsen, A. H. Plasma Physics and Controlled Fusion, Vol. 55, Issue 7 https://doi.org/10.1088/0741-3335/55/7/074010	journal	June 2013
Theory of the scrape-off layer width in inner-wall limited tokamak plasmas Halpern, F. D.; Ricci, P.; Jolliet, S. Nuclear Fusion, Vol. 54, Issue 4 https://doi.org/10.1088/0029-5515/54/4/043003	journal	March 2014
Turbulent regimes in the tokamak scrape-off layer Mosetto, Annamaria; Halpern, Federico D.; Jolliet, Sébastien Physics of Plasmas, Vol. 20, Issue 9 https://doi.org/10.1063/1.4821597	journal	September 2013
Electron temperature gradient induced instability in tokamak scrape-off layers Berk, H. -L; Cohen, R. H.; Ryutov, D. D. Nuclear Fusion, Vol. 33, Issue 2 https://doi.org/10.1088/0029-5515/33/2/I07	journal	February 1993
Recent theoretical progress in understanding coherent structures in edge and SOL turbulence Krasheninnikov, S. I.; D'Ippolito, D. A.; Myra, J. R. Journal of Plasma Physics, Vol. 74, Issue 5 https://doi.org/10.1017/S0022377807006940	journal	October 2008
Magnetic field dependence of the blob dynamics in the edge of ASDEX upgrade L-mode plasmas Birkenmeier, G.; Laggner, F. M.; Willensdorfer, M. Plasma Physics and Controlled Fusion, Vol. 56, Issue 7 https://doi.org/10.1088/0741-3335/56/7/075019	journal	June 2014
The influence of finite ion temperature on plasma blob dynamics Manz, P.; Birkenmeier, G.; Carralero, D. Plasma Physics and Controlled Fusion, Vol. 57, Issue 1 https://doi.org/10.1088/0741-3335/57/1/014012	journal	November 2014
Effects of the parallel electron dynamics and finite ion temperature on the plasma blob propagation in the scrape-off layer Jovanović, D.; Shukla, P. K.; Pegoraro, F. Physics of Plasmas, Vol. 15, Issue 11 https://doi.org/10.1063/1.3008050	journal	November 2008
The influence of finite Larmor radius effects on the radial interchange motions of plasma filaments Madsen, Jens; Garcia, Odd E.; Stærk Larsen, Jeppe Physics of Plasmas, Vol. 18, Issue 11 https://doi.org/10.1063/1.3658033	journal	November 2011
Filament velocity scaling laws for warm ions Manz, P.; Carralero, D.; Birkenmeier, G. Physics of Plasmas, Vol. 20, Issue 10 https://doi.org/10.1063/1.4824799	journal	October 2013
Role of ion temperature on scrape-off layer plasma turbulence Bisai, N.; Kaw, P. K. Physics of Plasmas, Vol. 20, Issue 4 https://doi.org/10.1063/1.4801737	journal	April 2013
Radial convection of finite ion temperature, high amplitude plasma blobs Wiesenberger, M.; Madsen, J.; Kendl, A. Physics of Plasmas, Vol. 21, Issue 9 https://doi.org/10.1063/1.4894220	journal	September 2014
Finite ion temperature effects on scrape-off layer turbulence Mosetto, Annamaria; Halpern, Federico D.; Jolliet, Sébastien Physics of Plasmas, Vol. 22, Issue 1 https://doi.org/10.1063/1.4904300	journal	January 2015
Drift-ordered fluid equations for field-aligned modes in low-β collisional plasma with equilibrium pressure pedestals Simakov, Andrei N.; Catto, Peter J. Physics of Plasmas, Vol. 10, Issue 12 https://doi.org/10.1063/1.1623492	journal	December 2003
Status and verification of edge plasma turbulence code BOUT Umansky, M. V.; Xu, X. Q.; Dudson, B. Computer Physics Communications, Vol. 180, Issue 6 https://doi.org/10.1016/j.cpc.2008.12.012	journal	June 2009
Effects of parallel electron dynamics on plasma blob transport Angus, Justin R.; Krasheninnikov, Sergei I.; Umansky, Maxim V. Physics of Plasmas, Vol. 19, Issue 8 https://doi.org/10.1063/1.4747619	journal	August 2012
Multi-machine scaling of the divertor peak heat flux and width for L-mode and H-mode discharges Loarte, A.; Bosch, S.; Chankin, A. Journal of Nuclear Materials, Vol. 266-269 https://doi.org/10.1016/S0022-3115(98)00590-X	journal	March 1999
Turbulent transport regimes and the scrape-off layer heat flux width Myra, J. R.; D'Ippolito, D. A.; Russell, D. A. Physics of Plasmas, Vol. 22, Issue 4 https://doi.org/10.1063/1.4919255	journal	April 2015
Edge turbulence velocity changes with lithium coating on NSTX Cao, B.; Zweben, S. J.; Stotler, D. P. Plasma Physics and Controlled Fusion, Vol. 54, Issue 11 https://doi.org/10.1088/0741-3335/54/11/112001	journal	October 2012
Edge and SOL turbulence and blob variations over a large database in NSTX Zweben, S. J.; Davis, W. M.; Kaye, S. M. Nuclear Fusion, Vol. 55, Issue 9 https://doi.org/10.1088/0029-5515/55/9/093035	journal	September 2015
Edge transport studies in the edge and scrape-off layer of the National Spherical Torus Experiment with Langmuir probes Boedo, J. A.; Myra, J. R.; Zweben, S. Physics of Plasmas, Vol. 21, Issue 4 https://doi.org/10.1063/1.4873390	journal	April 2014
Experimental studies of edge turbulence and confinement in Alcator C-Mod Cziegler, I.; Terry, J. L.; Hughes, J. W. Physics of Plasmas, Vol. 17, Issue 5 https://doi.org/10.1063/1.3421577	journal	May 2010
Kinetic effects on ballooning modes in mirror machines Tang, W. M. Physics of Fluids, Vol. 24, Issue 7 https://doi.org/10.1063/1.863533	journal	January 1981
Midplane neutral density profiles in the National Spherical Torus Experiment Stotler, D. P.; Scotti, F.; Bell, R. E. Physics of Plasmas, Vol. 22, Issue 8 https://doi.org/10.1063/1.4928372	journal	August 2015
Edge sheared flows and the dynamics of blob-filaments Myra, J. R.; Davis, W. M.; D'Ippolito, D. A. Nuclear Fusion, Vol. 53, Issue 7 https://doi.org/10.1088/0029-5515/53/7/073013	journal	June 2013
A collisional drift wave description of plasma edge turbulence Wakatani, Masahiro; Hasegawa, Akira Physics of Fluids, Vol. 27, Issue 3 https://doi.org/10.1063/1.864660	journal	January 1984
Convective transport by intermittent blob-filaments: Comparison of theory and experiment D’Ippolito, D. A.; Myra, J. R.; Zweben, S. J. Physics of Plasmas, Vol. 18, Issue 6 https://doi.org/10.1063/1.3594609	journal	June 2011
The Plasma Boundary of Magnetic Fusion Devices Stangeby, P. Series in Plasma Physics https://doi.org/10.1201/9781420033328	book	January 2000
Modeling of large amplitude plasma blobs in three-dimensions Angus, Justin R.; Umansky, Maxim V. Physics of Plasmas, Vol. 21, Issue 1 https://doi.org/10.1063/1.4863503	journal	January 2014
Elements of Multigrid Briggs, William L.; Henson, Van Emden; McCormick, Steve F. A Multigrid Tutorial, Second Edition https://doi.org/10.1137/1.9780898719505.ch3	book	January 2000
Two-dimensional modelling of blob dynamics in tokamak edge plasmas Yu, G. Q.; Krasheninnikov, S. I.; Guzdar, P. N. Physics of Plasmas, Vol. 13, Issue 4 https://doi.org/10.1063/1.2193087	journal	April 2006

Cited By (11)

Observation of quasi-coherent edge fluctuations in Ohmic plasmas on National Spherical Torus Experiment Banerjee, Santanu; Diallo, A.; Zweben, S. J. Physics of Plasmas, Vol. 23, Issue 4 https://doi.org/10.1063/1.4946871	journal	April 2016
Theory based scaling of edge turbulence and implications for the scrape-off layer width Myra, J. R.; Russell, D. A.; Zweben, S. J. Physics of Plasmas, Vol. 23, Issue 11 https://doi.org/10.1063/1.4966564	journal	November 2016
Filamentary velocity scaling validation in the TCV tokamak Tsui, C. K.; Boedo, J. A.; Myra, J. R. Physics of Plasmas, Vol. 25, Issue 7 https://doi.org/10.1063/1.5038019	journal	July 2018
Modification of plasma flows in edge and SOL regions by influence of neutral gas Bisai, N.; Banerjee, Santanu; Sangwan, Deepak Physics of Plasmas, Vol. 25, Issue 10 https://doi.org/10.1063/1.5046723	journal	October 2018
A reduced model of neutral-plasma interactions in the edge and scrape-off-layer: Verification comparisons with kinetic Monte Carlo simulations Russell, D. A.; Myra, J. R.; Stotler, D. P. Physics of Plasmas, Vol. 26, Issue 2 https://doi.org/10.1063/1.5081670	journal	February 2019
The influence of temperature dynamics and dynamic finite ion Larmor radius effects on seeded high amplitude plasma blobs Held, M.; Wiesenberger, M.; Madsen, J. Nuclear Fusion, Vol. 56, Issue 12 https://doi.org/10.1088/0029-5515/56/12/126005	journal	September 2016
Blob-hole correlation model for edge turbulence and comparisons with NSTX gas puff imaging data Myra, J. R.; Zweben, S. J.; Russell, D. A. Plasma Physics and Controlled Fusion, Vol. 60, Issue 7 https://doi.org/10.1088/1361-6587/aac4fc	journal	June 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
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.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

Similar Records

Modeling the effect of lithium-induced pedestal profiles on scrape-off-layer turbulence and the heat flux width

Journal Article · Tue Sep 15 00:00:00 EDT 2015 · Physics of Plasmas · OSTI ID:1214444

D'Ippolito, D. A.; Myra, J. R.; Canik, J. M.; +2 more

Reduced model simulations of the scrape-off-layer heat-flux width and comparison with experiment

Journal Article · Sat Jan 01 00:00:00 EST 2011 · Physics of Plasmas · OSTI ID:1214444

Myra, J. R.; Russell, D. A.; D’Ippolito, D. A.; +8 more

Turbulent Transport and the Scrape-off-layer Width

Conference · Sat Jan 01 00:00:00 EST 2011 · OSTI ID:1214444

Myra, J R; Russell, D A; Ahn, J W; +7 more

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
tokamak
scrape-off layer
turbulence
heat flux width
36 MATERIALS SCIENCE
turbulence simulations
lithium
turbulent transport processes
tokamaks
plasma turbulence

Title: Modeling the effect of lithium-induced pedestal profiles on scrape-off-layer turbulence and the heat flux width

Citation Formats

References (40)

Cited By (11)

Similar Records

Related Subjects