M3D-C1 simulations of the plasma response to RMPs in NSTX-U single-null and snowflake divertor configurations

Canal, G. P.; Ferraro, N. M.; Evans, T. E.; Osborne, T. H.; Menard, J. E.; Ahn, J. -W.; Maingi, R.; Wingen, A.; Ciro, D.; Frerichs, H.; Schmitz, O.; Soukhanoviskii, V.; Waters, I.; Sabbagh, S. A.

doi:10.1088/1741-4326/aa6e10

M3D-C1 simulations of the plasma response to RMPs in NSTX-U single-null and snowflake divertor configurations

Journal Article · Thu Apr 20 00:00:00 EDT 2017 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/aa6e10· OSTI ID:1373377

Canal, G. P. ^[1]; Ferraro, N. M. ^[2]; Evans, T. E. ^[3]; Osborne, T. H. ^[3]; Menard, J. E. ^[2]; Ahn, J. -W. ^[4]; Maingi, R. ^[2]; Wingen, A. ^[4]; Ciro, D. ^[5]; Frerichs, H. ^[6]; Schmitz, O. ^[6]; Soukhanoviskii, V. ^[7]; Waters, I. ^[6]; Sabbagh, S. A. ^[8]

General Atomics, San Diego, CA (United States); Oak Ridge Associated Univ., Oak Ridge, TN (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
General Atomics, San Diego, CA (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Univ. of Sao Paulo (Brazil). Dept. of Applied Physics
Univ. of Wisconsin, Madison, WI (United States). Dept. of Engineering Physics
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics

Here in this work, single- and two-fluid resistive magnetohydrodynamic calculations of the plasma response to n = 3 magnetic perturbations in single-null (SN) and snowflake (SF) divertor configurations are compared with those based on the vacuum approach. The calculations are performed using the code M3D-C¹ and are based on simulated NSTX-U plasmas. Significantly different plasma responses were found from these calculations, with the difference between the single- and two-fluid plasma responses being caused mainly by the different screening mechanism intrinsic to each of these models. Although different plasma responses were obtained from these different plasma models, no significant difference between the SN and SF plasma responses were found. However, due to their different equilibrium properties, magnetic perturbations cause the SF configuration to develop additional and longer magnetic lobes in the null-point region than the SN, regardless of the plasma model used. The intersection of these longer and additional lobes with the divertor plates are expected to cause more striations in the particle and heat flux target profiles. In addition, the results indicate that the size of the magnetic lobes, in both single-null and snowflake configurations, are more sensitive to resonant magnetic perturbations than to non-resonant magnetic perturbations.

View Accepted Manuscript (DOE)

Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: SC0012706; FC02-04ER54698; AC05-06OR23100; AC02-09CH11466; AC05-00OR22725; SC0012315; SC0013911; AC52-07NA27344; SC0008520

OSTI ID:: 1373377

Alternate ID(s):: OSTI ID: 1771442
OSTI ID: 1374813
OSTI ID: 1376338
OSTI ID: 22925759

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 7 Vol. 57; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

References (37)

A triangular finite element with first-derivative continuity applied to fusion MHD applications Jardin, S. C. Journal of Computational Physics, Vol. 200, Issue 1 https://doi.org/10.1016/j.jcp.2004.04.004	journal	October 2004
“Snowflake” divertor configuration in NSTX Soukhanovskii, V. A.; Ahn, J. -W.; Bell, R. E. Journal of Nuclear Materials, Vol. 415, Issue 1 https://doi.org/10.1016/j.jnucmat.2010.07.047	journal	August 2011
Advanced divertor configurations with large flux expansion Soukhanovskii, V. A.; Bell, R. E.; Diallo, A. Journal of Nuclear Materials, Vol. 438 https://doi.org/10.1016/j.jnucmat.2013.01.015	journal	July 2013
Modeling of stochastic magnetic flux loss from the edge of a poloidally diverted tokamak Evans, T. E.; Moyer, R. A.; Monat, P. Physics of Plasmas, Vol. 9, Issue 12 https://doi.org/10.1063/1.1521125	journal	December 2002
Geometrical properties of a “snowflake” divertor Ryutov, D. D. Physics of Plasmas, Vol. 14, Issue 6 https://doi.org/10.1063/1.2738399	journal	June 2007
On description of magnetic stochasticity in poloidal divertor tokamaks Abdullaev, S. S.; Jakubowski, M.; Lehnen, M. Physics of Plasmas, Vol. 15, Issue 4 https://doi.org/10.1063/1.2907163	journal	January 2008
Ideal and resistive edge stability calculations with M3D-C1 Ferraro, N. M.; Jardin, S. C.; Snyder, P. B. Physics of Plasmas, Vol. 17, Issue 10 https://doi.org/10.1063/1.3492727	journal	October 2010
Calculations of two-fluid linear response to non-axisymmetric fields in tokamaks Ferraro, N. M. Physics of Plasmas, Vol. 19, Issue 5 https://doi.org/10.1063/1.3694657	journal	May 2012
Snowflake divertor configuration studies in National Spherical Torus Experiment Soukhanovskii, V. A.; Bell, R. E.; Diallo, A. Physics of Plasmas, Vol. 19, Issue 8 https://doi.org/10.1063/1.4737117	journal	August 2012
The snowflake divertor Ryutov, D. D.; Soukhanovskii, V. A. Physics of Plasmas, Vol. 22, Issue 11 https://doi.org/10.1063/1.4935115	journal	November 2015
Exploration of magnetic perturbation effects on advanced divertor configurations in NSTX-U Frerichs, H.; Schmitz, O.; Waters, I. Physics of Plasmas, Vol. 23, Issue 6, Article No. 062517 https://doi.org/10.1063/1.4954816	journal	June 2016
Magnetohydrodynamic stability of tokamak edge plasmas Connor, J. W.; Hastie, R. J.; Wilson, H. R. Physics of Plasmas, Vol. 5, Issue 7 https://doi.org/10.1063/1.872956	journal	July 1998
Modification of high mode pedestal instabilities in the DIII-D tokamak Ferron, J. R.; Chu, M. S.; Jackson, G. L. Physics of Plasmas, Vol. 7, Issue 5 https://doi.org/10.1063/1.874053	journal	May 2000
Modelling of stochastic magnetic perturbation by RWMEF coils on NSTX Yan, Longwen; Evans, T. E.; Kaye, S. M. Nuclear Fusion, Vol. 46, Issue 10 https://doi.org/10.1088/0029-5515/46/10/003	journal	August 2006
Investigation of resistive wall mode stabilization physics in high-beta plasmas using applied non-axisymmetric fields in NSTX Sontag, A. C.; Sabbagh, S. A.; Zhu, W. Nuclear Fusion, Vol. 47, Issue 8 https://doi.org/10.1088/0029-5515/47/8/035	journal	August 2007
Study of in-vessel nonaxisymmetric ELM suppression coil concepts for ITER Schaffer, M. J.; Menard, J. E.; Aldan, M. P. Nuclear Fusion, Vol. 48, Issue 2 https://doi.org/10.1088/0029-5515/48/2/024004	journal	January 2008
Theory and observations of magnetic islands Waelbroeck, F. L. Nuclear Fusion, Vol. 49, Issue 10 https://doi.org/10.1088/0029-5515/49/10/104025	journal	September 2009
High resolution numerical studies of separatrix splitting due to non-axisymmetric perturbation in DIII-D Wingen, A.; Evans, T. E.; Spatschek, K. H. Nuclear Fusion, Vol. 49, Issue 5 https://doi.org/10.1088/0029-5515/49/5/055027	journal	April 2009
Quasi-linear MHD modelling of H-mode plasma response to resonant magnetic perturbations Nardon, E.; Tamain, P.; Bécoulet, M. Nuclear Fusion, Vol. 50, Issue 3 https://doi.org/10.1088/0029-5515/50/3/034002	journal	February 2010
Summary of the International Workshop on Magnetic Fusion Energy (MFE) Roadmapping in the ITER Era; 7–10 September 2011, Princeton, NJ, USA Neilson, G. H.; Federici, G.; Li, J. Nuclear Fusion, Vol. 52, Issue 4 https://doi.org/10.1088/0029-5515/52/4/047001	journal	March 2012
On the physics guidelines for a tokamak DEMO Zohm, H.; Angioni, C.; Fable, E. Nuclear Fusion, Vol. 53, Issue 7 https://doi.org/10.1088/0029-5515/53/7/073019	journal	June 2013
Scaling of the tokamak near the scrape-off layer H-mode power width and implications for ITER Eich, T.; Leonard, A. W.; Pitts, R. A. Nuclear Fusion, Vol. 53, Issue 9 https://doi.org/10.1088/0029-5515/53/9/093031	journal	August 2013
Local measurements of screening currents driven by applied RMPs on TEXTOR Denner, P.; Liang, Y.; Yang, Y. Nuclear Fusion, Vol. 54, Issue 6 https://doi.org/10.1088/0029-5515/54/6/064003	journal	May 2014
Enhanced $\boldsymbol{\vec{{E}}\times \vec{{B}}}$ drift effects in the TCV snowflake divertor Canal, G. P.; Lunt, T.; Reimerdes, H. Nuclear Fusion, Vol. 55, Issue 12 https://doi.org/10.1088/0029-5515/55/12/123023	journal	November 2015
The ‘churning mode’ of plasma convection in the tokamak divertor region Ryutov, D. D.; Cohen, R. H.; Farmer, W. A. Physica Scripta, Vol. 89, Issue 8 https://doi.org/10.1088/0031-8949/89/8/088002	journal	July 2014
Corrigendum: The ‘churning mode’ of plasma convection in the tokamak divertor region (2014 Phys. Scr. 89 088002) Ryutov, D. D.; Cohen, R. H.; Farmer, W. A. Physica Scripta, Vol. 90, Issue 9 https://doi.org/10.1088/0031-8949/90/9/099501	journal	August 2015
Resonance processes in magnetic traps Chirikov, B. V. Journal of Nuclear Energy. Part C, Plasma Physics, Accelerators, Thermonuclear Research, Vol. 1, Issue 4 https://doi.org/10.1088/0368-3281/1/4/311	journal	January 1960
Experimental divertor physics Pitcher, C. S.; Stangeby, P. C. Plasma Physics and Controlled Fusion, Vol. 39, Issue 6 https://doi.org/10.1088/0741-3335/39/6/001	journal	June 1997
Characteristics of type I ELM energy and particle losses in existing devices and their extrapolation to ITER Loarte, A.; Saibene, G.; Sartori, R. Plasma Physics and Controlled Fusion, Vol. 45, Issue 9 https://doi.org/10.1088/0741-3335/45/9/302	journal	August 2003
Characterization of peeling–ballooning stability limits on the pedestal Snyder, P. B.; Wilson, H. R.; Osborne, T. H. Plasma Physics and Controlled Fusion, Vol. 46, Issue 5A https://doi.org/10.1088/0741-3335/46/5A/014	journal	April 2004
Magneto-hydrodynamic stability of the H-mode transport barrier as a model for edge localized modes: an overview Wilson, H. R.; Cowley, S. C.; Kirk, A. Plasma Physics and Controlled Fusion, Vol. 48, Issue 5A https://doi.org/10.1088/0741-3335/48/5A/S06	journal	April 2006
Snowflake divertor plasmas on TCV Piras, F.; Coda, S.; Furno, I. Plasma Physics and Controlled Fusion, Vol. 51, Issue 5 https://doi.org/10.1088/0741-3335/51/5/055009	journal	March 2009
Power distribution in the snowflake divertor in TCV Reimerdes, H.; Canal, G. P.; Duval, B. P. Plasma Physics and Controlled Fusion, Vol. 55, Issue 12 https://doi.org/10.1088/0741-3335/55/12/124027	journal	November 2013
First EMC3-Eirene simulations of the TCV snowflake divertor Lunt, T.; Canal, G. P.; Feng, Y. Plasma Physics and Controlled Fusion, Vol. 56, Issue 3 https://doi.org/10.1088/0741-3335/56/3/035009	journal	February 2014
Resonant magnetic perturbations of edge-plasmas in toroidal confinement devices Evans, T. E. Plasma Physics and Controlled Fusion, Vol. 57, Issue 12 https://doi.org/10.1088/0741-3335/57/12/123001	journal	November 2015
Experimental signatures of homoclinic tangles in poloidally diverted tokamaks Evans, T. E.; Roeder, R. K. W.; Carter, J. A. Journal of Physics: Conference Series, Vol. 7 https://doi.org/10.1088/1742-6596/7/1/015	journal	January 2005
“Snowflake” H Mode in a Tokamak Plasma Piras, F.; Coda, S.; Duval, B. P. Physical Review Letters, Vol. 105, Issue 15 https://doi.org/10.1103/PhysRevLett.105.155003	journal	October 2010

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M3D-C1 simulations of the plasma response to RMPs in NSTX-U single-null and snowflake divertor configurations

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M3D-C1 simulations of the plasma response to RMPs in NSTX-U single-null and snowflake divertor configurations

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