Influence of poloidal equilibrium rotation in MHD simulations of edge-localized modes

S. Pamela; G.T.A. Huysmans; S. Benkadda

doi:10.1088/0741-3335/52/7/075006

Influence of poloidal equilibrium rotation in MHD simulations of edge-localized modes

S. Pamela, G.T.A. Huysmans, S. Benkadda

Research output: Contribution to journal › Article › Academic › peer-review

26 Citations (Scopus)

Abstract

In nonlinear MHD simulations of edge localized modes (ELMs) with the code JOREK, a strong m = n = 0 poloidal flow localized in the H-mode pedestal region shears density filaments off the separatrix. This flow is nonlinearly induced by the ballooning instability (Huysmans and Czarny 2007 Nucl. Fusion 47 659, Huysmans et al 2009 Plasma Phys. Control. Fusion 51 124012). An approach of the reduced resistive MHD equations used in JOREK leads to an analytical interpretation of the equilibrium flow in both circular and X-point plasmas. Transitions between two different flow structures have been found. Similar transitions between equilibrium flow states had been predicted by Strauss (1995 Phys. Plasmas 2 1229). Finally, results concerning the influence of the equilibrium flow on the linear and nonlinear stabilities of the ELM are presented. ELM-like multiple crashes were simulated.

Original language	English
Pages (from-to)	75006
Journal	Plasma Physics and Controlled Fusion
Volume	52
Issue number	7
DOIs	https://doi.org/10.1088/0741-3335/52/7/075006
Publication status	Published - 1 Jul 2010
Externally published	Yes

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10.1088/0741-3335/52/7/075006

http://adsabs.harvard.edu/abs/2010PPCF...52g5006P

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title = "Influence of poloidal equilibrium rotation in MHD simulations of edge-localized modes",

abstract = "In nonlinear MHD simulations of edge localized modes (ELMs) with the code JOREK, a strong m = n = 0 poloidal flow localized in the H-mode pedestal region shears density filaments off the separatrix. This flow is nonlinearly induced by the ballooning instability (Huysmans and Czarny 2007 Nucl. Fusion 47 659, Huysmans et al 2009 Plasma Phys. Control. Fusion 51 124012). An approach of the reduced resistive MHD equations used in JOREK leads to an analytical interpretation of the equilibrium flow in both circular and X-point plasmas. Transitions between two different flow structures have been found. Similar transitions between equilibrium flow states had been predicted by Strauss (1995 Phys. Plasmas 2 1229). Finally, results concerning the influence of the equilibrium flow on the linear and nonlinear stabilities of the ELM are presented. ELM-like multiple crashes were simulated.",

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AU - Pamela, S.

AU - Huysmans, G.T.A.

AU - Benkadda, S.

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N2 - In nonlinear MHD simulations of edge localized modes (ELMs) with the code JOREK, a strong m = n = 0 poloidal flow localized in the H-mode pedestal region shears density filaments off the separatrix. This flow is nonlinearly induced by the ballooning instability (Huysmans and Czarny 2007 Nucl. Fusion 47 659, Huysmans et al 2009 Plasma Phys. Control. Fusion 51 124012). An approach of the reduced resistive MHD equations used in JOREK leads to an analytical interpretation of the equilibrium flow in both circular and X-point plasmas. Transitions between two different flow structures have been found. Similar transitions between equilibrium flow states had been predicted by Strauss (1995 Phys. Plasmas 2 1229). Finally, results concerning the influence of the equilibrium flow on the linear and nonlinear stabilities of the ELM are presented. ELM-like multiple crashes were simulated.

AB - In nonlinear MHD simulations of edge localized modes (ELMs) with the code JOREK, a strong m = n = 0 poloidal flow localized in the H-mode pedestal region shears density filaments off the separatrix. This flow is nonlinearly induced by the ballooning instability (Huysmans and Czarny 2007 Nucl. Fusion 47 659, Huysmans et al 2009 Plasma Phys. Control. Fusion 51 124012). An approach of the reduced resistive MHD equations used in JOREK leads to an analytical interpretation of the equilibrium flow in both circular and X-point plasmas. Transitions between two different flow structures have been found. Similar transitions between equilibrium flow states had been predicted by Strauss (1995 Phys. Plasmas 2 1229). Finally, results concerning the influence of the equilibrium flow on the linear and nonlinear stabilities of the ELM are presented. ELM-like multiple crashes were simulated.

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DO - 10.1088/0741-3335/52/7/075006

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