Non-linear modeling of the plasma response to RMPs in ASDEX Upgrade

F. Orain; M. Hölzl; E. Viezzer; M. Dunne; M. Bécoulet; P. Cahyna; G.T.A. Huijsmans; J. Morales; M. Willensdorfer; W. Suttrop; A. Kirk; S. Pamela; S. Günter; K. Lackner; E. Strumberger; A. Lessig

doi:10.1088/0029-5515/57/2/022013

Non-linear modeling of the plasma response to RMPs in ASDEX Upgrade

F. Orain, M. Hölzl, E. Viezzer, M. Dunne, M. Bécoulet, P. Cahyna, G.T.A. Huijsmans, J. Morales, M. Willensdorfer, W. Suttrop, A. Kirk, S. Pamela, S. Günter, K. Lackner, E. Strumberger, A. Lessig

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Abstract

The plasma response to resonant magnetic perturbations (RMPs) in ASDEX Upgrade is modeled with the non-linear resistive MHD code JOREK, using input profiles that match those of the experiments as closely as possible. The RMP configuration for which edge localized modes are best mitigated in experiments is related to the largest edge kink response observed near the X-point in modeling. On the edge resonant surfaces q = m/n, the coupling between the kink component (m > nq) and the m resonant component is found to induce the amplification of the resonant magnetic perturbation. The ergodicity and the 3D-displacement near the X-point induced by the resonant amplification can only partly explain the density pumpout observed in experiments.

Original language	English
Article number	22013
Pages (from-to)	1-13
Journal	Nuclear Fusion
Volume	57
Issue number	2
DOIs	https://doi.org/10.1088/0029-5515/57/2/022013
Publication status	Published - 1 Feb 2017

Keywords

ASDEX Upgrade
ELM
MHD
RMP
density pumpout
kink amplification
non-linear modeling

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10.1088/0029-5515/57/2/022013

http://adsabs.harvard.edu/abs/2017NucFu..57b2013O

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Orain, F., Hölzl, M., Viezzer, E., Dunne, M., Bécoulet, M., Cahyna, P., Huijsmans, G. T. A., Morales, J., Willensdorfer, M., Suttrop, W., Kirk, A., Pamela, S., Günter, S., Lackner, K., Strumberger, E., & Lessig, A. (2017). Non-linear modeling of the plasma response to RMPs in ASDEX Upgrade. Nuclear Fusion, 57(2), 1-13. Article 22013. https://doi.org/10.1088/0029-5515/57/2/022013

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abstract = "The plasma response to resonant magnetic perturbations (RMPs) in ASDEX Upgrade is modeled with the non-linear resistive MHD code JOREK, using input profiles that match those of the experiments as closely as possible. The RMP configuration for which edge localized modes are best mitigated in experiments is related to the largest edge kink response observed near the X-point in modeling. On the edge resonant surfaces q = m/n, the coupling between the kink component (m > nq) and the m resonant component is found to induce the amplification of the resonant magnetic perturbation. The ergodicity and the 3D-displacement near the X-point induced by the resonant amplification can only partly explain the density pumpout observed in experiments.",

keywords = "ASDEX Upgrade, ELM, MHD, RMP, density pumpout, kink amplification, non-linear modeling",

author = "F. Orain and M. H{\"o}lzl and E. Viezzer and M. Dunne and M. B{\'e}coulet and P. Cahyna and G.T.A. Huijsmans and J. Morales and M. Willensdorfer and W. Suttrop and A. Kirk and S. Pamela and S. G{\"u}nter and K. Lackner and E. Strumberger and A. Lessig",

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doi = "10.1088/0029-5515/57/2/022013",

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AU - Orain, F.

AU - Hölzl, M.

AU - Viezzer, E.

AU - Dunne, M.

AU - Bécoulet, M.

AU - Cahyna, P.

AU - Huijsmans, G.T.A.

AU - Morales, J.

AU - Willensdorfer, M.

AU - Suttrop, W.

AU - Kirk, A.

AU - Pamela, S.

AU - Günter, S.

AU - Lackner, K.

AU - Strumberger, E.

AU - Lessig, A.

PY - 2017/2/1

Y1 - 2017/2/1

N2 - The plasma response to resonant magnetic perturbations (RMPs) in ASDEX Upgrade is modeled with the non-linear resistive MHD code JOREK, using input profiles that match those of the experiments as closely as possible. The RMP configuration for which edge localized modes are best mitigated in experiments is related to the largest edge kink response observed near the X-point in modeling. On the edge resonant surfaces q = m/n, the coupling between the kink component (m > nq) and the m resonant component is found to induce the amplification of the resonant magnetic perturbation. The ergodicity and the 3D-displacement near the X-point induced by the resonant amplification can only partly explain the density pumpout observed in experiments.

AB - The plasma response to resonant magnetic perturbations (RMPs) in ASDEX Upgrade is modeled with the non-linear resistive MHD code JOREK, using input profiles that match those of the experiments as closely as possible. The RMP configuration for which edge localized modes are best mitigated in experiments is related to the largest edge kink response observed near the X-point in modeling. On the edge resonant surfaces q = m/n, the coupling between the kink component (m > nq) and the m resonant component is found to induce the amplification of the resonant magnetic perturbation. The ergodicity and the 3D-displacement near the X-point induced by the resonant amplification can only partly explain the density pumpout observed in experiments.

KW - ASDEX Upgrade

KW - ELM

KW - MHD

KW - RMP

KW - density pumpout

KW - kink amplification

KW - non-linear modeling

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U2 - 10.1088/0029-5515/57/2/022013

DO - 10.1088/0029-5515/57/2/022013

M3 - Article

SN - 0029-5515

VL - 57

SP - 1

EP - 13

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 2

M1 - 22013

ER -

Non-linear modeling of the plasma response to RMPs in ASDEX Upgrade

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Keywords

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