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**Harvard**

Chapman, I., Becoulet, M., Bird, T., Canik, J., Cianciosa, M., Cooper, W., Evans, T., Ferraro, N., Fuchs, C., Gryaznevich, M., Gribov, Y., Ham, C., Hanson, J., Huijsmans, G., Kirk, A., Lazerson, S., Liang, Y., Lupelli, I., Moyer, R., Nuehrenberg, C., Orain, F., Orlov, D., Suttrop, W. och Yadykin, D. (2014) *Three-dimensional distortions of the tokamak plasma boundary: boundary displacements in the presence of resonant magnetic perturbations*.

** BibTeX **

@article{

Chapman2014,

author={Chapman, I. T. and Becoulet, M. and Bird, T. and Canik, J. and Cianciosa, M. and Cooper, W. A. and Evans, T. and Ferraro, N. and Fuchs, C. and Gryaznevich, M. and Gribov, Y. and Ham, C. and Hanson, J. and Huijsmans, G. and Kirk, A. and Lazerson, S. and Liang, Y. and Lupelli, I. and Moyer, R. A. and Nuehrenberg, C. and Orain, F. and Orlov, D. and Suttrop, W. and Yadykin, Dimitriy},

title={Three-dimensional distortions of the tokamak plasma boundary: boundary displacements in the presence of resonant magnetic perturbations},

journal={Nuclear Fusion},

issn={0029-5515},

volume={54},

issue={8},

pages={Article no. 083006},

abstract={The three-dimensional plasma boundary displacements induced by applied non-axisymmetric magnetic perturbations have been measured in ASDEX Upgrade, DIII-D, JET, MAST and NSTX. The displacements arising from applied resonant magnetic perturbations (RMPs) are measured up to +/- 5% of the minor radius in present-day machines. Good agreement can be found between different experimental measurements and a range of models-be it vacuum field line tracing, ideal three-dimensional MHD equilibrium modelling, or nonlinear plasma amplification. The agreement of the various experimental measurements with the different predictions from these models is presented, and the regions of applicability of each discussed. The measured displacement of the outboard boundary from various machines is found to correlate approximately linearly with the applied resonant field predicted by vacuum modelling (though it should be emphasized that one should not infer that vacuum modelling accurately predicts the displacement inside the plasma). The RMP-induced displacements foreseen in ITER are expected to lie within the range of those predicted by the different models, meaning less than +/- 1.75% (+/- 3.5 cm) of the minor radius in the H-mode baseline and less than +/- 2.5% (+/- 5 cm) in a 9MA plasma. Whilst a displacement of 7 cm peak-to-peak in the baseline scenario is marginally acceptable from both a plasma control and heat loading perspective, it is important that ITER adopts a plasma control system which can account for a three-dimensional boundary corrugation to avoid an n = 0 correction which would otherwise locally exacerbate the displacement caused by the applied fields.},

year={2014},

keywords={edge-localized modes, physics, pedestal, ITER, stability},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 205672

A1 Chapman, I. T.

A1 Becoulet, M.

A1 Bird, T.

A1 Canik, J.

A1 Cianciosa, M.

A1 Cooper, W. A.

A1 Evans, T.

A1 Ferraro, N.

A1 Fuchs, C.

A1 Gryaznevich, M.

A1 Gribov, Y.

A1 Ham, C.

A1 Hanson, J.

A1 Huijsmans, G.

A1 Kirk, A.

A1 Lazerson, S.

A1 Liang, Y.

A1 Lupelli, I.

A1 Moyer, R. A.

A1 Nuehrenberg, C.

A1 Orain, F.

A1 Orlov, D.

A1 Suttrop, W.

A1 Yadykin, Dimitriy

T1 Three-dimensional distortions of the tokamak plasma boundary: boundary displacements in the presence of resonant magnetic perturbations

YR 2014

JF Nuclear Fusion

SN 0029-5515

VO 54

IS 8

AB The three-dimensional plasma boundary displacements induced by applied non-axisymmetric magnetic perturbations have been measured in ASDEX Upgrade, DIII-D, JET, MAST and NSTX. The displacements arising from applied resonant magnetic perturbations (RMPs) are measured up to +/- 5% of the minor radius in present-day machines. Good agreement can be found between different experimental measurements and a range of models-be it vacuum field line tracing, ideal three-dimensional MHD equilibrium modelling, or nonlinear plasma amplification. The agreement of the various experimental measurements with the different predictions from these models is presented, and the regions of applicability of each discussed. The measured displacement of the outboard boundary from various machines is found to correlate approximately linearly with the applied resonant field predicted by vacuum modelling (though it should be emphasized that one should not infer that vacuum modelling accurately predicts the displacement inside the plasma). The RMP-induced displacements foreseen in ITER are expected to lie within the range of those predicted by the different models, meaning less than +/- 1.75% (+/- 3.5 cm) of the minor radius in the H-mode baseline and less than +/- 2.5% (+/- 5 cm) in a 9MA plasma. Whilst a displacement of 7 cm peak-to-peak in the baseline scenario is marginally acceptable from both a plasma control and heat loading perspective, it is important that ITER adopts a plasma control system which can account for a three-dimensional boundary corrugation to avoid an n = 0 correction which would otherwise locally exacerbate the displacement caused by the applied fields.

LA eng

DO 10.1088/0029-5515/54/8/083006

LK http://dx.doi.org/10.1088/0029-5515/54/8/083006

OL 30