ITER edge-localized modes control coils: The effect on fast ion losses and edge confinement properties

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@article{5a3f2f18be4d44c5ac75b51e430018c1,
title = "ITER edge-localized modes control coils: The effect on fast ion losses and edge confinement properties",
abstract = "The magnetic perturbations due to in-vessel coils, foreseen to mitigate edge-localized modes (ELMs) in ITER, could also compromise the confinement of energetic ions. We simulate the losses of fusion alpha particles and neutral beam injection-generated fast ions in ITER under the influence of the 3D perturbations caused by toroidal field coils, ferritic inserts, test blanket modules and ELM control coils (ECCs) with the ASCOT code. The ECCs are found to stochastize the magnetic field deep inside the pedestal in the 15MA inductive reference operating scenario. Such a field is found insufficient to confine not only the fast but also the thermal ion population, leading to a strongly reduced fast ion source in the edge. Therefore, even with a stochastic edge, no high fast ion power loads are expected. However, the plasma response has not yet been included in the calculation of ITER magnetic background data, and it is probable that the perturbation is currently overestimated.",
author = "T. Koskela and O. Asunta and E. Hirvijoki and T. Kurki-Suonio and S. {\"A}k{\"a}slompolo",
year = "2012",
month = "10",
doi = "10.1088/0741-3335/54/10/105008",
language = "English",
volume = "54",
journal = "Plasma Physics and Controlled Fusion",
issn = "0741-3335",
number = "10",

}

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TY - JOUR

T1 - ITER edge-localized modes control coils

T2 - The effect on fast ion losses and edge confinement properties

AU - Koskela, T.

AU - Asunta, O.

AU - Hirvijoki, E.

AU - Kurki-Suonio, T.

AU - Äkäslompolo, S.

PY - 2012/10

Y1 - 2012/10

N2 - The magnetic perturbations due to in-vessel coils, foreseen to mitigate edge-localized modes (ELMs) in ITER, could also compromise the confinement of energetic ions. We simulate the losses of fusion alpha particles and neutral beam injection-generated fast ions in ITER under the influence of the 3D perturbations caused by toroidal field coils, ferritic inserts, test blanket modules and ELM control coils (ECCs) with the ASCOT code. The ECCs are found to stochastize the magnetic field deep inside the pedestal in the 15MA inductive reference operating scenario. Such a field is found insufficient to confine not only the fast but also the thermal ion population, leading to a strongly reduced fast ion source in the edge. Therefore, even with a stochastic edge, no high fast ion power loads are expected. However, the plasma response has not yet been included in the calculation of ITER magnetic background data, and it is probable that the perturbation is currently overestimated.

AB - The magnetic perturbations due to in-vessel coils, foreseen to mitigate edge-localized modes (ELMs) in ITER, could also compromise the confinement of energetic ions. We simulate the losses of fusion alpha particles and neutral beam injection-generated fast ions in ITER under the influence of the 3D perturbations caused by toroidal field coils, ferritic inserts, test blanket modules and ELM control coils (ECCs) with the ASCOT code. The ECCs are found to stochastize the magnetic field deep inside the pedestal in the 15MA inductive reference operating scenario. Such a field is found insufficient to confine not only the fast but also the thermal ion population, leading to a strongly reduced fast ion source in the edge. Therefore, even with a stochastic edge, no high fast ion power loads are expected. However, the plasma response has not yet been included in the calculation of ITER magnetic background data, and it is probable that the perturbation is currently overestimated.

UR - http://www.scopus.com/inward/record.url?scp=84866479375&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/54/10/105008

DO - 10.1088/0741-3335/54/10/105008

M3 - Article

VL - 54

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

SN - 0741-3335

IS - 10

M1 - 105008

ER -

ID: 15876994