Three-dimensional modeling of plasma edge transport and divertor fluxes during application of resonant magnetic perturbations on ITER

0460360 - ÚFP 2017 RIV AT eng J - Článek v odborném periodiku
Schmitz, O. - Becoulet, M. - Cahyna, Pavel - Evans, T.E. - Feng, Y. - Frerichs, H. - Loarte, A. - Pitts, R.A. - Reiser, D. - Fenstermacher, M.E. - Harting, D. - Kirschner, A. - Kukushkin, A. - Lunt, T. - Saibene, G. - Reiter, D. - Samm, U. - Wiesen, S.
Three-dimensional modeling of plasma edge transport and divertor fluxes during application of resonant magnetic perturbations on ITER.
Nuclear Fusion. Roč. 56, č. 6 (2016), č. článku 066008. ISSN 0029-5515. E-ISSN 1741-4326
Institucionální podpora: RVO:61389021
Klíčová slova: resonant magnetic perturbations * plasma edge physics * 3D modeling * neutral particle physics * ITER * divertor heat and particle loads * ELM control
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 3.307, rok: 2016
http://iopscience.iop.org/article/10.1088/0029-5515/56/6/066008/meta

Results from three-dimensional modeling of plasma edge transport and plasma–wall
interactions during application of resonant magnetic perturbation (RMP) fields for control of
edge-localized modes in the ITER standard 15 MA Q = 10 H-mode are presented. The full
3D plasma fluid and kinetic neutral transport code EMC3-EIRENE is used for the modeling.
Four characteristic perturbed magnetic topologies are considered and discussed with reference
to the axisymmetric case without RMP fields. Two perturbation field amplitudes at full and
half of the ITER ELM control coil current capability using the vacuum approximation are
compared to a case including a strongly screening plasma response. In addition, a vacuum
field case at high q95 = 4.2 featuring increased magnetic shear has been modeled.
Formation of a three-dimensional plasma boundary is seen for all four perturbed magnetic
topologies. The resonant field amplitudes and the effective radial magnetic field at the separatrix
define the shape and extension of the 3D plasma boundary. Opening of the magnetic field lines
from inside the separatrix establishes scrape-off layer-like channels of direct parallel particle
and heat flux towards the divertor yielding a reduction of the main plasma thermal and particle
confinement.This impact on confinement is most accentuated at full RMP current and is strongly
reduced when screened RMP fields are considered, as well as for the reduced coil current cases.
Trvalý link: http://hdl.handle.net/11104/0260455