Speaker
Fabien Jaulmes
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P5.1023.pdf
Particles simulations of RMP fields effects in the COMPASS tokamak
F. Jaulmes1, S.Y.F. Cats2, T. Markovic1, E. Westerhof2, H.J. de Blank2, J. Urban1, and the
COMPASS team
1
Institute of Plasma Physics of the CAS, Prague, Czech Republic
2
FOM-DIFFER Dutch Institute For Fundamental Energy Research, Eindhoven, The
Netherlands
The use of Resonant Magnetic Perturbation (RMP) coils has extensively been demonstrated
as an experimental technique for mitigating or suppressing large edge localized modes
(ELMs) in a number of tokamaks. In this work, we introduce a newly developed extension
of the EBdyna_go code (introduced in [1]) that was designed to resolve the full-orbit of
charged particles, in a collisionless manner. The new version of the code allows to study
motions in the 3D perturbed fields generated by RMPs.
The model has been applied on the COMPASS tokamak, comparing it with its extensive
RMP campaign experimental database [2]. We took advantage of the diagnostics of the
tokamak in order to assess the experimental effect of the RMP on the overall edge plasma
conditions (density, temperature, current and rotation) and on the ELM activity.
Detailed integrated transport modelling with the METIS code [3] has been used so that the
latest experimental data can be wrapped up by self-consistent simulations and the pedestal
data can be used in the RMP modelling described in this contribution.
Our analysis focuses on comparing the effect on the particle transport and losses of the
vacuum solution (using a Biot-Savart solver) and of a more elaborate solution that includes
the plasma response to the perturbed field, calculated with the resistive MHD code MARS-
F [4]. We present insights on the effect of the RMPs on the induced change on the pedestal
momentum, the pedestal temperature as well as the impurity content in the edge region.
[1] - Jaulmes F., Westerhof E. and de Blank H.J. 2014 Nucl. Fusion 54 104013
[2] - Markovic T. et al 2016 Nucl. Fusion 56 092010
[3] - Artaud J.F. et al. 2010 Nucl. Fusion 50, 043001
[4] – Liu Y., et al. 2000 Phys. Plasmas 7, 3681
