Speaker
Jean-François Artaud
Description
See the full Abstract at http://ocs.ciemat.es/EPS2018ABS/pdf/P1.1074.pdf
Validation of modelling of JT-60SA tokamak scenarios with METIS code
J-F Artaud1, J. Garcia1, G. Giruzzi1, F. Imbeaux1
1
CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France.
The integrated modeling code METIS [1] is a faster than real-time scenario simulation suite
which can be applied to a significant variety of plasma modelling activities due to its
comprehensive list of physical models. It allows analyses of current diffusion and heat and
particle transport and sources including W.
Recently, in the framework of the construction of JT-60SA, it has been adapted for JT-60SA
scenario preparation and development. We have used METIS to optimize the scenario
development of JT-60SA [2] especially during the ramp-up phase, with the aim of saving
flux consumption, which is a key point to achieve longer duration discharges (the available
poloidal flux is limited due to the maximum current allowed in central solenoid coils) [3,4].
We present here the activity of validation and some studies of scenario optimization
developed for JT-60SA.
The activity of validation has consisted, firstly, in a benchmark of METIS results against
CRONOS simulations of JT-60SA scenario based on models tuned on JET and JT-60U
experiments [5]. For this benchmark, METIS parametrisation has been kept as close as
possible to that used for JT-60SA scenario development. Results display a good agreement
between METIS and CRONOS (the much more sophisticated modelling suite), although
some discrepancies appear for high beta scenarios. The second part of the validation has
consisted of studies of the capability of METIS to simulate ramp-up of selected JET
experiments. This study allowed highlighting the capacity of METIS to simulate the ramp-up
of a device with similar size to JT-60SA. Comparisons between METIS predictions and
experiments show good agreement, even if some limitations appear. Differences appear, in
particular, in kinetic profile predictions.
This work has been carried out within the framework of the EUROfusion Consortium and has received funding
from the EURATOM research and training programme 2014-2018 under grant agreement No 633053. The
views and opinions expressed herein do not necessarily reflect those of the European Commission. The authors
gratefully acknowledge members of the JT-60SA Integrated Project Team for data exchange and fruitful
discussions.
[1] METIS: A FAST INTEGRATED TOKAMAK MODELLING TOOL FOR SCENARIO DESIGN, J-F
Artaud et al, submitted to Nuclear Fusion
[2] JT-60SA Research Plan, Research Objectives and Strategy, Version 3.3, 2016, March: JT-60SA Research
Unit (http://www.jt60sa.org/pdfs/JT-60SA_Res_Plan.pdf)
[3] H. Urano et al, Fusion Engineering and Design 100 (2015) 345–356
[4] T Wakatsuki et al, Plasma Phys. Control. Fusion 57 (2015) 065005 (12pp)
[5] J. Garcia et al, Nucl. Fusion 54 (2014) 093010
