A successful "training meeting" in the Netherlands for physicists involved in EUROfusion's TSVV11 activity   

From 20-24 March, the 2nd annual face-to-face meeting of the TSVV11 (Theory, Simulation, Validation and Verification task on 'Validated frameworks for the Reliable Prediction of Plasma Performance and Operational Limits in Tokamaks) was combined with the 1st training course on the Dutch eScience centre's tools for ‘Uncertainty Quantification'.


Physics driven integrated modelling is carried out in the TSVV11 using the High Fidelity Pulse Simulator (HFPS) on multiple tokamaks (Asdex-Upgrade in Germany, JET, TCV in Swiss, WEST).

One key objective of the TSVV11 is to allow for large scale automated simulations to explore the impact of uncertainties on boundary and initial conditions on the predicted plasma performance (density, temperature, etc).

Thanks to a synergistic project with the NL eScience center, the pipeline for 100s of simulations is now in place.

This meeting joining 2 synergistic projects allowed having 37 persons on-site from the TSVV11 incl. new HFPS users, the NL eScience center, the Ignition Computing start up, the Advanced Computing Hubs of Poland and Finland and from ITER Organization.

The integrated modelling platforms of HFPS, but also of other platforms used throughout Europe (ETS and ASTRA) were represented. Cross fertilization took place on non linear physics encountered in integrated modelling (in the current ramp up modelling of TCV, JET and WEST for example), on physics modules development (Scrape-Off-Layer/pedestal models based on AI, impurity transport, radial electric field, etc) and module/framework numerical settings. 

Training on the automated simulation and analysis pipelines for Uncertainty Quantification and large-scale model validation was provided. It run on 97 JET HFPS simulations during the week. Thanks to an IMAS Data structure interface, it was easily coupled to ETS during the week. Plans were made for physics driven use of this pipeline on WEST and TCV using the HFPS and on Asdex-Upgrade using ETS, including bayesian optimisation schemes with the Advanced Computing Hub based in Finland. 

The 3rd important topic of the meeting was on the workflow evolution of the HFPS towards a multiscale simulation flexible framework, Muscle3. This evolution was also discussed in the context of ETS and ASTRA. Training and support for deployment of Muscle3 took place during the week.


sg165549, 2023-03-30