The ITER Integrated Modelling & Analysis Suite (IMAS) will support both plasma operation and research activities on the ITER tokamak experiment. The IMAS will be accessible to all ITER members as a key tool for the scientific exploitation of ITER. The backbone of the IMAS infrastructure is a standardized, machine-generic data model that represents simulated and experimental data with identical structures. The other outcomes of the IMAS design and prototyping phase are a set of tools to access data and design integrated modelling workflows, as well as first plasma simulators workflows and components implemented with various degrees of modularity.
Abstract.A selection of achievements and first physics results are presented of the European Integrated Tokamak Modelling Task Force (EFDA ITM-TF) simulation framework, which aims to provide a standardized platform and an integrated modelling suite of validated numerical codes for the simulation and prediction of a complete plasma discharge of an arbitrary tokamak. The framework developed by the ITM-TF, based on a generic data structure including both simulated and experimental data, allows for the development of sophisticated integrated simulations (workflows) for physics application. The equilibrium reconstruction and linear MHD stability simulation chain was applied, in particular, to the analysis of the edge MHD stability of ASDEX Upgrade type-I ELMy Hmode discharges and ITER hybrid scenario, demonstrating the stabilizing effect of an increased Shafranov shift on edge modes. Interpretive simulations of a JET hybrid discharge were performed with two electromagnetic turbulence codes within ITM infrastructure showing the signature of trapped-electron assisted ITG turbulence. A successful benchmark among five EC beam/ray-tracing codes was performed in the ITM framework for an ITER inductive scenario for different launching conditions from the Equatorial and Upper Launcher, showing good agreement of the computed * See the Appendix.
The new European HPC facility for Fusion is in operation since July 2016. It replaces, for European fusion researchers, the Helios supercomputer installed in Japan in the context of the Broader Approach agreement. The supercomputer is hosted at CINECA and it is a fraction of the MARCONI system. Thanks to a customized technical project done by ENEA, in a joint development agreement with CINECA, the European community of fusion modelling can exploit the latest available CPU technologies, following the CINECA HPC roadmap towards 50 PFlops planned for 2019. The MARCONI Fusion fraction is being delivered in two phases: the first one, 1 PFlops of CPU multi-core architecture based on the Intel Broadwell processors, is already in operation since July 2016, and the second one, 5 PFlops of the same architecture based on the INTEL Skylake processors, will be deployed in July 2017. Furthermore the project includes 1 PFlops of the third generation of Intel Xeon Phi many-core architecture (Knights Landing generation). Within this framework, ENEA/CINECA provides, in addition, the operation support of the Gateway infrastructure of EUROFusion Work-Package Code Development. A new Gateway HPC system is in operation at CINECA since Jan. 2017 thanks to the data migration and software porting activities carried out by ENEA/CINECA team together with the Core Programming Team of the Infrastructure and Support Activity work package from EUROfusion. The new Gateway infrastructure is tightly coupled with the MARCONI Fusion fraction, sharing the same 100 Gbps low-latency network based on the Intel OmniPath technology. The paper describes the technical details and the performances of MARCONI, one of the largest HPC OmniPath based infrastructure.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.