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UID:submissions.pasc-conference.org_PASC24_sess117_msa190@linklings.com
SUMMARY:Towards Exascale Full Kinetic Modelling of the Tokamak Scrape-Off 
 Layer
DESCRIPTION:Minisymposium\n\nDavid Tskhakaya (Institute of Plasma Physics 
 of the Czech Academy of Sciences), Jeremy Williams (KTH Royal Institute of
  Technology), Stefan Costea (University of Ljubljana), Stefano Markidis (K
 TH Royal Institute of Technology), Alejandro Soba (Barcelona Supercomputin
 g Center), Leon Kos (University of Ljubljana), and Anibal Moreno (SiPearl 
 company)\n\nIn this work we describe a fully kinetic PIC MC (Particle in C
 ell Monte Carlo) code, BIT1, used for the simulation of plasma, neutral, a
 nd impurity particle transport in the tokamak edge [2]. BIT1 has several u
 nique features enabling near ab-initio modeling of nonlinear processes in 
 the plasma edge: it can resolve the smallest time and space scales and sti
 ll simulate large systems, such as the tokamak Scrape-off Layer (SOL) and 
 can track very slow and fast particles with high accuracy, Vmax/Vmin > 100
 0 and so on. As an example, we present several recent results obtained fro
 m BIT1 simulation of the plasma edge of existing and future tokamaks.\nTo 
 address the main drawback of such modeling, which has extremely long simul
 ation times, such as the ITER SOL BIT1 simulation requiring up to 10 milli
 on CPU hours, equivalent to half a year of simulation time under realistic
  conditions, we initiate the development of an exascale version of the BIT
 1 under the Horizon project Plasma-PEPSC [3]. Furthermore, we outline the 
 BIT1 exascale porting process, which includes algorithmic restructuring, G
 PU porting, and implementation of highly scalable parallel I/O using openP
 MD. \n[1] https://www.iter.org/ \n[2] D. Tskhakaya, Plasma Phys. Control. 
 Fusion, 59, (2017)\n[3] https://plasma-pepsc.eu/\n\nDomain: Physics, Compu
 tational Methods and Applied Mathematics\n\nSession Chairs: Stephan Brunne
 r (EPFL); Eric Sonnendrücker (Max Planck Institute for Plasma Physics, Tec
 hnical University of Munich); and Laurent Villard (EPFL)
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