HPC and Plasma SimulationsCANCELLED

PLEASE NOTICE: THIS SEMINAR HAD TO BE CANCELLED

The energy crisis in the HPC data center business has been predicted about 2 decades ago and recently worsened due to increasing energy prices. Since many  scientific projects depend heavily on computation it becomes urgent to optimize numerical codes for better use of limited HPC resources. This applies in particular to Computational Fluid Dynamics and kinetic plasma simulation, two main consumers of computational resources offered by the HPC cluster HEMERA at HZDR. In my talk, I will briefly review some numerical approaches that can potentially reduce the computational complexity of plasma and CFD codes. As an example  I will describe  simulation details from our recent study on  the maximum proton energy scaling. The experiment has been carried out at the POLARIS laser (GSI, Jena). For high-intensity laser-solid interactions, the density and density gradients of the target upon arrival of the relativistic laser peak are critical parameters. Due to the different time scales, the formation of the pre-plasma and the interaction with the main pulse has to be performed with a composite approach with combined hydrodynamic and kinetic simulation. These codes were specifically designed to perform extensive parameter scans pre-plasma parameters. To speedup code development a new Openstack Cloud service has been used to  mimic real HPC cluster and therefore reduce  the energy-to-solution metrics of simulations.