Executive Summary of Project goals

Strategic plan

Our plan is to model these phenomena utilizing a comprehensive first-principles set of equations, eliminating the need for multiple codes and associated coupling issues, by building on the XGC1 code developed under the SciDAC Fusion Simulation Prototype (proto-FSP) Center for Plasma Edge Simulation (CPES). XGC1 has been demonstrated to run realistic problems in complex edge geometry efficiently on up to 223,488 processor cores (the full machine capacity at the time) of the Jaguar XT5 system at the Oak Ridge Leadership Computing Facility. Our work seeks to enhance the capability of XGC1 by including all important turbulence physics contained in kinetic ion and electron electromagnetic dynamics, by extending the Particle-In-Cell (PIC) technology to incorporate several positive features found in the Eulerian (continuum) grid technology, by utilizing the coarse-grained XGC0 code in a multi-scale integration technique to enable experimental timescale simulation of the edge multi-physics, and by implementing modern computational technologies to enable extreme-scale heterogeneous hardware/software platform development. Ultra-fast edge-localized instabilities, involving compressional Alfvén modes, will be studied using a proper MHD or two-fluid code employing kinetic closure information from XGC0 and XGC1. Strong collaboration with ASCR scientists is essential.