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Title: Extreme Scale Computing for First-Principles Plasma Physics Research

World superpowers are in the middle of the “Computnik” race. US Department of Energy (and National Nuclear Security Administration) wishes to launch exascale computer systems into the scientific (and more »national security) world by 2018. The objective is to solve important scientific problems and to predict the outcomes using the most fundamental scientific laws, which would not be possible otherwise. Being chosen into the next “frontier” group can be of great benefit to a scientific discipline. An extreme scale computer system requires different types of algorithms and programming philosophy from those we have been accustomed to. Only a handful of scientific codes are blessed to be capable of scalable usage of today’s largest computers in operation at petascale (using more than 100,000 cores concurrently). Fortunately, a few magnetic fusion codes are competing well in this race using the “first principles” gyrokinetic equations.These codes are beginning to study the fusion plasma dynamics in full-scale realistic diverted device geometry in natural nonlinear multiscale, including the large scale neoclassical and small scale turbulence physics, but excluding some ultra fast dynamics. In this talk, most of the above mentioned topics will be introduced at executive level. Representative properties of the extreme scale computers, modern programming exercises to take advantage of them, and different philosophies in the data flows and analyses will be presented. Examples of the multi-scale multi-physics scientific discoveries made possible by solving the gyrokinetic equations on extreme scale computers will be described. Future directions into “virtual tokamak experiments” will also be discussed.« less
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Title: Extreme Scale Computing for First-Principles Plasma Physics Research
Authors:
Publication Date: 2011-10-12
OSTI Identifier: 1043244
Resource Type: Multimedia
Resource Relation: Conference: Wednesday Colloquium Series, Princeton Plasma Physics Laboratory, Princeton, New Jersey, presented on October 12, 2011
Research Org: PPPL (Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States))
Sponsoring Org: USDOE Office of Science (SC)
Subject: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Country of Publication: United States
Language: English
Run Time:
System Entry Date: 2016-06-27