GPU Multi-Scale Particle Tracking and Multi-Fluid Simulations of the Radiation Belts

Details GPU Multi-Scale Particle Tracking and Multi-Fluid Simulations of the Radiation Belts GPU Multi-Scale Particle Tracking and Multi-Fluid Simulations of the Radiation Belts

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm41a0318z&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM41A-0318

Computer Science

Graphics

2753 Numerical Modeling, 2774 Radiation Belts, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

The properties of the radiation belts can vary dramatically under the influence of magnetic storms and storm-time substorms. The task of understanding and predicting radiation belt properties is made difficult because their properties determined by global processes as well as small-scale wave-particle interactions. A full solution to the problem will require major innovations in technique and computer hardware. The proposed work will demonstrates liked particle tracking codes with new multi-scale/multi-fluid global simulations that provide the first means to include small-scale processes within the global magnetospheric context. A large hurdle to the problem is having sufficient computer hardware that is able to handle the dissipate temporal and spatial scale sizes. A major innovation of the work is that the codes are designed to run of graphics processing units (GPUs). GPUs are intrinsically highly parallelized systems that provide more than an order of magnitude computing speed over a CPU based systems, for little more cost than a high end-workstation. Recent advancements in GPU technologies allow for full IEEE float specifications with performance up to several hundred GFLOPs per GPU and new software architectures have recently become available to ease the transition from graphics based to scientific applications. This allows for a cheap alternative to standard supercomputing methods and should increase the time to discovery. A demonstration of the code pushing more than 500,000 particles faster than real time is presented, and used to provide new insight into radiation belt dynamics.

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