Radiative Signatures of the Relativistic Kelvin-Helmholtz Instability


Radiative Signatures of the Relativistic Kelvin-Helmholtz Instability

Bussmann, M.; Burau, H.; Cowan, T. E.; Debus, A.; Huebl, A.; Juckeland, G.; Kluge, T.; Nagel, W. E.; Pausch, R.; Schmitt, F.; Schramm, U.; Schuchart, J.; Widera, R.

We present a particle-in-cell simulation of the relativistic Kelvin-Helmholtz Instability (KHI) that for the first time delivers angularly resolved radiation spectra of the particle dynamics during the formation of the KHI. This enables studying the formation of the KHI with unprecedented spatial, angular and spectral resolution. Our results are of great importance for understanding astrophysical jet formation and comparable plasma phenomena by relating the particle motion observed in the KHI to its radiation signature. The innovative methods presented here on the implementation of the particle-in-cell algorithm on graphic processing units can be directly adapted to any many-core parallelization of the particle-mesh method. With these methods we see a peak performance of 7.176 PFLOP/s (double-precision) plus 1.449 PFLOP/s (single-precision), an efficiency of 96% when weakly scaling from 1 to 18432 nodes, an efficiency of 68.92% and a speed up of 794 (ideal: 1152) when strongly scaling from 16 to 18432 nodes.

Keywords: picongpu; titan; ornl; kelvin-helmholtz-instability; khi; pflop; gpu; simulation; plasma; performance; gordon bell prize

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  • Invited lecture (Conferences)
    SC'13, The International Conference for High Performance Computing, Networking, Storage and Analysis, 17.-22.11.2013, Denver, CO, United States of America
  • Open Access Logo Contribution to proceedings
    SC13: International Conference for High Performance Computing, Networking, Storage and Analysis, 17.-22.11.2013, Denver, CO, United States of America
    Proceedings of SC13, New York, NY, USA: ACM, 978-1-4503-2378-9, 5-1
    DOI: 10.1145/2503210.2504564
    Cited 76 times in Scopus

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Publ.-Id: 19367