Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session YO07: Space/Heliospheric Plasmas
9:30 AM–12:30 PM,
Friday, October 21, 2022
Room: 401 ABC
Chair: Arya Afshari, University of Iowa
Abstract: YO07.00003 : Simulating Starfish: Numerical Investigation of the Starfish HANE EMP and Diamagnetic Cavity Evolution with Comparison to Observational Data*
9:54 AM–10:06 AM
Presenter:
Mikhail Belyaev
(Lawrence Livermore National Laboratory)
Author:
Mikhail Belyaev
(Lawrence Livermore National Laboratory)
Collaboration:
M. A. Belyaev, D. J. Larson, B. I. Cohen, V. Arnold, C. Chen, S. E. Clark, B. A. Kirkendall, H. Le
We present kinetic simulations of Starfish Prime, using our spherical hybrid PIC code Topanga. Key features of Topanga include: prompt X-ray ionization; atmospheric and debris ions modeled as individual species; a chemistry reaction network; a hydrodynamic solver; neutral-ion coupling; and an FDTD Maxwell solver that propagates electromagnetic fields in the presence of a tensor conductivity.
Our global simulations cover a 60x60 degree patch in latitude and longitude that spans an altitude range of 0-2000 km above the surface of the Earth. The simulation domain encloses the HANE blast bubble and X-ray ionization patch. We find that the E3a signal is due to ionospheric waves that propagate around the ionization patch, which is a novel result. We also find good agreement for both the E3 signal and diamagnetic cavity evolution compared with observations (Dyal 2006).
*This work conducted under the auspices of the U.S. Department of Energy by LLNL under Contract DE-AC52-07NA27344.
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