Hybrid Simulation of Collisionless Shock Formation in Support of Laboratory Experiments at Unr |
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Authors: | V I Sotnikov H Ruhl R Presura T Cowan J N Leboeuf P Hellinger P Travnicek |
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Institution: | (1) UNR, Department of Physics, Reno, NV;(2) UCLA, Department of Physics, Los Angeles, CA;(3) IAP, Prague 4, Czech Republic |
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Abstract: | The problem of producing collisionless shocks in the laboratory is of great interest for space and astrophysical plasmas.
One approach is based on the idea of combining strong magnetic field (up to 100 Tesla) created during a Z-pinch discharge
with a plasma flow produced in the process of the interaction of a laser pulse with a solid target. In support of laboratory
experiments we present hybrid simulations of the interaction of the plasma flow with frozen in it magnetic field, with the
spherical obstacle. Parameters of the flow correspond to a laser plasma ablation produced in the laboratory during irradiation
of the target by a 3 J laser. Magnetic fields in the plasma flow and around the obstacle are created by the currents produced
by the pulse power ZEBRA voltage generator. With the appropriate set of initial conditions imposed on the flow collisionless
shocks can be created in such a system. Using independent generators for plasma flow and magnetic field allows for the exploration
of a wide range of shock parameters. We present simulations of the formation of supercritical collisionless shock relevant
to the experiment, performed with the 2D version of the hybrid code based on the CAM-CL algorithm Planet. Space Sci. 51,
649, 2003]. |
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Keywords: | collisionless shock laser plasma ablation hybrid code |
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