Hybrid Simulation of Collisionless Shock Formation in Support of Laboratory Experiments at Unr

Details Hybrid Simulation of Collisionless Shock Formation in Support of Laboratory Experiments at Unr Hybrid Simulation of Collisionless Shock Formation in Support of Laboratory Experiments at Unr

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005ap%26ss.298..369s&link_type=abstract

Astrophysics and Space Science, Volume 298, Issue 1-2, pp. 369-374

Astronomy and Astrophysics

Astrophysics

2

Collisionless Shock, Laser Plasma Ablation, Hybrid Code

Scientific paper

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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