Physics – Plasma Physics
Scientific paper
2011-03-10
Physics
Plasma Physics
Accepted for publication in Astrophysics & Space Science. HEDLA 2010 conference procedings. Final pubblication will be availab
Scientific paper
The aim of this work is to model the jets produced by conical wire arrays on the MAGPIE generator, and to design and test new setups to strengthen the link between laboratory and astrophysical jets. We performed the modelling with direct three-dimensional magneto-hydro-dynamic numerical simulations using the code GORGON. We applied our code to the typical MAGPIE setup and we successfully reproduced the experiments. We found that a minimum resolution of approximately 100 is required to retrieve the unstable character of the jet. We investigated the effect of changing the number of wires and found that arrays with less wires produce more unstable jets, and that this effect has magnetic origin. Finally, we studied the behaviour of the conical array together with a conical shield on top of it to reduce the presence of unwanted low density plasma flows. The resulting jet is shorter and less dense.
Bocchi Matteo
Bott Simon C.
Chittenden Jeremy P.
Ciardi Andrea
Grouchy P. de
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