Laboratory experiments and simulations on jets

Details Laboratory experiments and simulations on jets Laboratory experiments and simulations on jets

2011-11-17

arxiv.org/abs/1111.4223v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

7 pages, 5 figures, to appear in the proceedings of the "Magnetic Fields in the Universe III" meeting, Zakopane, PL

Scientific paper

Astrophysical jets have been studied with observations, theoretical models and numerical simulations for decades. Recently, supersonic magnetized jets have been formed in laboratory experiments of high-energy density plasmas. I will review these studies and discuss the experimental setup that has been used to form millimeter-scale jets driven by strong toroidal magnetic fields in a MAGPIE generator. The physical conditions of these experiments are such that they can be scaled to astrophysical scenarios. These laboratory jets provide insights on the underlying physics of magnetic tower jets and help constrain some models of astrophysical jets. In this context, we also discuss the connection between the laboratory jets and recent 3D-MHD numerical simulations of Poynting flux dominated jets. The simulations allow us to investigate the effects of thermal energy losses and base rotation on the growth rate of kink mode perturbations, and to compare the evolution of PFD jets with a hydrodynamic counterpart of the same energy flux.

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