Numerical simulations of Z-pinch experiments to create supersonic differentially-rotating plasma flows |
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Authors: | Matteo Bocchi Jerry P Chittenden Sergey V Lebedev Gareth N Hall Matthew Bennett Adam Frank Eric G Blackman |
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Institution: | 1. Plasma Physics, Imperial College, Blackett Laboratory, Prince Consort Road, SW7 2BW London, UK;2. Department of Physics and Astronomy, University of Rochester, Rochester, NY 14627-0171, USA |
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Abstract: | The aim of this work is to produce and study a high energy density laboratory plasma relevant to astrophysical accretion disks. To this end, an experimental setup based on a modified cylindrical wire array was devised, which employs a cusp magnetic field to introduce angular momentum into the system. The setup was studied numerically with the three-dimensional, resistive magneto-hydrodynamic code GORGON. Simulations show that a differentially-rotating flow is formed, with typical rotation velocity and Mach number values of 60 km/s and Mφ ~ 5 respectively. The plasma is radiatively cooled and presents a Reynolds number higher than 107. In addition, the magnetic Reynolds number and the plasma β are >1. Such a plasma is of interest for the study of hydrodynamic and magneto-hydrodynamic instabilities, and turbulence generation in differentially-rotating plasma flows. |
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