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Numerical simulation of the compressor coil of the plasma dynamic accelerator

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1 Author(s)
Thomas, P. ; Tech. Univ. Munchen, Germany

The plasma dynamic accelerator accelerates a plasma to very high velocities in a coaxial accelerator and then compresses it in a compressor coil, achieving high densities. The axial component of the current distribution, extending from the tip of the coaxial accelerator's center electrode to the coil turns, causes compressing forces, the radial component yields accelerating forces. The rapid change of the coil current induces azimuthal eddy currents in the plasma that interact with the coil's magnetic field, again yielding Lorentz forces. Aerodynamic compression may also be an important effect. A new two-dimensional magnetohydrodynamics code is used to investigate which of these effects are really important for the compression. The code allows us to simulate all effects mentioned separately and in combination. In a first step only aerodynamic compression is considered. Then each electromagnetic effect is imposed on the system. Finally, a complete simulation of the compressor coil is performed. The analysis of the results provides new in-sights in the way the coil operates. This paper presents important aspects of the mathematical model and of the numerical implementation and reports results

Published in:

Magnetics, IEEE Transactions on  (Volume:33 ,  Issue: 1 )