The interaction was observed between a supersonic free jet of partially ionized argon and the magnetic field of a coil concentric with the jet. Nominal values of the parameters were;Mach number, 3;Reynolds number, 1000;magnetic Reynolds number, 0.2;magnetic interaction parameter, 1;Hall parameter, 1. The jet was strongly channelled. Axial and radial electric fields were observed in the jet with a net rise in potential across the interaction.
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