For current distributions which circulate about an axis, it is convenient to use cylindrical coordinates, (r, cp, z), letting the circulation be around the z-axis. The magnetic field due to such currents is independent of cp and has no cylindrical component. The magnetic vector potential has only one nonzero component.nThe tables in the report are for an ideal current sheet extending from z = - oo to z = 0 and having a radius p. = 1. An interesting property of such a current sheet is that the axial component of the magnetic field - intensity in the end plane is constant at all points lying inside the radius p of the sheet
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