Measurement of magnetic fields in a high-current Z pinch in Angara-5-1 using Faraday rotation

Faraday rotation is used to study the magnetic-field structure in the plasma of a high-current Z pinch. It is shown that most of the discharge current, amounting to 3 MA, flows in an axial region of the pinch with diameter ∼6 mm. The magnetic-field profile implies that a distance of 3-4 mm from the axis there are local peripheral induced currents of 0.3-0.5 MA around the main pinch, flowing in the reverse direction. The maximum mean magnetic-field strength localized near the peripheral currents is equal to ∼5.6 MG. 15 refs., 4 figs