Magnetic field measurements in plasma of multiwire array at the ANGARA-5–1 facility

Summary form only given. This work presents an improved probe technique for measuring magnetic fields inside the imploding liner, designed at the Angara-5-1. The design of miniature probes and way of their positioning have simplified installation of given diagnostic technique in small volume of imploding liners. Positioning accuracy of magnetic probes in radius and on angle was about 0.5 mm. The new probe design has allowed using in each experiment more points of a magnetic field measurement (from 6 to 9 points). Results are presented from experimental studies of the implosion of wire (tungsten, aluminum, and molybdenum) and fiber (kapron) arrays at the Angara-5-1 facility at currents of up to 4 MA and a SXR power of up to 3 TW. The radial distributions of the azimuthal magnetic field in the stage of plasma production in such arrays are measured in detail for the first time, and the radial profiles of the current density are evaluated. The data obtained using an optical streak camera are compared with the results of measurements of the current and voltage. Using the obtained experimental results, the rate of plasma production in the arrays made of different materials is estimated. Qualitative comparison of the experimental probe signals with data of a 1-D MHD-simulation has been made.