Conductivity measurement of an expanding plasma cloud generated by hypervelocity impact LY12 aluminum target

To study conductivity of an expanding plasma cloud generated during hypervelocity impact, a scanning electrical probe diagnostic system suitable for transient plasma conductivity measurement is designed. Spherical projectile of LY12 aluminum is loaded by two-stage light-gas gun, the scanning electrical probe diagnostic system was used to measure plasma conductivity, which was generated by hypervelocity impact at different impact velocities or the same angles. The relationship between the plasma conductivity generated during the whole physical process at the positions of probes and the time was obtained by analyzing the equivalent circuit. Experimental results show that the conductivity depends on impact velocity and at the same impact angle and the sensor layout, the expanding plasma cloud