Cold start effects in experiments with plasma liner implosion at the Angara-5-1 facility

The cold start effects by current implosion up to 4 MA of plasma liners, prepared by the current itself from micro-heterogeneous (foam) and uniform (gas) plasma-produced substance is studied. It is shown that by the fast current growth necessary for effective acceleration of ∼ 100 mkg/cm of plasma ∼ up to 5 x 107 cm/s on the base ∼ 1 cm, the plasma production in the initially cold liner substance does not succeed to get completed by the moment, when the effect of magnetic forces becomes important. Processes of the structure conversion of the plasma heterogeneities via transfer from the plasma production stage to the plasma acceleration liner stage are analyzed. The effect of breaking through the near-cathode azimuthal magnetic flux into the implosive liner is considered. The carry-away of the low-density plasma produced from the solid-state foam by the magnetic forces at the current phase rise is detected