Investigation of energy and current concentration in composite Z-pinch through it´s soft X-Ray emission on Angara-5-1

Z-pinch of thin dense fiber with gas shell (Composite pinch) was investigated at level of current ∼2–3MA on “Angara-5-1” generator. High efficiency of generator power transfer into the pinch of 0.6–1 mm diameter was achieved when masses of gas and wire was comparable (20–40µg/cm). At time of increase of a current ∼90 ns powerful (∼0.5–1 TW) pulses of soft X-Ray radiation with font rise time up to 1 ns were obtained. Up to a maximum of a pulse of radiation the current from an external plasma shell penetrates mainly into plasma corona of the fiber. The corona consists of small part of fiber substance which is evaporated by radiation during compression of external shell.