Stabilizing of Z-pinch and Plasma Focus discharges due to thick wives

This paper presents the results of the diagnostics observing the impact of the plasma sheath imploded in mega-amper Z-pinch or plasma focus devices on to the Al or C wires of 30-300 mum in diameter fixed in the center axis. Th e discharges were operated with a maximum current of 1.5-3 MA at two device s, PF 1000 at LPFLM in Warsaw, and Stand 300 at RRC Kurchatov Institute in Moscow. At the plasma impact the 10-50 ns XUV pulse was emitted in K-shell lines from the ring or helical-like forms on the surface of the wire corona . The scenario of the production of the non-equilibrium intensities of the C and Al H-like and He-like lines is discussed considering fast transformat ion of magnetic field, electron beams acceleration, total ionization of the ions and fast recombination in dense and magnetized wire corona.