Experimental results are given on high-power ion beams (HPIB) generation in a vacuumspherical focusing diode with self-magnetic insulation, obtained from the nanosecond accelerator PARUS with 0.2-TW power and 60-ns pulse duration for a matched load. When the passive plasma source of the ions was used, the efficiency of the HPIB generationwas measured to be as high as 20% for 700-kV diode voltage and 10-kA/cm2 beam density in the focal plane.

The application of a coaxial plasma opening switch (POS) prior to the diode resultedin a factor-of-1.8 increase in the diode power in comparison with a match operation inthe absence of a POS.

The experimental results on high-power ion beams (HPIB) generation in a plasma-filled, spherical-focusing diode with self-magnetic insulation that was placed for a load at nanosecond accelerator PARUS of 0.2-TW power and 60-ns pulse duration (in a matched load case) are given. The regimes of plasma-filled diode operation and generation of the ion beam were investigated. For optimal time delay between the plasma gun's pulse and accelerator firing, the stable operation in the plasma opening switch mode with a power enhancement factor of 2.3 and efficiency of ion beam generation of 20–25% was obtained. The maximal value of the ion current density reached in the focal plane was 15 kA/cm2.