This work reports on investigations of parameters
of ion streams emitted from a plasma produced with a picosecond
laser at the power densities ≥1016 W/cm2.
Not many papers dealing with such investigations have been
published up to now, in spite of the fact that the application
of precise corpuscular diagnostics enables better learning
of the physical properties of such a plasma. As a result
of the investigations carried out, the average and maximum
energies of Cu ions were 30 keV and 150 keV, respectively.
The maximum charge of Cu ions was 13+. The dependencies
of parameters of ions emitted from the plasma on the laser-pulse
energy as well as on the location of the focus of the laser
beam with respect to the target's surface were also
found out. The results obtained from the ion measurements
in relation to the results of measurements of X ray are