Multiply charged ion spectra of a laser plasma produced on both sides of the target

Multiply charged ion spectra in plasmas produced on both sides of Al and W targets by laser radiation with an intensity of 0.1 – 500 GW cm^-2 were investigated simultaneously. The charge-state and energy ion spectra of the laser plasmas were studied on both sides of the target with the aid of a double-channel mass spectrometer. The maximum ion multiplicity and energy on the rear side of the target were found to lower relative to the front side owing to a variation in the ionisation kinetics in the plasma.