EXPERIMENTS ON THE INTERACTION OF HEAVY-ION BEAMS WITH DENSE-PLASMAS

Gas discharge plasma targets were used for energy loss and charge stat e measurements of fast heavy ions 5 MeV/u less than or equal to E(kin) less than or equal to 10 MeV/u in a regime of electron density and te mperature up to 10(19) cm(-3) and 20 eV respectively. Progress has bee n achieved in the understanding of charge exchange processes in fully ionized hydrogen plasma. An improved model that has taken excitation-a utoionization processes into account has removed some of the discrepan cies of previous theoretical descriptions. Furthermore, the energy los s of the ion beam serves as an excellent diagnostic tool for measuring the electron density in partially ionized plasmas such as argon. The experience with these methods will be used in the future to diagnose d ense laser-produced plasmas. A setup with a 5-GW neodymium-glass laser currently under construction, will provide access to density ranges u p to 10(21) cm(-3) and temperatures > 100 eV.