Dynamics of the high-power ion beam interaction with targets

Response of plane targets to the high-power proton beam has been investigated using time-resolved laser Doppler velocimetry with sub-nanosecond temporal resolution. Results of measurements are free-surface velocity profiles of metal foils accelerated by the ablative pressure. An acoustic model was established for a semiquantitative interpretation of the phenomena observed. The evolution in time of the ablation zone has been deduced from performed experiments. Responses of single and double foil targets have been compared to clear up a thermoconductivity contribution into the ablation process.