Abstract
A concept and a laboratory model of the laser-driven accelerator of plasma beams for materials research is presented. The accelerator is based on the laser-induced cavity pressure acceleration (LICPA) scheme and enables us to control the plasma beam parameters and change values of these parameters within a few orders of magnitude. It is predicted that the accelerator employing a commercial nanosecond laser of energy ∼3J would be capable of producing a plasma beam of controlled composition and the beam fluence up to 200J/cm2, the beam peak intensity up to 10GW/cm2 and the beam duration within the 20ns–10μs range. A laboratory model of the accelerator with a 0.5J/4ns Nd:YAG laser driver was built and tested. A CH plasma beam of the fluence >10J/cm2 and the peak intensity >100MW/cm2 at the accelerator channel outlet was produced with the laser-to-beam energy conversion efficiency approaching 15%. A strong surface damage of various metal samples by the beam was observed.The proposed accelerator is a novel tool for materials research which seems to be particularly useful for testing materials proposed for future fusion reactors both the MCF and ICF ones.
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