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Production of high dynamic pressure using a strong shock wave is a topic ofhigh relevance for high energy density physics, inertial confinement fusion andmaterials science. Although the pressures in the multi-megabar range can beproduced by the shocks generated with a large variety of methods, the higherpressures, in the sub-gigabar or gigabar range, are achievable only withnuclear explosions or laser-driven shocks. However, the laser-to-shock energyconversion efficiency in the laser-based methods currently applied is low and,as a result, multi-kilojoule multi-beam lasers have to be used to produce suchextremely high pressures. In this paper, the generation of high-pressure shocksin the newly proposed collider in which the projectile impacting a solid targetis driven by the laser-induced cavity pressure acceleration (LICPA) mechanismis investigated using two-dimensional hydrodynamic simulations. A specialattention is paid to the dependence of shock parameters and the laser-to-shockenergy conversion efficiency on the impacted target material and the laserdriver energy. It has been found that both in case of low-density andhigh-density solid targets the shock pressures in the sub-gigabar range can beproduced in the LICPA-based collider with the laser energy of only a fewhundred of joules, and the laser-to-shock energy conversion efficiency canreach values of 10 to 20 percent, by an order of magnitude higher than theconversion efficiencies achieved with other laser-based methods used so far.

Production of sub-gigabar pressures by a hyper-velocity impact in the collider using laser-induced cavity pressure acceleration