CALCULATION OF PARAMETERS FOR HTSC DECOMPOSITION AND VAPORIZATION UNDER LASER-RADIATION

The heat problem for the region with two mobile boundaries is considered with emphasis on the space heat source and the limiting role of mass transfer of oxygen evolved by HTSC decomposition. We describe the ablation mechanism which is due to a sharp increase of the oxygen pressure resulting in the particle removal from of the target surface. The calculations of the ablation threshold and the etching-rate for YBaCuO are in good agreement with experimental results. The theoretical model allows us to explain the laser effect on superconductors and to give recommendations as to the choice of laser regimes for deposition, modification, and polishing of HTSC-films.