Salo V. Scientific and technological basis of the rapid growth of the large-scale single KDP crystals from the water solutions.

Scientific and technical problem of the growth of single KDP/DKDP crystals has been investigated. The way has been passed from the development of the technology of synthesis of high quality raw material; creation of construction and production of original crystallization equipment; determination of efficient hydrodynamic conditions of inflow of big size single crystals in the process of their monosectorial growth; establishment of the influence of the complex of the technological factors on the process of stable rapid growth, optical homogeneity and laser damage threshold of the crystals; determination of conditions of the crystal growth in the direction of the prescribed angle of synchronism that allows to increase the coefficient of the material usage from 10% to 90% while producing wide-aperture laser elements; development of the method of thermal treatment of the medium quality crystals increasing the laser damage threshold; till production of the wide-aperture frequency multipliers into the secondand the third harmonics of laser emission. As a result the technology of the rapid (till 10mm/day) growth of the big size (40x40 sm2) single KDP crystals at the temperature of 70-80°C for the usage in megajoule laser systems has been developed and applied in industry.