Basic technology of fast growing for normal and partially deuterated KDP crystals

The distribution coefficient of deuterium in the crystal depends on that of the growth solution. It was not affected, even if the saturated temperature and the supersaturation of the growth solution were changed. Thirteen percent-deuterated KDP crystal of 9 by 9 by 11 cm size was grown in which the deuterated rate was constant within the measurement error of plus or minus 1%. The excess energy due to an over heating and/or an acoustic energy to the solution and the pH control realized a higher level of supersaturation. KDP crystals were grown up to 50 mm/day.