Growth and Defect of DKDP Crystal at Different Supersaturation

During the process of DKDP crystal growth, supersaturation is the dominating factor which greatly influence the growth and quality of DKDP single crystal. In this paper, DKDP crystal was grown from 75%-deuterated solution by the point-seed rapid growth method at different supersaturation. Some specimens of the crystal obtained were tested by synchrotron radiation white beam and XRD. The growth and defects of DKDP crstal at different supersaturation were studied. The results show that DKDP crystal can be grown repidly when the supersaturation is at less than 4℃, and the defects will become more and more with the increase of supersaturation.