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Optimizing the flow conditions of the horizontally oriented DKDP crystal by adding a stirring paddle
Author(s): Duanyang Chen; Bin Wang; Hongji Qi; Jianda Shao; Kaiwei Hu; Lili Zheng; Hui Zhang
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Paper Abstract

By eliminating one prismatic face and adding four second pyramid faces, the horizontally oriented DKDP crystal can improve the cutting efficiency for tripler in ICF. To optimize the flow conditions for the growth of the horizontally oriented DKDP crystal, a stirring paddle is add above the crystal in the growth tank. With different rotation direction, position and size of the stirring paddle, the distributions of shear force on the crystal surface are compared by using numerical simulations. But the shear stress at center of the up face of the crystal is too small to ensure high quality crystal. However, the numerical simulation results do provide the understanding and guidance for the growth of large size DKDP crystals that can increase cutting efficiency of tripler. Currently, a cuboid DKDP crystal without a pyramidal sector was rapidly grown in SIOM. The higher the cuboid DKDP crystal, the cutting yield is more efficient for the tripler. And the aperture of the biggest triplers is approximately equal to the cross-section of the cuboid DKDP crystal. The fluence corresponding to 50% laser-induced damage (LID) probability of the cuboid DKDP crystal was 13.4 J/cm2. The crystal grown using this method establishes the possibility of growing large cuboid DKDP crystals. Currently, rapid growth of cuboid DKDP crystals of more than 40 cm is underway.

Paper Details

Date Published: 8 July 2019
PDF: 7 pages
Proc. SPIE 11063, Pacific Rim Laser Damage 2019: Optical Materials for High-Power Lasers, 1106308 (8 July 2019); doi: 10.1117/12.2539928
Show Author Affiliations
Duanyang Chen, Shanghai Institute of Optics and Fine Mechanics (China)
Univ. of Chinese Academy of Sciences (China)
Bin Wang, Shanghai Institute of Optics and Fine Mechanics (China)
Hongji Qi, Shanghai Institute of Optics and Fine Mechanics (China)
Jianda Shao, Shanghai Institute of Optics and Fine Mechanics (China)
Kaiwei Hu, Tsinghua Univ. (China)
Lili Zheng, Tsinghua Univ. (China)
Hui Zhang, Tsinghua Univ. (China)


Published in SPIE Proceedings Vol. 11063:
Pacific Rim Laser Damage 2019: Optical Materials for High-Power Lasers
Jianda Shao; Takahisa Jitsuno; Wolfgang Rudolph, Editor(s)

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