3D Residual Strain in DKDP Crystals by Neutron Diffraction

Liu, Fafu; Sun, Guangai; Cao, Jianwu; Mu, Xiaoming; Guo, Zaizai; Qin, Yuan

doi:10.1002/crat.201900022

Cited by 4 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…DKDP crystals with different deuterium contents were grown by rapid growth method and the three-dimensional (3D) residual strains in single crystals were investigated by neutron diffraction technique 52 , 60 . The magnitude of residual strains ( ε ij ) in crystallographic coordinate was 10 −3 to 10 −4 and the normal strains along [001] direction were always compressive (Table 2 ).…”

Section: Crystal Characterizationmentioning

confidence: 99%

See 1 more Smart Citation

Progress on deuterated potassium dihydrogen phosphate (DKDP) crystals for high power laser system application

Liu

Zhang

et al. 2022

Light Sci Appl

Self Cite

View full text Add to dashboard Cite

In this review, we introduce the progress in the growth of large-aperture DKDP crystals and some aspects of crystal quality including determination of deuterium content, homogeneity of deuterium distribution, residual strains, nonlinear absorption, and laser-induced damage resistance for its application in high power laser system. Large-aperture high-quality DKDP crystal with deuteration level of 70% has been successfully grown by the traditional method, which can fabricate the large single-crystal optics with the size exceeding 400 mm. Neutron diffraction technique is an efficient method to research the deuterium content and 3D residual strains in single crystals. More efforts have been paid in the processes of purity of raw materials, continuous filtration technology, thermal annealing and laser conditioning for increasing the laser-induced damage threshold (LIDT) and these processes enable the currently grown crystals to meet the specifications of the laser system for inertial confinement fusion (ICF), although the laser damage mechanism and laser conditioning mechanism are still not well understood. The advancements on growth of large-aperture high-quality DKDP crystal would support the development of ICF in China.

show abstract

Section: Crystal Characterizationmentioning

confidence: 99%

“…8 The average value of the micro-strain of {323} each faces of experimental sample 60 . Reproduced with permission 60 Copyright, Wiley-VCH …”

Section: Crystal Characterizationmentioning

confidence: 99%

Progress on deuterated potassium dihydrogen phosphate (DKDP) crystals for high power laser system application

Liu

Zhang

et al. 2022

Light Sci Appl

Self Cite

View full text Add to dashboard Cite

show abstract

“…[4,5] Through the analysis of the strain field of the material, researchers can better understand and improve the properties of materials. [6][7][8] With the development of microstructural characterization techniques in recent years, the strain field in the distorted region can be analyzed by various experimental means, such as X-ray diffraction, [9][10][11][12] Raman scattering, [13] electron backscatter-diffraction, [14][15][16][17] neutron diffraction, [18,19] 4D scanning transmission DOI: 10.1002/crat.202100264 electron microscopy, [20] nano-beam electron diffraction, [21] high-resolution transmission electron microcopy and quantum mechanism, [22,23] and an improved flat-island approach. [24] Along with the great progress of the computer digital-image processing technology, the point-to-point resolution recognition technology of the super microscope technology has also made a breakthrough improvement.…”

Section: Introductionmentioning

confidence: 99%

Center Atom Model for Strain Mapping of Void and Crack of Atomic Lattice Image

Ying-jun

Kun

et al. 2022

Cryst. Res. Technol.

View full text Add to dashboard Cite

Aiming at the strain distribution around the atomic lattice defect with void and crack in crystal materials, a new elastic strain calculation method named as center atom model (CAM) is proposed in this work, and is applied for mapping the strain field of the defect with void in an atomic image lattice in real space under external forcing. As an example, the strain mapping of voids and cracks of an atomic lattice image from phase field crystal (PFC) model is quantitatively characterized by CAM. The results show that CAM can well be used to extract the strain information from various types of the defect surface of atomic lattice images. Wherever the strain distribution around the dislocation of the grain boundary or the strain around the void and crack is, CAM can accurately extract the strain distribution of the distortion area of the atomic lattice. CAM can also be easily extended and applied to the strain mapping of the defects in the heterogeneous interface.

show abstract

Examining the change of half-period voltage in longitudinal electro-optic modulation and residual stress of potassium dihydrogen phosphate crystal

Liu,

Gao,

Wang

et al. 2023

Appl. Opt.

View full text Add to dashboard Cite

In this paper, the voltage-transmittance curvesKDP crystals were measured accurately between two crossed or parallel polarizers using longitudinal electro-optic effect. The end faces of rectangular KDP samples were coated with ring-shaped electrodes using conductive silver paint (CSP). The change of half period voltage U i has been investigated. A method for quantitative characterization of residual stress has been proposed, based on deviation voltage U d . The results demonstrate that loading voltage is close to the integration of electric field intensity in crystal along the optical path when the CSP ring electrodes have a large outer radius R, small inner radius r, and long-distance d. The half-period voltage U i is also close to longitudinal half-wave voltage U π in these circumstances. The unclamped electro-optic coefficient γ63 σ of KDP crystal at room temperature was measured as 10.24±0.05pm/V at the wavelength of 632.8 nm.

show abstract

3D Residual Strain in DKDP Crystals by Neutron Diffraction

Cited by 4 publications

References 22 publications

Progress on deuterated potassium dihydrogen phosphate (DKDP) crystals for high power laser system application

Progress on deuterated potassium dihydrogen phosphate (DKDP) crystals for high power laser system application

Center Atom Model for Strain Mapping of Void and Crack of Atomic Lattice Image

Examining the change of half-period voltage in longitudinal electro-optic modulation and residual stress of potassium dihydrogen phosphate crystal

Contact Info

Product

Resources

About