Improvement of Lattice Parameter Accuracy in Single Crystal XRD Based on a Laser-Induced X-Ray Source

The lattice parameter, measured with sufficient accuracy, can be utilized to evaluate the quality of single crystals and to determine the equation of state for materials. We propose an iterative method for obtaining more precise lattice parameters using the interaction points for the pseudo-Kossel pattern obtained from laser-induced X-ray diffraction (XRD). This method has been validated by the analysis of an XRD experiment conducted on iron single crystals. Furthermore, the method was used to calculate the compression ratio and rotated angle of an LiF sample under high pressure loading. This technique provides a robust tool for in-situ characterization of structural changes in single crystals under extreme conditions. It has significant implications for studying the equation of state and phase transitions.