| 研究実績の概要 |
Achievements in experiment and simulations accomplished in 2023 FY delivered a new knowledge allowing to finalized the all project tasks.
Two beamtime runs had been performed at SACLA XFEL. Utilizing the multi-imaging phase-contract method developed in 2021-2022 FYs: 1)the ultrafast dislocation motion in shock-compressed diamond have been tracked and provided inaccessible before data on dislocation motion speed and its dependence on shock loading direction. For the first time, the evaluation of models and atomistic simulations predicted transonic limit of the speed became possible which is important for understanding phenomena that occur under high shear stress, including shear processes in the Earth mantle;2)the interaction of shock waves with heterogeneous material structures (voids or high-density obstacles) under pressure of ~ 100 GPa were visualized in the stages of the high-speed deformation and destruction essential for modeling of material properties in material science, earth, and planetary physics.
In theory and simulation, the direct imaging of the shock waves evolution in diamond from initial formation to the turbulent phase of energy dissipation leaded, for the first time, to the fitting and validation of the 2D hydrodynamic failure model.
Created basis for study of complex fast evolving phenomena (plasma instabilities, interaction of supersonic flows with obstacles, turbulence power spectrum) under external magnetic field (KAKENHI 24K06988).
Research performed in collaboration with: SLAC and Stanford Univ., USA; LULI, France; EuXFEL, Germany; ENEA, Italy
|
