MODELING OF TIME-RESOLVED X-RAY-DIFFRACTION FROM LASER-SHOCKED CRYSTALS

The rapid laser driven shock compression of solids is modeled using a hydrodynamic computer code. By postprocessing output from these simula tions and using a new, efficient x-ray diffraction algorithm we calcul ate time-dependent x-ray diffraction images which can be directly comp ared with experimental x-ray diffraction data, The measurement of shoc k compression of crystalline solids by x-ray diffraction is illustrate d with three examples, one a square wave, and two triangular waves. Th e development of these waves and the associated x-ray diffraction patt erns are followed as the waves propagate through the crystalline solid and interact with a free surface. Simulated x-ray streak camera data created with this hydrodynamic-x-ray diffraction model are presented a nd are compared to experimental data. (C) 1997 American Institute of P hysics.