X-ray diffraction measurements and pressure determination in nanosecond compression of solids up to 600 GPa

Improving precision of pressure determination in nanosecond X-raydiffraction experiments Livermore_Lab

X-ray diffraction measurements under laser-driven dynamic compression now allow us to investigate the atomic structure of matter at TPa pressures and thousands of degree temperatures, with broad implications for condensed matter physics, planetary science, and astronomy.

In addition to simultaneously collecting atomic structure information for multiple compressed samples, namely Pt, Ta, Au, W, and Fe, we demonstrate a different approach for pressure determination applicable to x-ray diffraction experiments under quasi-isentropic ramp compression. The method, based on the use ofpressure calibrants, is similar to the techniques often adopted in static compression with diamond anvil cells.

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