Measurement of turbulent velocity and bounds for thermal diffusivity in laser shock compressed foams by X-ray photon correlation spectroscopy

Journal article

Experimental benchmarking of transport coefficients under extreme conditions is required for validation of differing theoretical models. To date, measurement of transport properties of dynamically compressed samples remains a challenge with only a limited number of studies able to quantify transport in high pressure and temperature matter. X-ray photon correlation spectroscopy utilizes coherent X-ray sources to measure time correlations of density fluctuations, thus providing measurements of length and time scale dependent transport properties. Here,we present a first-of-a-kind experiment to conduct X-ray photon correlation spectroscopy in laser shock compression experiments. We report measurement of the turbulent velocity in the wake of a laser driven supersonic shock and place an upper bound on thermal diffusivity in a solid density plasma on nanosecond timescales.

Authors: Heaton, C; Yin, H; Khaghani, D; Crepisson, C; Stuart, C

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Physical Society
• Journal: Physical Review E: Statistical, Nonlinear, and Soft Matter Physics
• Volume: 112
• Article number: 045218
• Publication date: 2025-10-29
• Acceptance date: 2025-10-03
• DOI: 10.1103/lff9-f3c1
• EISSN: 1550-2376
• ISSN: 1539-3755
• Language: English