## Tilo Doeppner | 21-ERD-029

### Executive Summary

We are developing a novel diagnostic technique using diffractive radiography to measure particle diffusion with sub-1-micron spatial resolution across the interface of two warm dense matter samples. Successful results will open a new regime in high-energy-density science in support of stockpile stewardship and energy security missions.

### Publications, Presentations, and Patents

Allen, C.H., M. Oliver, T.G. White, W. Theobald, A. Saunders, Y. Ping, O. Landen, L. Divol and T. Doeppner, "Developing x-ray Fresnel Diffractive-Refractive Radiography for Measuring Mutual Diffusion in Warm Dense Matter." 62nd Annual Meeting of the American Physical Society Division of Plasma Physics, November 2020. LLNL-PRES-817703.

Allen, C.H., M. Oliver, T.G. White, W. Theobald, A. Saunders, Y. Ping, O. Landen, L. Divol and T. Doeppner, "Developing x-ray Fresnel Diffractive-Refractive Radiography for Measuring Mutual Diffusion in Warm Dense Matter." 23rd Topical Conference on High-Temperature Plasma Diagnostics (HTPD), December 2020. LLNL-PRES-817704.

Allen, C.H., M. Oliver, L. Divol, O. Landen, Y. Ping, M. Schoelmerich, W. Theobald, T. Doeppner and T.G. White, "Development of slit projection radiography with 1µm resolution at the Omega Laser Facility." OSA Imaging and Applied Optics Congress, Vancouver, July 2021. LLNL-PRES-825433.

Allen, C.H., M. Oliver, L. Divol, A. Kemp, O. Landen, Y. Ping, M. Schoelmerich, W. Theobald, T. Doeppner and T.G. White, "Measuring Dynamic Density Gradients in Warm Dense Matter with 1 µm Spatial Resolution." OSA Imaging and Applied Optics Congress, South Lake Tahoe, September 2021. LLNL-PRES-827034.

White, T.G, T. Doeppner, C.H. Allen, M. Oliver, L. Divol, A. Kemp, O. Landen, Y. Ping, M. Schoelmerich, W. Theobald, A. Saunders, D. Gericke, Z. Karmioal, and C. Spindloe, "Fresnel Diffractive Radiography (FDR) at Omega and NIF." 16th International Conference on the Physics of Non-Ideal Plasmas, Dresden, September 2021. LLNL-PRES-827035.