Extending Equation-of-State Measurements to Gigabar Pressures

Executive Summary

We propose to measure the equation-of-state of materials at pressures exceeding 100 megabars, where theoretical models are largely unconstrained by experimental observations. We will modify the gigabar platform at the National Ignition Facility to include temperature measurements, thereby providing crucial experimental data to constrain models used in inertial confinement fusion and stockpile stewardship applications.

Publications, Presentations, and Patents

Cordova, T., M. J. MacDonald, T. Döppner, F. N. Beg, M. Dozieres, B. Kozioziemski, N. A. Pablant, C. M. Sorce, and N. G. Whiting. "Absolute Calibration of the Conical Crystal Configuration of the Zinc Spectrometer (ZSPEC) at the OMEGA Laser Facility." Review of Scientific Instruments 93 (8). 2022. https://doi.org/10.1063/5.0099176. LLNL-JRNL-835280 .

Saumon, D. et al. "Scratching Below the Surface of White Dwarf Stars: Equation of State Measurements at Unprecedented Pressures." Institute of Laser Engineering at Osaka University and High Energy Density Science Center Seminar. February, 2022. LLNL-PRES-832265.

Springstead, M. P. et al. "Analysis of Systematic Uncertainties in X-ray Spectroscopy Data." Omega Laser Users Group, Rochester, NY. April 28, 2022. LLNL-POST-834665.

Jenei, A. E. et al. Center for Matter at Atomic Pressures Annual Meeting, "keV Chemistry Questions." Rochester, NY. May, 2022. LLNL-PRES-839553.

Springstead, M. P. et al. "Analysis of Systematic Uncertainties in X-Ray Spectroscopy Data." High Temperature Plasma Diagnostics, Rochester, NY. May, 2022. LLNL-POST-839401.

Cordova, T. et al. "Absolute Calibration of the Conical Crystal Configuration of the ZSPEC at the OMEGA Laser Facility." High Temperature Plasma Diagnostics, Rochester, NY. May, 2022. LLNL-POST-835069.

Glenzer, S. H. et al. "X-Ray Measurements of the Equation of State of White Dwarf Conditions." High Energy Density Laboratory Astrophysics (HEDLA), Lisbon, Portugal. May, 2022. LLNL-PRES-839399.

Jenei, A. E. et al. "Beyond Earth: Pressure as an Experimental Probel." 2022 Gordon Research Conference: Research at High Pressure, Holderness, NH. July, 2022. LLNL-PRES-840295.

Springstead, M. P. et al. "Developing a Shock-Ramp Laser Drive to Extend the Pressure Range of the NIF Gbar Platform Single-Shot Hugoniot Measurement." NIF&PS Summer Scholar Poster Symposium, Livermore, CA, August, 2022. LLNL-POST-837993.

MacDonald, M. J. et al. "Developing X-Ray Fluorescence Spectroscopy as a Temperature Diagnostic for HED Physics Experiments." Institute of Laser Engineering at Osaka University and High Energy Density Science Center Seminar, August, 2022. LLNL-PRES-839398.