Automated Iterative Forward Analysis for Pressure Determination in Dynamic Compression Experiments
POSTER
Abstract
High-powered laser compression experiments can provide insights into material behavior at solar and planetary cores - some of the most extreme environments in the Universe. To fully understand material response at such extreme conditions, the pressure within the sample must be accurately determined. However, pressure cannot be measured directly. Experiments combine the velocity measured within a sample with the material's equation of state to extract a pressure history. As new driver developments increase laser shot rate, going from once a day at the National Ignition Facility to the upcoming sub-Hertz pace at the European X-ray Field Electron Laser, there is a growing need for an automated process to convert experimentally measured velocities into pressure histories. The work reported here implements an automated iterative forward analysis using the HYADES hydrocode that can scale with the growth of modern laser facilities to accurately retrieve pressure histories from a broad range of experimental conditions. We discuss this work in the context of ramp compression of various materials on the OMEGA laser facility.
*This work was funded in part by DOE-NNSA SSAA grant DE-NA0003902 (PI: T. Hufnagel, co-PI: J. Wicks).The project or effort depicted was or is sponsored by the Department of the Defense, Defense Threat Reduction Agency. The content of the information does not necessarily reflect the position or the policy of the federal government, and no official endorsement should be inferred.Additional thanks to the DTRA MSEE-URA for their support.
Presenters
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Connor Krill
- Johns Hopkins University