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Title: Constraining Physical Models at Gigabar Pressures

Abstract

High-energy-density (HED) experiments in convergent geometry are able to test physical models at pressures beyond hundreds of millions of atmospheres. The measurements from these experiments are generally highly integrated and require unique analysis techniques to procure quantitative information. This work describes a methodology to constrain the physics in convergent HED experiments by adapting the methods common to many other fields of physics. As an example, a mechanical model of an imploding shell is constrained by data from a thin-shelled direct-drive exploding-pusher experiment on the OMEGA Laser System using Bayesian inference, resulting in the reconstruction of the shell dynamics and energy transfer during the implosion. The model is tested by analyzing synthetic data from a 1-D hydrodynamics code and is sampled using a Markov chain Monte Carlo to generate the posterior distributions of the model parameters. The goal of this work is to demonstrate a general methodology that can be used to draw conclusions from a wide variety of HED experiments.

Authors:
; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
DOE Contract Number:  
NA0003856; SC0019269; NA0003960; AC52-07NA27344
Research Org.:
Univ. of Rochester, NY (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1887430
DOI:
https://doi.org/10.7910/DVN/R3SHSK

Citation Formats

Ruby, J. J., Rygg, J. R., Chin, D. A., Gaffney, J. A., Adrian, P., Bishel, D., Forrest, C. J., Glebov, V. Yu., Kabadi, N. V., Nilson, P. M., Ping, Y., Stoeckl, C., and Collins, G. W. Constraining Physical Models at Gigabar Pressures. United States: N. p., 2021. Web. doi:10.7910/DVN/R3SHSK.
Ruby, J. J., Rygg, J. R., Chin, D. A., Gaffney, J. A., Adrian, P., Bishel, D., Forrest, C. J., Glebov, V. Yu., Kabadi, N. V., Nilson, P. M., Ping, Y., Stoeckl, C., & Collins, G. W. Constraining Physical Models at Gigabar Pressures. United States. doi:https://doi.org/10.7910/DVN/R3SHSK
Ruby, J. J., Rygg, J. R., Chin, D. A., Gaffney, J. A., Adrian, P., Bishel, D., Forrest, C. J., Glebov, V. Yu., Kabadi, N. V., Nilson, P. M., Ping, Y., Stoeckl, C., and Collins, G. W. 2021. "Constraining Physical Models at Gigabar Pressures". United States. doi:https://doi.org/10.7910/DVN/R3SHSK. https://www.osti.gov/servlets/purl/1887430. Pub date:Fri Jun 25 00:00:00 EDT 2021
@article{osti_1887430,
title = {Constraining Physical Models at Gigabar Pressures},
author = {Ruby, J. J. and Rygg, J. R. and Chin, D. A. and Gaffney, J. A. and Adrian, P. and Bishel, D. and Forrest, C. J. and Glebov, V. Yu. and Kabadi, N. V. and Nilson, P. M. and Ping, Y. and Stoeckl, C. and Collins, G. W.},
abstractNote = {High-energy-density (HED) experiments in convergent geometry are able to test physical models at pressures beyond hundreds of millions of atmospheres. The measurements from these experiments are generally highly integrated and require unique analysis techniques to procure quantitative information. This work describes a methodology to constrain the physics in convergent HED experiments by adapting the methods common to many other fields of physics. As an example, a mechanical model of an imploding shell is constrained by data from a thin-shelled direct-drive exploding-pusher experiment on the OMEGA Laser System using Bayesian inference, resulting in the reconstruction of the shell dynamics and energy transfer during the implosion. The model is tested by analyzing synthetic data from a 1-D hydrodynamics code and is sampled using a Markov chain Monte Carlo to generate the posterior distributions of the model parameters. The goal of this work is to demonstrate a general methodology that can be used to draw conclusions from a wide variety of HED experiments.},
doi = {10.7910/DVN/R3SHSK},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2021},
month = {6}
}

Works referencing / citing this record:

Constraining physical models at gigabar pressures
journal, November 2020