Constraining Physical Models at Gigabar Pressures
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20ja080_full.pdf
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Author(s)
Ruby, J.J.
Rygg, J.R.
Chin, D.A.
Gaffney, J.A.
Adrian, Patrick J.
Bishel, D.
Forrest, C.J.
Glebov, Y.Yu.
Kabadi, Neel V.
Nilson, P.M.
Date Issued
October 2020
Journal
Physical Review E
Publisher
APS
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.
Description
Submitted for publication in Physical Review E
MIT Department
Massachusetts Institute of Technology. Plasma Science and Fusion Center
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevE.102.053210
