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Title: Thermal transport in warm dense matter revealed by refraction-enhanced x-ray radiography with a deep-neural-network analysis

Journal Article · · Communications Physics

Abstract Transport properties of high energy density matter affect the evolution of many systems, ranging from the geodynamo in the Earth’s core, to hydrodynamic instability growth in inertial confinement fusion capsules. Large uncertainties of these properties are present in the warm dense matter regime where both plasma models and condensed matter models become invalid. To overcome this limit, we devise an experimental platform based on x-ray differential heating and time-resolved refraction-enhanced radiography coupled to a deep neural network. We retrieve the first measurement of thermal conductivity of CH and Be in the warm dense matter regime and compare our measurement with the most commonly adopted models. The discrepancies observed are related to the estimation of a correction term from electron-electron collisions. The results necessitate improvement of transport models in the warm dense matter regime and could impact the understanding of the implosion performance for inertial confinement fusion.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); University of Rochester, NY (United States)
Sponsoring Organization:
USDOE; USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Grant/Contract Number:
AC52-07NA27344; NA0003525; NA0003856
OSTI ID:
1973159
Report Number(s):
LLNL-JRNL-836810; 98; PII: 1190
Journal Information:
Communications Physics, Journal Name: Communications Physics Journal Issue: 1 Vol. 6; ISSN 2399-3650
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United Kingdom
Language:
English

References (48)

Practical Improvements to the Lee-More Conductivity Near the Metal-Insulator Transition journal March 2001
X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92 journal July 1993
U-Net: Convolutional Networks for Biomedical Image Segmentation
  • Ronneberger, Olaf; Fischer, Philipp; Brox, Thomas
  • Medical Image Computing and Computer-Assisted Intervention – MICCAI 2015: 18th International Conference, Munich, Germany, October 5-9, 2015, Proceedings, Part III https://doi.org/10.1007/978-3-319-24574-4_28
book November 2015
HYADES—A plasma hydrodynamics code for dense plasma studies journal January 1994
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Ab initio calculation of transport and optical properties of aluminum: Influence of simulation parameters journal November 2013
Equation of state, occupation probabilities and conductivities in the average atom Purgatorio code journal May 2007
High-mode Rayleigh-Taylor growth in NIF ignition capsules journal June 2010
Purgatorio—a new implementation of the Inferno algorithm journal May 2006
Development of a Multiphase Beryllium Equation of State and Physics-based Variations journal February 2021
Phase imaging with an untrained neural network journal May 2020
Imaging Shock Waves in Diamond with Both High Temporal and Spatial Resolution at an XFEL journal June 2015
Three-dimensional HYDRA simulations of National Ignition Facility targets journal May 2001
Refraction-enhanced x-ray radiography for inertial confinement fusion and laser-produced plasma applications journal June 2009
On the transport coefficients of hydrogen in the inertial confinement fusion regime journal May 2011
A new global equation of state model for hot, dense matter journal September 1995
Hot-electron production and suprathermal heat flux scaling with laser intensity from the two-plasmon–decay instability journal October 2012
Differential heating: A versatile method for thermal conductivity measurements in high-energy-density matter journal September 2015
First-principles investigations on ionization and thermal conductivity of polystyrene for inertial confinement fusion applications journal April 2016
X-ray streaked refraction enhanced radiography for inferring inflight density gradients in ICF capsule implosions journal October 2018
An electron conductivity model for dense plasmas journal January 1984
A new quotidian equation of state (QEOS) for hot dense matter journal January 1988
Descriptors representing two- and three-body atomic distributions and their effects on the accuracy of machine-learned inter-atomic potentials journal June 2020
Relaxation of electrons in quantum-confined states in Pb/Si(111) thin films from master equation with first-principles-derived rates journal December 2019
Refraction-enhanced x-ray radiography for density profile measurements at CH/Be interface journal September 2011
The Physics of Inertial Fusion book January 2004
Thermal Properties of the Inhomogeneous Electron Gas journal March 1965
Exact Lower Bounds for Some Equilibrium Properties of a Classical One-Component Plasma journal July 1968
Transport Phenomena in a Completely Ionized Gas journal March 1953
Analytic fit to the one-component-plasma structure factor journal November 1991
On-the-fly machine learning force field generation: Application to melting points journal July 2019
Ab initiomolecular dynamics for liquid metals journal January 1993
Ab initio molecular-dynamics simulation of the liquid-metal–amorphous-semiconductor transition in germanium journal May 1994
Projector augmented-wave method journal December 1994
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Electronic transport coefficients from ab initio simulations and application to dense liquid hydrogen journal June 2011
Lattice electrical resistivity of magnetic bcc iron from first-principles calculations journal January 2012
Model of electron transport in dense plasmas spanning temperature regimes journal May 2020
Ab Initio Determination of Thermal Conductivity of Dense Hydrogen Plasmas journal February 2009
Phase Transitions of Hybrid Perovskites Simulated by Machine-Learning Force Fields Trained on the Fly with Bayesian Inference journal June 2019
Generalized Gradient Approximation Made Simple journal October 1996
Generalized Gradient Approximation Made Simple [Phys. Rev. Lett. 77, 3865 (1996)] journal February 1997
Ion Structure Factors and Electron Transport in Dense Coulomb Plasmas journal December 1998
First-principles derivation and properties of density-functional average-atom models journal April 2022
Phase Retrieval with Application to Optical Imaging: A contemporary overview journal May 2015
On the use of deep learning for computational imaging journal January 2019
Electron dynamics in extended systems within real-time time-dependent density-functional theory journal September 2022