50 citations · 171 across the 16 of their papers we have counts for
16 papers
Shock Hugoniot of diamond from 3 to 80 TPa
Damian C. Swift, Andrea L. Kritcher, Amy Lazicki +13
The principal Hugoniot of carbon, initially diamond, was measured from 3 to 80 TPa (30 to 800 million atmospheres), the highest pressure ever achieved, using radiography of spheric…
Improved analysis of converging shock radiographs
Damian C. Swift, Andrea L. Kritcher, Amy Lazicki +6
We previously reported an experimental platform to induce a spherically-convergent shock in a sample using laser-driven ablation, probed with time-resolved x-ray radiography, and a…
Benchmarking boron carbide equation of state using computation and experiment
Shuai Zhang, Michelle C. Marshall, Lin H. Yang +13
Boron carbide (BC) is of both fundamental scientific and practical interest in inertial confinement fusion (ICF) and high energy density physics experiments. We report the resu…
Comparison of ablators for the polar direct drive exploding pusher platform
Heather D. Whitley, G. Elijah Kemp, Charles Yeamans +36
We examine the performance of pure boron, boron carbide, high density carbon, and boron nitride ablators in the polar direct drive exploding pusher (PDXP) platform. The platform us…
Simultaneous compression and opacity data from time-series radiography with a Lagrangian marker
Damian C. Swift, Andrea L. Kritcher, James A. Hawreliak +12
Time-resolved radiography can be used to obtain absolute shock Hugoniot states by simultaneously measuring at least two mechanical parameters of the shock, and this technique is pa…
Equation of state of warm-dense boron nitride combining computation, modeling, and experiment
Shuai Zhang, Amy Lazicki, Burkhard Militzer +18
The equation of state (EOS) of materials at warm dense conditions poses significant challenges to both theory and experiment. We report a combined computational, modeling, and expe…
Opacity of Shock-Heated Boron Plasmas
W. R. Johnson, J. Nilsen
Standard measures of opacity, the imaginary part of the atomic scattering factor and the x-ray mass attenuation coefficient , are evaluated in shock-heated boron, boron…
Theoretical and experimental investigation of the equation of state of boron plasmas
Shuai Zhang, Burkhard Militzer, Michelle C. Gregor +11
We report a theoretical equation of state (EOS) table for boron across a wide range of temperatures (5.110-5.210 K) and densities (0.25-49 g/cm), and ex…
X-ray line coincidence photopumping in a solar flare
F. P. Keenan, K. Poppenhaeger, M. Mathioudakis +6
Line coincidence photopumping is a process where the electrons of an atomic or molecular species are radiatively excited through the absorption of line emission from another specie…
Average-atom treatment of relaxation time in X-ray Thomson scattering from warm-dense matter
Walter R. Johnson, Joseph Nilsen
The influence of finite relaxation times on Thomson scattering from warm-dense plasmas is examined within the framework of the average-atom approximation. Presently most calculatio…
X-ray Thomson scattering for partially ionized plasmas including the effect of bound levels
J. Nilsen, W. R. Johnson, K. T. Cheng
X-ray Thomson scattering is being developed as a method to measure the temperature, electron density, and ionization state of high energy density plasmas such as those used in iner…
Resonant Bound-Free Contributions to Thomson Scattering of X-rays by Warm Dense Matter
W. R. Johnson, J. Nilsen, K. T. Cheng
Recent calculations [Nilsen et al. arXiv:1212.5972] predict that contributions to the scattered photon spectrum from 3s and 3p bound states in chromium (Z=24) at metallic density a…
The effect of bound states on X-ray Thomson scattering for partially ionized plasmas
J. Nilsen, W. R. Johnson, K. T. Cheng
X-ray Thomson scattering is being developed as a method to measure the temperature, electron density, and ionization state of high energy density plasmas such as those used in iner…
Average-Atom Model for X-ray Scattering from Warm Dense Matter
W. R. Johnson, J. Nilsen, K. T. Cheng
A scheme for analyzing Thomson scattering of x-rays by warm dense matter, based on the average-atom model, is developed. Emphasis is given to x-ray scattering by bound electrons. C…
Using the X-FEL to understand X-ray Thomson scattering for partially ionized plasmas
J. Nilsen, W. R. Johnson, K. T. Cheng
For the last decade numerous researchers have been trying to develop experimental techniques to use X-ray Thomson scattering as a method to measure the temperature, electron densit…
Thomson scattering in the average-atom approximation
W. R. Johnson, J. Nilsen, K. T. Cheng
The average-atom model is applied to study Thomson scattering of x-rays from warm-dense matter with emphasis on scattering by bound electrons. Parameters needed to evaluate the dyn…