@inproceedings{e1d90aabdda64aefab4b737be1254215,
title = "Cylindrical Driven Shocks in Ceria",
abstract = "Shock compression of granular ceria (CeO) was studied in converging cylindrical geometry using LANL proton radiography, and driven by the Precision High Energy-Density Liner Implosion Experiment (PHELIX) magnetic implosion system. PHELIX delivered nearly 4 MA to a 1.25-mm thick liner-impactor to magnetically accelerate it to 0.8-1.0 mm μs-1. The impactor launched a shock in the cylindrical Al outer wall of the target assembly containing equiaxed, 0.63-μm-mean diameter ceria powder initially compacted to a static density of 3.95 or 4.03 g cm-3. The cylindrically converging shock in the target was observed with a series of 21 proton-radiographic frames down the axis of the cylinder. Proton radiography was performed using a ×3 magnetic lens magnifier and a 7.5-mrad collimator. The proton radiographic views were transformed from transmission images to areal density images, for comparison to a model. Results indicate that significant energy was expended in compacting the porous CeO, as the wave velocity markedly decreases during convergence, and a clear shock reflected from the axis was not observed. These observations are inconsistent with pre-shot modeling, and highlight the need for an improved understanding of the physics of compaction under non-ideal loading configurations.",
keywords = "PHELIX, liner implosion, proton radiography",
author = "Freeman, {M. S.} and Rousculp, {C. L.} and Fredenburg, {D. A.} and Bradley, {J. T.} and Donovan, {P. M.} and Dunwoody, {J. T.} and F. Fierro and Griego, {J. R.} and Lamar, {J. C.} and Mariam, {F. G.} and Neukirch, {L. P.} and Oro, {D. M.} and Patten, {A. R.} and Randolph, {R. B.} and Reass, {W. A.} and Reinovsky, {R. E.} and A. Saunders and Sjue, {S. K.} and Z. Tang and Turchi, {P. J.} and Voorhees, {T. J.}",
note = "Publisher Copyright: {\textcopyright} 2018 IEEE.; 16th International Conference on Megagauss Magnetic Field Generation and Related Topics, MEGAGAUSS 2018 ; Conference date: 25-09-2018 Through 29-09-2018",
year = "2018",
month = jul,
day = "2",
doi = "10.1109/MEGAGAUSS.2018.8722648",
language = "English",
series = "2018 16th International Conference on Megagauss Magnetic Field Generation and Related Topics, MEGAGAUSS 2018 - Proceedings",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
booktitle = "2018 16th International Conference on Megagauss Magnetic Field Generation and Related Topics, MEGAGAUSS 2018 - Proceedings",
}