Plasma-density determination from x-ray radiography of laser-driven spherical implosions

The fuel layer density of an imploding laser-driven spherical shell is inferred from framed x-ray radiographs. The density distribution is determined by using Abel inversion to compute the radial distribution of the opacity kappa from the observed optical depth tau. With the additional assumption of...

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Published inPhysical review letters Vol. 102; no. 18; p. 185004
Main Authors Marshall, F J, McKenty, P W, Delettrez, J A, Epstein, R, Knauer, J P, Smalyuk, V A, Frenje, J A, Li, C K, Petrasso, R D, Séguin, F H, Mancini, R C
Format Journal Article
LanguageEnglish
Published United States 08.05.2009
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Summary:The fuel layer density of an imploding laser-driven spherical shell is inferred from framed x-ray radiographs. The density distribution is determined by using Abel inversion to compute the radial distribution of the opacity kappa from the observed optical depth tau. With the additional assumption of the mass of the remaining fuel, the absolute density distribution is determined. This is demonstrated on the OMEGA laser system with two x-ray backlighters of different mean energies that lead to the same inferred density distribution independent of backlighter energy.
ISSN:0031-9007
DOI:10.1103/physrevlett.102.185004