RECENT RESULTS OF RADIATION HYDRODYNAMICS AND TURBULENCE EXPERIMENTS IN CYLINDRICAL GEOMETRY.

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Cylindrical implosion experiments at the University of Rochester laser facility, OMEGA, were performed to study radiation hydrodynamics and compressible turbulence in convergent geometry. Laser beams were used to directly drive a cylinder with either a gold (AU) or dichloropolystyrene (C6H8CL2) marker layer placed between a solid CH ablator and a foam cushion. When the cylinder is imploded the Richtmyer-Meshkov instability and convergence cause the marker layer to increase in thickness. Marker thickness measurements were made by x-ray backlighting along the cylinder axis. Experimental results of the effect of surface roughness will be presented. Computational results with an AMR code are ... continued below

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10 p.

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R.), Magelssen G. R. (Glenn; Scott, J. M. (John M.); Batha, S. H. (Steven H.); Holmes, R. L. (Richard L.); Lanier, N. E. (Nicholas E.); Tubbs, D. L. (David L.) et al. January 1, 2001.

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Cylindrical implosion experiments at the University of Rochester laser facility, OMEGA, were performed to study radiation hydrodynamics and compressible turbulence in convergent geometry. Laser beams were used to directly drive a cylinder with either a gold (AU) or dichloropolystyrene (C6H8CL2) marker layer placed between a solid CH ablator and a foam cushion. When the cylinder is imploded the Richtmyer-Meshkov instability and convergence cause the marker layer to increase in thickness. Marker thickness measurements were made by x-ray backlighting along the cylinder axis. Experimental results of the effect of surface roughness will be presented. Computational results with an AMR code are in good agreement with the experimental results from targets with the roughest surface. Computational results suggest that marker layer 'end effects' and bowing increase the effective thickness of the marker layer at lower levels of roughness.

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10 p.

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  • "Submitted to: 2nd International Conference IFSA in Kyoto, Japan, Sept. 9-14, 2001."

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  • Report No.: LA-UR-01-4983
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 975730
  • Archival Resource Key: ark:/67531/metadc928922

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  • January 1, 2001

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 12:58 p.m.

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R.), Magelssen G. R. (Glenn; Scott, J. M. (John M.); Batha, S. H. (Steven H.); Holmes, R. L. (Richard L.); Lanier, N. E. (Nicholas E.); Tubbs, D. L. (David L.) et al. RECENT RESULTS OF RADIATION HYDRODYNAMICS AND TURBULENCE EXPERIMENTS IN CYLINDRICAL GEOMETRY., article, January 1, 2001; United States. (digital.library.unt.edu/ark:/67531/metadc928922/: accessed December 14, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.