Radiative shocking and acceleration of polycrystalline slabs for investigation of ablative Rayleigh-Taylor instability triggered by ablator microstructure

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It is vital to identify and control all perturbation sources that could trigger ablative Rayleigh-Taylor instability One obvious perturbation 'seed' is surface roughness computed perturbation growth, validated by experiments - Specification for allowable roughness of NIF ignition capsule' is based on But what about infernal microstructure of shell materials? - Beryllium shells are composed of individual crystalline grains with - Polymer shells are composed of long molecular chains that might 'stack like an isotropic elastic/plastic properties logs' with a preferred orientation What happens when shock waves transit anisotropic material? What happens when such material is accelerated by radiation drive? We ... continued below

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19 p.

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Hoffman, N. M. (Nelson M.); Tubbs, D. L. (David L.); Swift, D. C. (Damian C.); Cobble, J. A. (James A.); Kyrala, George A. & Tierney, T. (Thomas) January 1, 2002.

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Description

It is vital to identify and control all perturbation sources that could trigger ablative Rayleigh-Taylor instability One obvious perturbation 'seed' is surface roughness computed perturbation growth, validated by experiments - Specification for allowable roughness of NIF ignition capsule' is based on But what about infernal microstructure of shell materials? - Beryllium shells are composed of individual crystalline grains with - Polymer shells are composed of long molecular chains that might 'stack like an isotropic elastic/plastic properties logs' with a preferred orientation What happens when shock waves transit anisotropic material? What happens when such material is accelerated by radiation drive? We need a specification for allowable internal anisotropy.

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19 p.

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  • Submitted to: 44th Annual APS Division of Plasma Physics Meeting, Orlando, FL, 11-15 November, 2002

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  • Report No.: LA-UR-02-7034
  • Grant Number: none
  • Office of Scientific & Technical Information Report Number: 976441
  • Archival Resource Key: ark:/67531/metadc929664

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  • January 1, 2002

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  • Nov. 13, 2016, 7:26 p.m.

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  • Dec. 12, 2016, 4:36 p.m.

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Hoffman, N. M. (Nelson M.); Tubbs, D. L. (David L.); Swift, D. C. (Damian C.); Cobble, J. A. (James A.); Kyrala, George A. & Tierney, T. (Thomas). Radiative shocking and acceleration of polycrystalline slabs for investigation of ablative Rayleigh-Taylor instability triggered by ablator microstructure, article, January 1, 2002; United States. (digital.library.unt.edu/ark:/67531/metadc929664/: accessed December 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.