New approaches to the preparation of P(alpha)MS beads as mandrels for NIF-scale target capsules

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We report on a new method using heated density gradient columns for preparing spherical poly({alpha} - methylstyrene) (P{alpha}MS) bead mandrels for inertial confinement fusion spherical shell targets. Using 1,2 propane diol/glycerol mixtures, stable density gradient columns for supporting P{alpha}MS beads can be prepared at temperatures as high as 150 {degrees}C. At these temperatures plasticized commercial beads become fluid and spherical, however loss of the plasticizer and very low molecular weight components of the bead due to limited solubility in the column fluid leads to surface finish problems. We also present results on P{alpha}MS beads prepared in an aqueous bath batch ... continued below

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Buckley, S R; Cook, R C; Fearon, E & Letts, S A October 20, 1998.

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We report on a new method using heated density gradient columns for preparing spherical poly({alpha} - methylstyrene) (P{alpha}MS) bead mandrels for inertial confinement fusion spherical shell targets. Using 1,2 propane diol/glycerol mixtures, stable density gradient columns for supporting P{alpha}MS beads can be prepared at temperatures as high as 150 {degrees}C. At these temperatures plasticized commercial beads become fluid and spherical, however loss of the plasticizer and very low molecular weight components of the bead due to limited solubility in the column fluid leads to surface finish problems. We also present results on P{alpha}MS beads prepared in an aqueous bath batch mode. Using these techniques beads with maximum out-of-rounds less than 5 {micro}m have been produced.

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  • Target Fabrication Meeting '98, Jackson Hole, WY, April 19-23, 1998

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  • Other: DE00006147
  • Report No.: UCRL-JC-129955
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 6147
  • Archival Resource Key: ark:/67531/metadc692511

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Office of Scientific & Technical Information Technical Reports

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  • October 20, 1998

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  • Aug. 14, 2015, 8:43 a.m.

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  • May 6, 2016, 10:56 p.m.

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Buckley, S R; Cook, R C; Fearon, E & Letts, S A. New approaches to the preparation of P(alpha)MS beads as mandrels for NIF-scale target capsules, article, October 20, 1998; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc692511/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.