Decomposable Mandrel Project. Progress report

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Description

We report on our progress in developing a new technology to produce both Nova and NIF scale capsules using a depolymerizable mandrel. In this technique we use poly({alpha}-methylstyrene) (PAMS) beads or shells as mandrels which are overcoated with plasma polymer. The poly({alpha}-methylstyrene) mandrel is then thermally depolymerized to gas phase monomer which diffuses away through the more thermally stable plasma polymer coating, leaving a hollow shell. Since our last report we have concentrated on characterization of the final shell. Starting with PAMS bead mandrels leads to distorted pyrolyzed shells because of thermally induced creep of the CH coating. We found ... continued below

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14 p.

Creation Information

Letts, S. A.; Fearon, E.; Allison, L.; Buckley, S.; Saculla, M. & Cook, R. May 8, 1995.

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Description

We report on our progress in developing a new technology to produce both Nova and NIF scale capsules using a depolymerizable mandrel. In this technique we use poly({alpha}-methylstyrene) (PAMS) beads or shells as mandrels which are overcoated with plasma polymer. The poly({alpha}-methylstyrene) mandrel is then thermally depolymerized to gas phase monomer which diffuses away through the more thermally stable plasma polymer coating, leaving a hollow shell. Since our last report we have concentrated on characterization of the final shell. Starting with PAMS bead mandrels leads to distorted pyrolyzed shells because of thermally induced creep of the CH coating. We found that plasma polymer coatings on hollow shell mandrels shrink isotropically during pyrolysis and maintain sphericity. We are now concentrating our efforts on the use of microencapsulated shells to prepare targets with buried diagnostic layers or inner wall surface texture.

Physical Description

14 p.

Notes

INIS; OSTI as DE95014515

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  • Other Information: PBD: 8 May 1995

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  • Other: DE95014515
  • Report No.: UCRL-ID--120913
  • Grant Number: W-7405-ENG-48
  • DOI: 10.2172/85915 | External Link
  • Office of Scientific & Technical Information Report Number: 85915
  • Archival Resource Key: ark:/67531/metadc778710

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  • May 8, 1995

Added to The UNT Digital Library

  • Dec. 3, 2015, 9:30 a.m.

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  • Feb. 18, 2016, 12:19 p.m.

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Letts, S. A.; Fearon, E.; Allison, L.; Buckley, S.; Saculla, M. & Cook, R. Decomposable Mandrel Project. Progress report, report, May 8, 1995; California. (digital.library.unt.edu/ark:/67531/metadc778710/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.