Fabrication of special ICF targets using a depolymerizable mandrel technique

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Description

A technique was developed for fabricating Spherical shell targets for implosion physics experiments with diameters up to several millimeters and with unique structural features such as thin metal layers or texture on the inside surface. We start with a spherical bead or thin shell of poly(alpha-methylstyrene) (PAMS) of the desired size, which can be textured by laser photoablation or overcoated with a thin layer of diagnostic material. The mandrel is next overcoated with plasma polymer (CH) 2 to 50 {mu}m thick. Upon heating, the PAMS depolymerizes to gaseous monomer which diffuses through the thermally stable plasma polymer coating leaving a ... continued below

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12 p.

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Letts, S.A.; Fearon, E.M.; Allison, L.M. & Cook, R. October 2, 1995.

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Description

A technique was developed for fabricating Spherical shell targets for implosion physics experiments with diameters up to several millimeters and with unique structural features such as thin metal layers or texture on the inside surface. We start with a spherical bead or thin shell of poly(alpha-methylstyrene) (PAMS) of the desired size, which can be textured by laser photoablation or overcoated with a thin layer of diagnostic material. The mandrel is next overcoated with plasma polymer (CH) 2 to 50 {mu}m thick. Upon heating, the PAMS depolymerizes to gaseous monomer which diffuses through the thermally stable plasma polymer coating leaving a hollow shell. Shells produced by this technique are uniform in wall thickness, and highly spherical. If the PAMS mandrel is textured, the mandrel topology is transferred to the inner wall of the plasma polymer shell. Likewise thermally stable coatings on the mandrel are transferred to the inner shell wall.

Physical Description

12 p.

Notes

INIS; OSTI as DE96003121

Source

  • 42. National Symposium of the American Vacuum Society (AVS), Minneapolis, MN (United States), 16-20 Oct 1995

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  • Other: DE96003121
  • Report No.: UCRL-JC--121115
  • Report No.: CONF-951030--4
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 164454
  • Archival Resource Key: ark:/67531/metadc626410

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 2, 1995

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  • June 16, 2015, 7:43 a.m.

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  • Feb. 23, 2016, 1:40 p.m.

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Letts, S.A.; Fearon, E.M.; Allison, L.M. & Cook, R. Fabrication of special ICF targets using a depolymerizable mandrel technique, article, October 2, 1995; California. (digital.library.unt.edu/ark:/67531/metadc626410/: accessed November 20, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.