Surface roughness measurements of beta-layered solid deuterium-tritium in toroidal geometries

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Description

New experiments in a NIF-scale toroidal cylinder have resulted in true shadowgraphs of the DT ice surface. The spectral analysis of the images summed over l-modes 2 through 256 reveal that the surface roughness reaches values just below 1.0 {micro}m at temperatures of 19 K and above. Summing only modes l {ge} 10, the partial surface roughness is below 0.7 {micro}m at 19.5 K. These results indicate that native beta-layering will be sufficient to meet the NIF requirements for DT ice surface finish for both Be and CH ablating shells. The toroidal cylinder incorporates a linear heater along the cylindrical ... continued below

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6 p.

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Hoffer, J.K.; Foreman, L.R.; Sanchez, J.J.; Mapoles, E.R. & Sheliak, J.D. July 1, 1996.

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Description

New experiments in a NIF-scale toroidal cylinder have resulted in true shadowgraphs of the DT ice surface. The spectral analysis of the images summed over l-modes 2 through 256 reveal that the surface roughness reaches values just below 1.0 {micro}m at temperatures of 19 K and above. Summing only modes l {ge} 10, the partial surface roughness is below 0.7 {micro}m at 19.5 K. These results indicate that native beta-layering will be sufficient to meet the NIF requirements for DT ice surface finish for both Be and CH ablating shells. The toroidal cylinder incorporates a linear heater along the cylindrical axis to test the concept of surface enhancement due to heat assisted beta-layering in DT. Additionally, with the use of this heater it is possible to symmetrize a pure D{sub 2} layer.

Physical Description

6 p.

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INIS; OSTI as DE96012640

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  • Annual meeting of the American Nuclear Society (ANS), Reno, NV (United States), 16-20 Jun 1996

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  • Other: DE96012640
  • Report No.: LA-UR--96-2027
  • Report No.: CONF-9606116--57
  • Grant Number: W-7405-ENG-36
  • DOI: 10.2172/257456 | External Link
  • Office of Scientific & Technical Information Report Number: 257456
  • Archival Resource Key: ark:/67531/metadc669084

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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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  • July 1, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 26, 2016, 6:34 p.m.

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Hoffer, J.K.; Foreman, L.R.; Sanchez, J.J.; Mapoles, E.R. & Sheliak, J.D. Surface roughness measurements of beta-layered solid deuterium-tritium in toroidal geometries, report, July 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc669084/: accessed December 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.