Diagnosis of high-temperature implosions using low- and high-opacity Krypton lines

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High-temperature laser target implosions can be achieved by using relatively thin-shell targets, and they can be. diagnosed by doping the fuel with krypton and measuring K-shell and L-shell lines. Electron temperatures of up to 5 keV at modest compressed densities ({approximately}1-5g/cm{sup 3}) are predicted for such experiments, with ion temperatures peaking above 10 keV at the center. It is found that the profiles of low-opacity (optically thin) lines in the expected density range are dominated by the Doppler broadening and can provide a measurement of the ion temperature if spectrometers of spectral resolution {Delta}{lambda}/{lambda} {ge} 1000 are used. For high-opacity ... continued below

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31 p.

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Yaakobi, B.; Epstein, R.; Hooper, C.F. Jr. & Haynes, D.A. Jr. April 1, 1996.

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Description

High-temperature laser target implosions can be achieved by using relatively thin-shell targets, and they can be. diagnosed by doping the fuel with krypton and measuring K-shell and L-shell lines. Electron temperatures of up to 5 keV at modest compressed densities ({approximately}1-5g/cm{sup 3}) are predicted for such experiments, with ion temperatures peaking above 10 keV at the center. It is found that the profiles of low-opacity (optically thin) lines in the expected density range are dominated by the Doppler broadening and can provide a measurement of the ion temperature if spectrometers of spectral resolution {Delta}{lambda}/{lambda} {ge} 1000 are used. For high-opacity lines, obtained with a higher krypton fill pressure, the measurement of the escape factor can yield the {rho}R of the compressed fuel. At higher densities, Stark broadening of low-opacity lines becomes important and can provide a density measurement, whereas lines of higher opacity can be used to estimate the extent of mixing.

Physical Description

31 p.

Notes

INIS; OSTI as DE96007975

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  • Other Information: PBD: [1996]

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  • Other: DE96007975
  • Report No.: DOE/SF/19460--T1
  • Grant Number: FC03-92SF19460
  • DOI: 10.2172/212701 | External Link
  • Office of Scientific & Technical Information Report Number: 212701
  • Archival Resource Key: ark:/67531/metadc670669

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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.

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  • April 1, 1996

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • June 23, 2016, 3:03 p.m.

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Yaakobi, B.; Epstein, R.; Hooper, C.F. Jr. & Haynes, D.A. Jr. Diagnosis of high-temperature implosions using low- and high-opacity Krypton lines, report, April 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc670669/: accessed June 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.