Fast Ignition relevant study of the flux of high intensity laser generated electrons via a hollow cone into a laser-imploded plasma

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An integrated experiment relevant to fast ignition is described. A Cu doped CD spherical shell target is imploded around an inserted hollow Au cone by a six beam 600J, 1ns laser to a peak density of 4gcm{sup -3} and a diameter of 100 {micro}m. A 10 ps, 20TW laser pulse is focused into the cone at the time of peak compression. The flux of high-energy electrons through the imploded material is determined from the yield of Cu K{alpha} fluorescence by comparison with a Monte Carlo model and is estimated to carry 15% of the laser energy. Collisional and Ohmic heating ... continued below

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7 p. (0.2 MB)

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Key, M; Adam, J; Akli, K; Borgheshi, M; Chen, M; Evans, R et al. October 11, 2005.

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Description

An integrated experiment relevant to fast ignition is described. A Cu doped CD spherical shell target is imploded around an inserted hollow Au cone by a six beam 600J, 1ns laser to a peak density of 4gcm{sup -3} and a diameter of 100 {micro}m. A 10 ps, 20TW laser pulse is focused into the cone at the time of peak compression. The flux of high-energy electrons through the imploded material is determined from the yield of Cu K{alpha} fluorescence by comparison with a Monte Carlo model and is estimated to carry 15% of the laser energy. Collisional and Ohmic heating are modeled. An electron spectrometer shows significantly greater reduction of the transmitted electron flux than is due to binary collisions and Ohmic potential. Enhanced scattering by instability-induced magnetic fields is suggested.

Physical Description

7 p. (0.2 MB)

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PDF-file: 7 pages; size: 0.2 Mbytes

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  • Journal Name: Physics of Plasmas , vol. 15, n/a, February 15, 2008, pp. 022701; Journal Volume: 15

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  • Report No.: UCRL-JRNL-216406
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 940139
  • Archival Resource Key: ark:/67531/metadc893024

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  • October 11, 2005

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  • Sept. 27, 2016, 1:39 a.m.

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  • April 17, 2017, 12:53 p.m.

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Key, M; Adam, J; Akli, K; Borgheshi, M; Chen, M; Evans, R et al. Fast Ignition relevant study of the flux of high intensity laser generated electrons via a hollow cone into a laser-imploded plasma, article, October 11, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc893024/: accessed September 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.