First Laser-Plasma Interaction and Hohlraum Experiments on NIF

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Recently the first hohlraum experiments have been performed at the National Ignition Facility (NIF) in support of indirect drive Inertial Confinement Fusion (ICF) designs. The effects of laser beam smoothing by spectral dispersion (SSD) and polarization smoothing (PS) on the beam propagation in long scale gas-filled pipes has been studied at plasma scales as found in indirect drive gas filled ignition hohlraum designs. The long scale gas-filled target experiments have shown propagation over 7 mm of dense plasma without filamentation and beam break up when using full laser smoothing. Vacuum hohlraums have been irradiated with laser powers up to 6 ... continued below

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Dewald, E L; Glenzer, S H; Landen, O L; Suter, L J; Jones, O S; Schein, J et al. June 17, 2005.

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Recently the first hohlraum experiments have been performed at the National Ignition Facility (NIF) in support of indirect drive Inertial Confinement Fusion (ICF) designs. The effects of laser beam smoothing by spectral dispersion (SSD) and polarization smoothing (PS) on the beam propagation in long scale gas-filled pipes has been studied at plasma scales as found in indirect drive gas filled ignition hohlraum designs. The long scale gas-filled target experiments have shown propagation over 7 mm of dense plasma without filamentation and beam break up when using full laser smoothing. Vacuum hohlraums have been irradiated with laser powers up to 6 TW, 1-9 ns pulse lengths and energies up to 17 kJ to activate several diagnostics, to study the hohlraum radiation temperature scaling with the laser power and hohlraum size, and to make contact with hohlraum experiments performed at the NOVA and Omega laser facilities. Subsequently, novel long laser pulse hohlraum experiments have tested models of hohlraum plasma filling and long pulse hohlraum radiation production. The validity of the plasma filling assessment in analytical models and in LASNEX calculations has been proven for the first time. The comparison of these results with modeling will be discussed.

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PDF-file: 22 pages; size: 9.6 Mbytes

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  • Presented at: 32nd EPS Conference on Plasma Physics, Tarragona, Spain, Jun 26 - Jul 01, 2005

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  • Report No.: UCRL-CONF-214524
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 877908
  • Archival Resource Key: ark:/67531/metadc879733

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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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  • June 17, 2005

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  • Sept. 21, 2016, 2:29 a.m.

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  • Dec. 9, 2016, 9:20 p.m.

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Dewald, E L; Glenzer, S H; Landen, O L; Suter, L J; Jones, O S; Schein, J et al. First Laser-Plasma Interaction and Hohlraum Experiments on NIF, article, June 17, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc879733/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.