Target designs for energetics experiments on the National Ignition Facility

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The goal of the first hohlraum energetics experiments on the National Ignition Facility (NIF) [G. H. Miller et al , Optical Eng. 43, 2841 (2004)] is to select the hohlraum design for the first ignition experiments. Sub-scale hohlraums heated by 96 of the 192 laser beams on the NIF are used to emulate the laser-plasma interaction behavior of ignition hohlraums. These ''plasma emulator'' targets are 70% scale versions of the 1.05 MJ, 300 eV ignition hohlraum and have the same energy-density as the full-scale ignition designs. Radiation-hydrodynamics simulations show that the sub-scale target is a good emulator of plasma conditions ... continued below

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6 p. (0.2 MB)

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Meezan, N B; Glenzer, S H & Suter, L J August 31, 2007.

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The goal of the first hohlraum energetics experiments on the National Ignition Facility (NIF) [G. H. Miller et al , Optical Eng. 43, 2841 (2004)] is to select the hohlraum design for the first ignition experiments. Sub-scale hohlraums heated by 96 of the 192 laser beams on the NIF are used to emulate the laser-plasma interaction behavior of ignition hohlraums. These ''plasma emulator'' targets are 70% scale versions of the 1.05 MJ, 300 eV ignition hohlraum and have the same energy-density as the full-scale ignition designs. Radiation-hydrodynamics simulations show that the sub-scale target is a good emulator of plasma conditions inside the ignition hohlraum, reproducing density ne within 10% and temperature Te within 15% along a laser beam path. Linear backscatter gain analysis shows the backscatter risk to be comparable to that of the ignition target. A successful energetics campaign will allow the National Ignition Campaign to focus its efforts on optimizing ignition hohlraums with efficient laser coupling.

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6 p. (0.2 MB)

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  • Presented at: Fifth International Conference on Inertial Fusion Sciences and Applications, Kobe, Japan, Sep 09 - Sep 14, 2007

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  • Report No.: UCRL-CONF-234387
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 922118
  • Archival Resource Key: ark:/67531/metadc898290

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  • August 31, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • April 17, 2017, 12:14 p.m.

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Meezan, N B; Glenzer, S H & Suter, L J. Target designs for energetics experiments on the National Ignition Facility, article, August 31, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc898290/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.