Direct drive heavy-ion-beam inertial fusion at high coupling efficiency

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Issues with coupling efficiency, beam illumination symmetry, and Rayleigh-Taylor instability are discussed for spherical heavy-ion-beam-driven targets with and without hohlraums. Efficient coupling of heavy-ion beams to compress direct-drive inertial fusion targets without hohlraums is found to require ion range increasing several-fold during the drive pulse. One-dimensional implosion calculations using the LASNEX inertial confinement fusion target physics code shows the ion range increasing fourfold during the drive pulse to keep ion energy deposition following closely behind the imploding ablation front, resulting in high coupling efficiencies (shell kinetic energy/incident beam energy of 16% to 18%). Ways to increase beam ion range while ... continued below

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Logan, B.G.; Perkins, L.J. & Barnard, J.J. May 16, 2008.

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Issues with coupling efficiency, beam illumination symmetry, and Rayleigh-Taylor instability are discussed for spherical heavy-ion-beam-driven targets with and without hohlraums. Efficient coupling of heavy-ion beams to compress direct-drive inertial fusion targets without hohlraums is found to require ion range increasing several-fold during the drive pulse. One-dimensional implosion calculations using the LASNEX inertial confinement fusion target physics code shows the ion range increasing fourfold during the drive pulse to keep ion energy deposition following closely behind the imploding ablation front, resulting in high coupling efficiencies (shell kinetic energy/incident beam energy of 16% to 18%). Ways to increase beam ion range while mitigating Rayleigh-Taylor instabilities are discussed for future work.

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  • APS-DPP, Dallas, TX, November 17-22, 2008; Related Information: Journal Publication Date: 2008

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  • Report No.: LBNL-1195E
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 942147
  • Archival Resource Key: ark:/67531/metadc898528

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  • May 16, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Oct. 28, 2016, 7:10 p.m.

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Logan, B.G.; Perkins, L.J. & Barnard, J.J. Direct drive heavy-ion-beam inertial fusion at high coupling efficiency, article, May 16, 2008; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc898528/: accessed May 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.