LASNEX modeling of target expansion in the ETA-II experiment

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We have used the hydrodynamics code LASNEX to model the hydro-expansion of the tantalum target for the ETA-II experiment. The electron beam has kinetic energy of 6 MeV and has a total energy ranges from 720 to 1440 J. The electron beam profile resembles that of a Bennett pinch. The radius for the full-width-at-half-maximum ranges from 1 to 3 mm. For all these parameters, simulations show that the electron beam is able to ablate the central portion of the target. The expansion velocity of the target ranges from about 10� to 5 x 105 cm/s. The target is hot enough ... continued below

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963 Kilobytes

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Ho, D D-M May 20, 1998.

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We have used the hydrodynamics code LASNEX to model the hydro-expansion of the tantalum target for the ETA-II experiment. The electron beam has kinetic energy of 6 MeV and has a total energy ranges from 720 to 1440 J. The electron beam profile resembles that of a Bennett pinch. The radius for the full-width-at-half-maximum ranges from 1 to 3 mm. For all these parameters, simulations show that the electron beam is able to ablate the central portion of the target. The expansion velocity of the target ranges from about 10� to 5 x 105 cm/s. The target is hot enough so that the surrounding low-density air is ionized and is expanding at a considerably higher velocity than the target itself. Therefore, care must be taken during the experiment to ensure that the measurement is for the tantalum and not for the ionized air.

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963 Kilobytes

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  • Other: DE00003022
  • Report No.: UCRL-ID-131125
  • Grant Number: W-7405-Eng-48
  • DOI: 10.2172/3022 | External Link
  • Office of Scientific & Technical Information Report Number: 3022
  • Archival Resource Key: ark:/67531/metadc674896

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  • May 20, 1998

Added to The UNT Digital Library

  • July 25, 2015, 2:20 a.m.

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  • May 6, 2016, 10:51 p.m.

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Ho, D D-M. LASNEX modeling of target expansion in the ETA-II experiment, report, May 20, 1998; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc674896/: accessed October 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.