An Improved Charged Particle Model in CALEICF

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Modeling ICF capsules and test problems involving thermonuclear plasmas requires modeling the charged particles produced by the thermonuclear reactions. The charged particles escaping from an ICF capsule are one of the main diagnostics of capsule performance. Caleicf can locally deposit the charged particle energy into the electron and ion fields instantaneously or track them using a Monte Carlo algorithm. Test problems revealed that Caleicf's charged particle package needed improvement. The package has been enhanced to include the thermal energy of the reacting particles and to model the created particles energy distribution. The thermal energy of the reacting particles is accounted ... continued below

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12 p. (0.5 MB)

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Managan, R A January 10, 2007.

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Modeling ICF capsules and test problems involving thermonuclear plasmas requires modeling the charged particles produced by the thermonuclear reactions. The charged particles escaping from an ICF capsule are one of the main diagnostics of capsule performance. Caleicf can locally deposit the charged particle energy into the electron and ion fields instantaneously or track them using a Monte Carlo algorithm. Test problems revealed that Caleicf's charged particle package needed improvement. The package has been enhanced to include the thermal energy of the reacting particles and to model the created particles energy distribution. The thermal energy of the reacting particles is accounted for as described in Ballabio, et al. [Ballabio et al., 1998] and Warshaw [Warshaw, 2001] . This energy is removed from the background ion energy and distributed between the created particles. The particle energy distributions are modeled with an approximation used by Ballabio, et al. This distribution is a modified Gaussian (based on the square root of the energy) that has a functional form similar to the exact distribution (see Warshaw). The skewness of the distribution matches that of the exact distribution within 1-2%. The thermal energy and the parameters of the distribution can be calculated using ({sigma}{nu}) and its first two derivatives with respect to temperature. The new model will be compared with the original one for several test problems and ICF calculations.

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12 p. (0.5 MB)

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PDF-file: 12 pages; size: 0.5 Mbytes

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  • Presented at: Nuclear Explosives Code Developers Conference 2006, Los Alamos, NM, United States, Oct 23 - Oct 27, 2006

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  • Report No.: UCRL-CONF-227316
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 900089
  • Archival Resource Key: ark:/67531/metadc891453

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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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  • January 10, 2007

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • April 13, 2017, 3:44 p.m.

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Managan, R A. An Improved Charged Particle Model in CALEICF, article, January 10, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc891453/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.