An Improved Charged Particle Model in CALEICF
Abstract
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 12%. The thermal energy and the parameters of the distribution can be calculated using ({sigma}{nu}) and itsmore »
 Authors:
 Publication Date:
 Research Org.:
 Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
 Sponsoring Org.:
 USDOE
 OSTI Identifier:
 900089
 Report Number(s):
 UCRLCONF227316
TRN: US0702163
 DOE Contract Number:
 W7405ENG48
 Resource Type:
 Conference
 Resource Relation:
 Conference: Presented at: Nuclear Explosives Code Developers Conference 2006, Los Alamos, NM, United States, Oct 23  Oct 27, 2006
 Country of Publication:
 United States
 Language:
 English
 Subject:
 45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; APPROXIMATIONS; ASYMMETRY; CHARGED PARTICLES; DISTRIBUTION; ELECTRONS; ENERGY SPECTRA; FUNCTIONALS; NUCLEAR EXPLOSIVES; PERFORMANCE; SIMULATION; STATISTICS; THERMONUCLEAR REACTIONS
Citation Formats
Managan, R A. An Improved Charged Particle Model in CALEICF. United States: N. p., 2007.
Web.
Managan, R A. An Improved Charged Particle Model in CALEICF. United States.
Managan, R A. Wed .
"An Improved Charged Particle Model in CALEICF". United States.
doi:. https://www.osti.gov/servlets/purl/900089.
@article{osti_900089,
title = {An Improved Charged Particle Model in CALEICF},
author = {Managan, R A},
abstractNote = {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 12%. 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 10 00:00:00 EST 2007},
month = {Wed Jan 10 00:00:00 EST 2007}
}

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