Bryntrn: A Baryon transport model

John W. Wilson, Lawrence W. Townsend, John E. Nealy, Sang Y. Chun, B. S. Hong, Warren W. Buck, S. L. Lamkin, Barry D. Ganapol, Ferdous Khan, Francis A. Cucinotta

Research output: Chapter in Book/Report/Conference proceedingChapter

81 Scopus citations


This report describes the development of an interaction data base and a numerical solution to the transport of baryons through an arbitrary shield material based on a straight ahead approximation of the Boltzmann equation. The code is most accurate for continuous-energy boundary values but gives reasonable results for discrete spectra at the boundary using even a relatively coarse energy grid (30 points) and large spatial increments (1 cm in H2O). The resulting computer code is self-contained, efficient, and easy to use. The code requires only a very small fraction of the computer resources required for Monte Carlo codes.

Original languageEnglish (US)
Title of host publicationNASA Technical Paper
StatePublished - Mar 1989
Externally publishedYes

ASJC Scopus subject areas

  • Aerospace Engineering


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