title: Galactic cosmic ray transport methods:  past, present, and future.
abstract: The development of the theory of high charge and energy (HZE) ion transport is reviewed.  The basic solution behavior and approximation techniques will be described.  An overview of the HZE transport codes currently available at the Langley Research Center will be given.  The near term goal of the Langley program is to produce a complete set of one-dimensional transport codes.  The ultimate goal is to produce a set of complete three-dimensional codes which have been validated in the laboratory and can be applied in the engineering design environment.   Recent progress toward completing these goals is discussed.
authors.affiliation: NASA Langley Research Center, Hampton, VA 23681, USA.
authors.forename: J W
authors.initials: JW
authors.lastname: Wilson
authors.forename: L W
authors.initials: LW
authors.lastname: Townsend
authors.forename: J L
authors.initials: JL
authors.lastname: Shinn
authors.forename: F A
authors.initials: FA
authors.lastname: Cucinotta
authors.forename: R C
authors.initials: RC
authors.lastname: Costen
authors.forename: F F
authors.initials: FF
authors.lastname: Badavi
authors.forename: S L
authors.initials: SL
authors.lastname: Lamkin
mesh_terms: D003198:Computer Simulation / Q000639:trends*; D003359:Cosmic Radiation; D008433:Mathematics; D008962:Models, Theoretical; D009686:Nuclear Physics; D011835:Radiation Protection; D012542:Scattering, Radiation