Publications

Bossler, Kerry B.; Valdez, Greg D.

Abstract not provided.

Bossler, Kerry B.; Valdez, Greg D.

Abstract not provided.

Franke, Brian C.; Kensek, Ronald P.; Laub, Thomas W.; Crawford, Martin J.; Bohnhoff, William J.; Valdez, Greg D.; Bossler, Kerry B.; Olson, Aaron J.

Abstract not provided.

Bossler, Kerry B.; Valdez, Greg D.

Abstract not provided.

Agelastos, Anthony M.; Pase, Douglas M.; Amspaugh, Kathleen A.; Dinge, Dennis D.; Haskell, Karen H.; Ice, Lisa I.; Lamb, Justin M.; Shaw, Ryan P.; Stevenson, Joel O.; Brunini, Victor B.; Clausen, Jonathan C.; Crawford, Martin J.; Valdez, Greg D.; Klundt, Ruth A.; Monk, Stephen T.; Ogden, Jeffry B.

Abstract not provided.

Drumm, Clifton R.; Bohnhoff, William J.; Fan, Wesley C.; Pautz, Shawn D.; Valdez, Greg D.

This report provides a summary of notes for building and running the Sandia Computational Engine for Particle Transport for Radiation Effects (SCEPTRE) code. SCEPTRE is a general purpose C++ code for solving the Boltzmann transport equation in serial or parallel using unstructured spatial finite elements, multigroup energy treatment, and a variety of angular treatments including discrete ordinates and spherical harmonics. Either the first-order form of the Boltzmann equation or one of the second-order forms may be solved. SCEPTRE requires a small number of open-source Third Party Libraries (TPL) to be available, and example scripts for building these TPL's are provided. The TPL's needed by SCEPTRE are Trilinos, boost, and netcdf. SCEPTRE uses an autoconf build system, and a sample configure script is provided. Running the SCEPTRE code requires that the user provide a spatial finite-elements mesh in Exodus format and a cross section library in a format that will be described. SCEPTRE uses an xml-based input, and several examples will be provided.

Franke, Brian C.; Laub, Thomas W.; Kensek, Ronald P.; Crawford, Martin J.; Valdez, Greg D.

Abstract not provided.

Drumm, Clifton R.; Bohnhoff, William J.; Fan, Wesley C.; Pautz, Shawn D.; Valdez, Greg D.

This report provides a summary of notes for building and running the Sandia Computational Engine for Particle Transport for Radiation Effects (SCEPTRE) code. SCEPTRE is a general purpose C++ code for solving the Boltzmann transport equation in serial or parallel using unstructured spatial finite elements, multigroup energy treatment, and a variety of angular treatments including discrete ordinates. Either the first-order form of the Boltzmann equation or one of the second-order forms may be solved. SCEPTRE requires a small number of open-source Third Party Libraries (TPL) to be available, and example scripts for building these TPL’s are provided. The TPL’s needed by SCEPTRE are Trilinos, boost, and netcdf. SCEPTRE uses an autoconf build system, and a sample configure script is provided. Running the SCEPTRE code requires that the user provide a spatial finite-elements mesh in Exodus format and a cross section library in a format that will be described. SCEPTRE uses an xml-based input, and several examples will be provided.

Laub, Thomas W.; Kensek, Ronald P.; Franke, Brian C.; Valdez, Greg D.

Abstract not provided.

Drumm, Clifton R.; Pautz, Shawn D.; Fan, Wesley C.; Bohnhoff, William J.; Valdez, Greg D.

Abstract not provided.

Kensek, Ronald P.; Franke, Brian C.; Valdez, Greg D.

Abstract not provided.

Franke, Brian C.; Franke, Brian C.; Kensek, Ronald P.; Laub, Thomas W.; Lorence, Leonard L.; Fan, Wesley C.; Valdez, Greg D.; Mehlhorn, Thomas A.

ITS is a powerful and user-friendly software package permitting state of the art Monte Carlo solution of linear time-independent couple electron/photon radiation transport problems, with or without the presence of macroscopic electric and magnetic fields of arbitrary spatial dependence. Our goal has been to simultaneously maximize operational simplicity and physical accuracy. Through a set of preprocessor directives, the user selects one of the many ITS codes. The ease with which the makefile system is applied combines with an input scheme based on order-independent descriptive keywords that makes maximum use of defaults and internal error checking to provide experimentalists and theorists alike with a method for the routine but rigorous solution of sophisticated radiation transport problems. Physical rigor is provided by employing accurate cross sections, sampling distributions, and physical models for describing the production and transport of the electron/photon cascade from 1.0 GeV down to 1.0 keV. The availability of source code permits the more sophisticated user to tailor the codes to specific applications and to extend the capabilities of the codes to more complex applications. Version 5.0, the latest version of ITS, contains (1) improvements to the ITS 3.0 continuous-energy codes, (2)multigroup codes with adjoint transport capabilities, and (3) parallel implementations of all ITS codes. Moreover the general user friendliness of the software has been enhanced through increased internal error checking and improved code portability.