ResearchSupplementary Data
This is where we make supplementary materials from our publications publicly available. Journals often limit the number of supplementary files authors may submit with their articles. Published articles are listed below with a description of each relevant supplementary file.
The Fission Fragment Rocket Engine for Mars Fast Transit
John Gahl, Andrew K. Gillespie, Cuikun Lin, R.V. Duncan. arXiv:2308.01441 (2023)
Input file: UO2-Layer.i
A simple input file used to simulate neutrons incident on a slab of uranium oxide. 14-MeV neutrons were incident on a layer of uranium oxide. The simulation tracked heavy ions generated to estimate the percentage that escaped as a function of the thickness of the uranium oxide layer. We have only included one input file here, but if anyone wishes to repeat this simulation, the thickness can be changed by editing surface card #301. This input file contains a few extra vacuum cells that we had used to track a more complicated set of simulations; they have no bearing on the results presented in this publication.
To create figure 1 in this article, we looked at: (1) the total number of heavy ions created, (2) the population in the UO2 layer, and (3) the population that escaped that layer.
Photoneutron Yield for an Electron Beam on Tantalum and Erbium Deuteride
Andrew K. Gillespie, Cuikun Lin, R.V. Duncan. arXiv:2308.02629 (2023). Published in Nuclear Engineering and Technology (2024).
Input file 1: Tantalum-Only
A simple input file used to simulate the electron beam incident on a tantalum layer. Surface cell #403 may be edited to change the thickness of the tantalum layer.
Input file 2: Ta-ErD3-Layers
A simple input file used to simulate the 10-MeV electron beam incident on a tantalum layer followed by a layer of erbium deuteride. The tantalum layer may be included or deleted to reproduce all the data in figure 7 of the article. The tantalum thickness was kept constant at 0.15 cm, and surface cell #401 may be edited to change the thickness of the erbium deuteride layer.
Simulating Radiation Shielding Effectiveness Against Three Neutron Sources
Andrew K. Gillespie, Cuikun Lin, Matthew Looney, R.V. Duncan. arXiv:2309.15125 (2023)
Input file 1: Warehouse, shielding slabs, and person zones
A point source inside the warehouse with three tally zones representing locations of an operator near the source. This is close to a realistic model of the shielding and size of a person; however, the F4 tally requires many histories to pass all the statistical checks. The instances of “NewVariableA” and “NewVarB” were used as variables for submitting batch jobs to the high performance computing center. As an example, use 110 and 220 for these variables, respectively. The thin layer of polyethylene was included to contain the water, and its dimensions were kept constant for each iteration of the simulation.
Input file 2: Warehouse, cylindrical shielding, and cylindrical shell tally zones
A simplified model that helps calculate the equivalent dose in a similar manner to the first input file: a point source surrounded by a cylindrical shell of shielding material and another cylindrical tally zone representing the distance from the source to an operator. This model was run with a sufficient number of histories to pass all statistical checks for the F4 tally, and it matches the more realistic model for shielding thicknesses of interest. The instance of “NewVariableA” was used as a variable for submitting batch jobs to the high performance computing center; as an example, use 110 for this variable. The thin layer of polyethylene was included to contain the water, and its dimensions were kept constant for each iteration of the simulation.