A space radiation application is developed based on Geant4 tool kit. Even though there are many space radiation applications like MULASSIS (MUlti-LAyered Shielding SImulation Software); the application developed here offers more flexibility in choosing the physical models. It can be used to analyze the spherical geometries directly in addition to the planar geometries. In this paper both planar and spherical geometries of aluminum (Al), polyethylene (CH2) and liquid hydrogen (lH2) materials are analyzed with the help of dose-depth curves. The hydrogen, helium and Fe particle spectra of Galactic Cosmic Radiation (GCR) radiation are used in the estimation of doses. The total equivalent doses for the periods of 1 Yr are evaluated for aluminum, polyethylene and liquid hydrogen materials respectively and the liquid hydrogen is found to be more effective shielding material. These doses are compared to NCRP 2000 (National Council on Radiation Protection and Measurements) career dose limits to analyze the radiation risk for astronauts. The doses in case of planar geometries are well below the career limits of male as well female astronauts of age 35Yrs but those that in case of spherical geometries are well above the career limits for female astronauts of the same age. Doses for spherical geometries are below the career limits of male astronauts of same age only when areal densities of shield materials reach 100g/cm2. The dose in spherical geometry is found to be ~4.4 times to that of planar geometry when Al material of 10 g/cm2 is exposed to GCR hydrogen spectrum. This is in agreement with the estimations of previous studies. The effect of geometry on the dose levels received by astronauts is also analyzed. It is found that the reduction in dose is about 10% more in spherical geometry than in planar geometry of the Al material. This is observed when the Al material is exposed to GCR hydrogen spectrum and its thickness is varied from 10 g/cm2 to 120 g/cm2.
| Published in | Advances in Applied Sciences (Volume 2, Issue 6) |
| DOI | 10.11648/j.aas.20170206.13 |
| Page(s) | 110-114 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2017. Published by Science Publishing Group |
Space Radiation, Geant4, Solar Energetic Particles, Galactic Cosmic Rays, Dose, Equivalent Dose
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| [7] | F. Lei, P. R. Truscott, C. S. Dyer et al. MULASSIS: A Geant4-based Multilayered Shielding Simulation Tool, IEEE Transactions on Nuclear Science, 49(6) (2002) 2788 - 2793. |
| [8] | SPENVIS. https://www.spenvis.oma.be/ |
| [9] | Allan J. Tylka, James H. Adams, Jr., Paul R. Boberg, et al., CRÈME 96: A revision of the Cosmic Ray Effects on Micro-Electronics Code, IEEE Transactions on Nuclear Science, 44(6) (1997) 2150-2160. |
| [10] | CRÈME –MC. https://creme.isde.vanderbilt.edu |
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APA Style
V. Satya Prakash. (2017). Geant4 Based Space Radiation Application for Planar and Spherical Geometries. Advances in Applied Sciences, 2(6), 110-114. https://doi.org/10.11648/j.aas.20170206.13
ACS Style
V. Satya Prakash. Geant4 Based Space Radiation Application for Planar and Spherical Geometries. Adv. Appl. Sci. 2017, 2(6), 110-114. doi: 10.11648/j.aas.20170206.13
AMA Style
V. Satya Prakash. Geant4 Based Space Radiation Application for Planar and Spherical Geometries. Adv Appl Sci. 2017;2(6):110-114. doi: 10.11648/j.aas.20170206.13
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Download@article{10.11648/j.aas.20170206.13,
author = {V. Satya Prakash},
title = {Geant4 Based Space Radiation Application for Planar and Spherical Geometries},
journal = {Advances in Applied Sciences},
volume = {2},
number = {6},
pages = {110-114},
doi = {10.11648/j.aas.20170206.13},
url = {https://doi.org/10.11648/j.aas.20170206.13},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.aas.20170206.13},
abstract = {A space radiation application is developed based on Geant4 tool kit. Even though there are many space radiation applications like MULASSIS (MUlti-LAyered Shielding SImulation Software); the application developed here offers more flexibility in choosing the physical models. It can be used to analyze the spherical geometries directly in addition to the planar geometries. In this paper both planar and spherical geometries of aluminum (Al), polyethylene (CH2) and liquid hydrogen (lH2) materials are analyzed with the help of dose-depth curves. The hydrogen, helium and Fe particle spectra of Galactic Cosmic Radiation (GCR) radiation are used in the estimation of doses. The total equivalent doses for the periods of 1 Yr are evaluated for aluminum, polyethylene and liquid hydrogen materials respectively and the liquid hydrogen is found to be more effective shielding material. These doses are compared to NCRP 2000 (National Council on Radiation Protection and Measurements) career dose limits to analyze the radiation risk for astronauts. The doses in case of planar geometries are well below the career limits of male as well female astronauts of age 35Yrs but those that in case of spherical geometries are well above the career limits for female astronauts of the same age. Doses for spherical geometries are below the career limits of male astronauts of same age only when areal densities of shield materials reach 100g/cm2. The dose in spherical geometry is found to be ~4.4 times to that of planar geometry when Al material of 10 g/cm2 is exposed to GCR hydrogen spectrum. This is in agreement with the estimations of previous studies. The effect of geometry on the dose levels received by astronauts is also analyzed. It is found that the reduction in dose is about 10% more in spherical geometry than in planar geometry of the Al material. This is observed when the Al material is exposed to GCR hydrogen spectrum and its thickness is varied from 10 g/cm2 to 120 g/cm2.},
year = {2017}
}
TY - JOUR T1 - Geant4 Based Space Radiation Application for Planar and Spherical Geometries AU - V. Satya Prakash Y1 - 2017/12/18 PY - 2017 N1 - https://doi.org/10.11648/j.aas.20170206.13 DO - 10.11648/j.aas.20170206.13 T2 - Advances in Applied Sciences JF - Advances in Applied Sciences JO - Advances in Applied Sciences SP - 110 EP - 114 PB - Science Publishing Group SN - 2575-1514 UR - https://doi.org/10.11648/j.aas.20170206.13 AB - A space radiation application is developed based on Geant4 tool kit. Even though there are many space radiation applications like MULASSIS (MUlti-LAyered Shielding SImulation Software); the application developed here offers more flexibility in choosing the physical models. It can be used to analyze the spherical geometries directly in addition to the planar geometries. In this paper both planar and spherical geometries of aluminum (Al), polyethylene (CH2) and liquid hydrogen (lH2) materials are analyzed with the help of dose-depth curves. The hydrogen, helium and Fe particle spectra of Galactic Cosmic Radiation (GCR) radiation are used in the estimation of doses. The total equivalent doses for the periods of 1 Yr are evaluated for aluminum, polyethylene and liquid hydrogen materials respectively and the liquid hydrogen is found to be more effective shielding material. These doses are compared to NCRP 2000 (National Council on Radiation Protection and Measurements) career dose limits to analyze the radiation risk for astronauts. The doses in case of planar geometries are well below the career limits of male as well female astronauts of age 35Yrs but those that in case of spherical geometries are well above the career limits for female astronauts of the same age. Doses for spherical geometries are below the career limits of male astronauts of same age only when areal densities of shield materials reach 100g/cm2. The dose in spherical geometry is found to be ~4.4 times to that of planar geometry when Al material of 10 g/cm2 is exposed to GCR hydrogen spectrum. This is in agreement with the estimations of previous studies. The effect of geometry on the dose levels received by astronauts is also analyzed. It is found that the reduction in dose is about 10% more in spherical geometry than in planar geometry of the Al material. This is observed when the Al material is exposed to GCR hydrogen spectrum and its thickness is varied from 10 g/cm2 to 120 g/cm2. VL - 2 IS - 6 ER -
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