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SHIELDOSE 2
SHIELDOSE is a model for spaceshielding radiation dose calculations. It determines the absorbed dose as a function of depth in aluminum shielding material of spacecraft, given the electron and proton fluences encountered in orbit. It makes use of precalculated, monoenergetic depthdose data for an isotropic, broadbeam fluence of radiation incident on uniform aluminum plane media. These precalculated values are the result of detailed electron and electronbremsstrahlung Monte Carlo calculations. The SHIELDOSE model has been developed by NASA. SHIELDOSE is a program for spaceshielding radiation dose calculations. It determines the absorbed dose as a function of depth in aluminum shielding material of spacecraft, given the electron and proton fluences encountered in orbit. The code makes use of precalculated, monoenergetic depthdose data for an isotropic, broadbeam fluence of radiation incident on uniform aluminum plane media. These precalculated values are the result of detailed electron and electronbremsstrahlung Monte Carlo calculations. The present version of SHIELDOSE calculates, for arbitrary proton and electron incident spectra, the dose absorbed in small volumes of the detector materials Al, H_{2}O (tissueequivalent detector), Si, and SiO_{2}, in the following aluminum shield geometries: (1) in a semiinfinite plane medium, as a function of depth; (2) at the transmission surface of a plane slab, as a function of slab thickness; and (3) at the center of a solid sphere, as a function of sphere radius. At launch the program will request the name of the input file. It is obligatory to name input file with INP extension, for example AP8.INP. The input file must contain all of required information. Information is the set of records delimited by spaces of carriage return symbols. The first two records are names of the two output files. It's obligatory to give OUT and ARR extension to these files. Example: Next the index of the detector type is specified, for example '1'.
The next number indicates the nuclear interaction account, for example 1:
The next number indicates shielding depth, for example '17'.After that comes the index of the shielding depth unit:
The next set of records are the shieldings in the same units as in the previous point. The next pair of numbers is about solar protons, the min and max energy of solar protons spectrum, default values are 0.1 and 10000 MeV. The next pair of numbers is about trapped protons, the min and max energy of trapped protons spectrum, default values are 0.1 and 10000 MeV. The next number is the number of spectrum points which divides spectrum for integration. Default value is 1001. The next pair of numbers is about trapped electrons, the min and max energy of trapped electrons spectrum, default values are 0.05 and 10 MeV and number of spectrum points. Default value is 1001. The next 72symbol line can contain arbitrary text information for example the information about falling particles and detector type. The next number is the number of points in falling spectrum of solar protons, trapped protons and trapped electrons.After that the unit for conversation of flux. If your flux is in 1/(cm^{2} s keV), this unit is 1000. If your flux is 1/(cm^{2} s MeV), this unit is 1. Source files says: "EUNIT IS CONVERSION FACTOR FROM /ENERGY TO /MEV, E.G., EUNIT = 1000 IF FLUX IS /KEV.". The next number is time of dose accumulation in seconds. Default value is 3.15360E+07  year; you can indicate 86400  one day. The next numbers are spectra. If the spectrum of solar protons contans nonzero points the energies in MeV are shown. After that the fluxes are shown. After that the trapped proton spectrum and trapped electron spectrum in the condition of nonzero points number of spectrum. After the program exits the OUT file will be created. 



Developed in 2007. Copyright © 2007  2020 Skobeltsyn Institute of Nuclear Physics Moscow State University Feedback 