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There is a set of predefined materials for use in elements such as collimators, e.g.
“Air” | “LiquidHelium”
|
“Aluminium” | “NbTi”
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“BeamGasPlugMat” | “Niobium”
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“Beryllium” | “Silicon”
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“CarbonMonoxide” | “SmCo”
|
“CarbonSteel” | “Soil”
|
“Concrete” | “Titanium”
|
“Copper” | “TitaniumAlloy”
|
“Graphite” | “Tungsten”
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“Invar” | “Vacuum”
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“Iron” | “Vanadium”
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“LaserVac” | “Water”
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“Lead” | “WeightIron”
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“LeadTungstate”
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Currently “Air”, “CarbonMonoxide” and “Vacuum” are gas at T=300K, p=10^-12 bar: both “Air” and “Vacuum” are a N(80):O(20) mixture, “CarbonMonoxide is composed of CO molecules.
There are also predefined elements (i.e. atoms) that can be used for building composite materials: "H", "He", "Be", "C" , "N", "O", "Al", "Si", "P" , "S", "Ca", "Ti", “V" , "Mn", "Fe", "Co", "Ni", "Cu", "Nb", "Sm", "W" , "Pb".
For more details see the file src/BDSMaterials.cc
or run the command
bdsim --materials
from the command line.