Component that takes a number of Union processes and constructs a Union material
Author: Mads Bertelsen
Origin: University of Copenhagen
Date: 20.08.15
Part of the Union components, a set of components that work together and thus separates geometry and physics within McStas. The use of this component requires other components to be used.
1) One specifies a number of processes using process components 2) These are gathered into material definitions using this component 3) Geometries are placed using Union_box/cylinder/sphere, assigned a material 4) A Union_master component placed after all of the above
Only in step 4 will any simulation happen, and per default all geometries defined before the master, but after the previous will be simulated here.
There is a dedicated manual available for the Union_components
Algorithm: Described elsewhere
Parameters in boldface are required; the others are optional.
|
Name |
Unit |
Description |
Default |
|
|
|||
|
process_string |
string |
Comma seperated names of physical processes |
"NULL" |
|
my_absorption |
1/m |
Inverse penetration depth from absorption at standard energy |
|
|
absorber |
0/1 |
Control parameter, if set to 1 the material will have no scattering processes |
0 |
|
refraction_density |
g/cm\(^{3}\) |
Density of the refracting material. density < 0 means the material is outside/before the shape. |
0 |
|
refraction_sigma_coh |
barn |
Coherent cross section of refracting material. Use negative value to indicate a negative coherent scattering length |
0 |
|
refraction_weight |
g/mol |
Molar mass of the refracting material |
0 |
|
refraction_SLD |
Å\(^{-2}\) |
Scattering length density of material (overwrites sigma_coh, density and weight) |
-1500 |
|
init |
string |
Name of Union_init component (typically "init", default) |
"init" |
|
|
|||
|
|
|||
|
|
|||
Component source code found in file Union_make_material.comp.