The `Union_make_material` Component

Component that takes a number of Union processes and constructs a Union material

Identification

Site:
Author: Mads Bertelsen
Origin: University of Copenhagen
Date: 20.08.15

Description

Part of the Union components, a set of components that work together and thus
sperates 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

Input parameters

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/cm3	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	AA^-2	Scattering length density of material (overwrites sigma_coh, density and weight)	-1500
init	string	Name of Union_init component (typically "init", default)	"init"

AT (	,	,		) RELATIVE
ROTATED (	,	,		) RELATIVE

The Union_make_material Component

Identification

Description

Input parameters

Links

The `Union_make_material` Component