[ Identification | Description | Input parameters | Links ]

# 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 |
init | string | Name of Union_init component (typically "init", default) | "init" |

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

## Links

- Source code for `Union_make_material.comp`.

[ Identification | Description | Input parameters | Links ]