[ Identification | Description | Input parameters | Links ]

# The `Non_process` Component

This process dos nothing and is used for testing

## Identification

- Site:
- Author: Mads Bertelsen
- Origin: ESS DMSC
- Date: 20.08.15

## Description

    This process dos nothing and is used for testing

    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 like this one
    2) These are gathered into material definitions using Union_make_material
    3) Geometries are placed using Union_box / Union_cylinder, 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 |
sigma | barns | Scattering cross section | 5.08 |
packing_factor |  |  | 1 |
unit_cell_volume | AA^3 | Unit cell volume | 13.8 |
interact_fraction |  |  | -1 |
init |  |  | "init" |

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

## Links

- Source code for `Non_process.comp`.

[ Identification | Description | Input parameters | Links ]