McXtrace - An X-ray ray-trace simulation package

[ Identification | Description | Input parameters | Links ]

The Union_make_material Component

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

Identification

• Author: Mads Bertelsen and Erik B Knudsen
• Origin: ESS DMSC & DTU Physics
• Date: 20.08.15

Description

Part of the Union components, a set of components that work together and thus
separates geometry and physics within McXtrace.
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
material_string	string	List of elements present in the material. Triggers a search for materials constants files.	"NULL"
init	string	Deprecated and unused. Accepted so that instruments written for McStas/McXtrace 3.8.7 and earlier, which name the Union_init component here, still compile.	""

AT (	,	,		) RELATIVE		Generate to clipboard
ROTATED (	,	,		) RELATIVE

Links

• Source code for Union_make_material.comp.

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[ Identification | Description | Examples | Input parameters | Links ]

Generated on mcxtrace 3.10.2

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Last Modified: Monday, 02-Nov-2026 21:43:07 CET