The `Union_box` Component

A sample component to separate geometry and phsysics

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
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 Union_make_material
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 this master, but after the previous will be simulated here.

There is a dedicated manual available for the Union components

The position of this component is the center of the box, zdepth/2 in each direction.

It is allowed to overlap components, but it is not allowed to have two
parallel planes that coincides. This will crash the code on run time.


Algorithm:
Described elsewhere

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
material_string		material name of this volume, defined using Union_make_material	0
priority	1	priotiry of the volume (can not be the same as another volume) A high priority is on top of low.
xwidth	m	width of the box volume
yheight	m	height of the box volume
zdepth	m	depth of the box volume
xwidth2	m	optional different width at the +z box face	-1
yheight2	m	optional different height at the +z box face	-1
visualize	1	set to 0 if you wish to hide this geometry in mcdisplay	1
target_index	1	Relative index of component to focus at, e.g. next is +1	0
target_x	m		0
target_y	m	Position of target to focus at	0
target_z	m		0
focus_aw	deg	horiz. angular dimension of a rectangular area	0
focus_ah	deg	vert. angular dimension of a rectangular area	0
focus_xw	m	horiz. dimension of a rectangular area	0
focus_xh	m	vert. dimension of a rectangular area	0
focus_r	m	focusing on circle with this radius	0
p_interact	1	probability to interact with this geometry [0-1]	0
mask_string		Comma seperated list of geometry names which this geometry should mask	0
mask_setting		"All" or "Any", should the masked volume be simulated when the ray is in just one mask, or all.	0
number_of_activations	1	Number of subsequent Union_master components that will simulate this geometry	1

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

The Union_box Component

Identification

Description

Input parameters

Links

The `Union_box` Component