Component Manual for the Neutron Ray-Tracing Package McStas, version 3.8.6

12.10  The Union_cone McStas Component

Cone geometry component for Union components

Identification

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 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 cone, and it thus extends yheight/2 up and down along y axis.

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.

Input parameters

Parameters in boldface are required; the others are optional.

Name

Unit

Description

Default

material_string

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.

radius

m

Radius volume in (x,z) plane

0

radius_top

m

Top radius volume in (x,z) plane

0

radius_bottom

m

Bottom radius volume in (x,z) plane

0

yheight

m

Cone height in (y) direction

visualize

1

Set to 0 if you wish to hide this geometry in mcdisplay

1

target_index

1

Focuses on component a component this many steps further in the component sequence

0

target_x

m

X position of target to focus at

0

target_y

m

Y position of target to focus at

0

target_z

m

Z position of target to focus at

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

string

Comma seperated list of geometry names which this geometry should mask

0

mask_setting

string

"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

curved_surface

string

Comma seperated string of Union surface definitions defined prior to this component, applied to curved wall of cone

0

top_surface

string

Comma seperated string of Union surface definitions defined prior to this component, applied to +y top face of cone

0

bottom_surface

string

Comma seperated string of Union surface definitions defined prior to this component, applied to -y bottom face of cone

0

all_face_surface

string

Comma seperated string of Union surface definitions defined prior to this component, applied to all faces above

0

cut_surface

string

Comma seperated string of Union surface definitions defined prior to this component, applied to all internal cuts

0

init

string

Name of Union_init component (typically "init", default)

"init"

Links