The `Template_surface` Component

A template process for building Union surface processes

Identification

Author: Mads Bertelsen
Origin: University of Copenhagen
Date: 20.08.15

Description

This is a template for a new contributor to create their own surface process.
The comments in this file are meant to teach the user about creating their own
surface component, rather than explaining this one. For comments on how this
code works, look in the Mirror_surface.comp.
To add a new surface process, three changes are needed in union-lib.h:
Add entry in surface enum (match your process)
Add a pointer to your storage struct in surface_data_transfer_union
Add an empty UNION_CASE_PHYSICS_SURFACE_ default and list it in
UNION_CASES_PHYSICS_SURFACE; your SHARE section then defines the case

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
reflect	str	Name of reflectivity file. Format q(Angs-1) R(0-1)	0
R0	1	Low-angle reflectivity	0.99
Qc	AA^-1	Critical scattering vector	0.0219
alpha	AA	Slope of reflectivity	6.07
m	1	m-value of material. Zero means completely absorbing.	2
W	AA^-1	Width of supermirror cut-off	0.003
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
ROTATED (	,	,		) RELATIVE

The Template_surface Component

Identification

Description

Input parameters

Links

The `Template_surface` Component