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10.18 The Template_process McXtrace Component
Template for a new contributor to create their own physical process.
Identification
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Author: Mads Bertelsen and Erik B Knudsen
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Origin: ESS DMSC & DTU Physics
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Date: 20.08.15
Description
This is a template for a new contributor to create their own physical process. The comments in this file are meant to teach the user about creating their own process file, rather than explaining this one. For comments on how this code works, look in the Incoherent_process.comp.
Part of the Union components, a set of components that work together and thus sperates 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 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.
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Name |
Unit |
Description |
Default |
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sigma |
barns |
Scattering cross section |
5.08 |
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packing_factor |
1 |
Material packing factor |
1 |
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unit_cell_volume |
Å\(^{3}\) |
Unit cell volume |
13.8 |
|
interact_fraction |
1 |
How large a part of the scattering events should use this process 0-1 (sum of all processes in material = 1) |
-1 |
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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. OUTPUT PARAMETERS: Template_storage // Important to update this output paramter effective_my_scattering // Variable used in initialize |
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Links
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Component source code found in file Template_process.comp.
