[ Identification | Description | Input parameters | Links ]

The AF_HB_1D_process Component

Identification

• Site:
• Author: Mads Bertelsen
• Origin:
• 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 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
atom_distance	AA	distance between atom's in chain	1
number_density	1/AA^3	Number of scatteres per volume	0
unit_cell_volume	AA^3	Unit cell volume (set either unit_cell_volume or number density)	0
A_constant	unitless	constant from Müller paper 1981, probably somewhere between 1 and 1.5	1
J_interaction	meV	Exchange constant	1
packing_factor	1	Material packing factor	1
interact_fraction	1	Fraction of rays that should be forced to interact	-1

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

Links

• Source code for AF_HB_1D_process.comp.

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[ Identification | Description | Input parameters | Links ]

Generated on 2025-05-08 13:31:31

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Last Modified: Thursday, 08-May-2025 13:32:08 CEST