[ Identification | Description | Input parameters | Links ]

The Exact_radial_coll Component

An exact radial Soller collimator.

Identification

• Site:
• Author: Roland Schedler
• Origin: HMI
• Date: October 2006

Description

Radial Soller collimator with rectangular opening, specified length and
specified foil thickness.
The collimator is made of many trapezium shaped nslit stacked radially.
The nslit are separated by absorbing foils, the whole stuff is inside
an absorbing housing.
The component should be positioned at the radius center. The model is exact.
The neutron beam outside the collimator area is transmitted unaffected.

Example: Exact_radial_coll(theta_min=-5, theta_max=5, nslit=100,
radius=1.0, length=.3, h_in=.2, h_out=.3, d=0.0001)

Input parameters

Parameters in boldface are required; the others are optional.

Name	Unit	Description	Default
theta_min	deg	Minimum Theta angle for the radial setting	-5
theta_max	deg	Maximum Theta angle for the radial setting	5
nslit	1	Number of channels in the theta range	100
radius	m	Inner radius (focus point to foil start point).	1.0
length	m	Length of the foils / collimator	.5
h_in	m	Input window height	.3
h_out	m	Output window height	.4
d	m	Thickness of the absorbing foils	0.0001
verbose	0/1	Gives additional information	0

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

Links

• Source code for Exact_radial_coll.comp.

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[ Identification | Description | Input parameters | Links ]

Generated on mcstas 3.5.32

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Last Modified: Monday, 30-Jun-2025 11:05:10 CEST