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14.40 The Filter_graphite McStas Component
Pyrolytic graphite filter (analytical model)
Identification
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Author: <a href="mailto:hansen@ill.fr">Thomas C Hansen</a>
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Origin: <a href="http://www.ill.fr">ILL</a>
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Date: 07 March 2000
Description
ESCRIPTION
This rectangular pyrolytic graphite filter uses an analytical model with linear interpolation on the neutron wavelength This type of filter is e.g. used to supress higher harmonics, such as the 1.2 Å contribution to the 2.4 Å obtained by a highly oriented pyrolytic graphite (HOPG) monochromator.
Example: Filter_graphite(xmin=-.05, xmax=.05, ymin=-.05, ymax=.05, length=1.0)
Input parameters
Parameters in boldface are required; the others are optional.
|
Name |
Unit |
Description |
Default |
|
|
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|
xmin |
m |
Lower x bound |
-0.16 |
|
xmax |
m |
Upper x bound |
0.16 |
|
ymin |
m |
Lower y bound |
-0.16 |
|
ymax |
m |
Upper y bound |
0.16 |
|
length |
m |
Thickness of graphite plate |
0.05 |
|
xwidth |
m |
Width of filter. Overrides xmin,xmax. |
0 |
|
yheight |
m |
Height of filter. Overrides ymin,ymax. |
0 |
|
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Links
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Component source code found in file Filter_graphite.comp.
