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14.91 The SANS_DebyeS McStas Component
Sample for Small Angle Neutron Scattering, Debye-Scherrer Ring
Identification
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Author: Henrich Frielinghaus
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Origin: FZ-Juelich/FRJ-2/IFF/KWS-2
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Date: Sept 2004
Description
Debye-Scherrer Ring: Model for highly ordered diblock copolymer. This example is highly simple. Multiple scattering neglected, but could be incorporated. Sample that only produces a DebyeSherrer ring. Advantages: Transmitted beam is simulated. Intensities still in flux units. Minor point: Absolute scattering probability given by transmission.
Sample components leave the units of flux for the probability of the individual paths. That is more consitent than the Sans_spheres routine. Furthermore one can simulate the transmitted beam. This allows to determine the needed size of the beam stop. Only absorption has not been included yet to these sample-components. But thats really nothing.
Example: SANS_DebyeS(transm=0.5, qDS=0.008, xwidth=0.01, yheight=0.01, zdepth=0.001)
Input parameters
Parameters in boldface are required; the others are optional.
|
Name |
Unit |
Description |
Default |
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|
transm |
1 |
coherent transmission of sample for the optical path "zdepth" |
0.5 |
|
qDS |
Å\(^{-1}\) |
Scattering vector of Debye-Sherrer ring |
0.008 |
|
xwidth |
m |
horiz. dimension of sample, as a width (m) |
0.01 |
|
yheight |
m |
vert.. dimension of sample, as a height (m) |
0.01 |
|
zdepth |
m |
thickness of sample (m) |
0.001 |
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Links
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Component source code found in file SANS_DebyeS.comp.
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Sans_spheres component
