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14.61 The Transmission_polarisatorABSnT McStas Component
Transmission V-polarisator including absorption by Fe in the supermirror.
Identification
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Author: Andreas Ostermann
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Origin: TUM
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Date: 2004
Description
Transmission V-polarisator including absorption by Fe in the supermirror.
Example: Gravity_guide(w1=0.1, h1=0.1, w2=0.1, h2=0.1, l=12,
R0=0.99, Qc=0.021, alpha=6.07, m=1.0, W=0.003, k=1, d=0.0005)
Example: Transmission_polarisatorABSnT(w1=0.050, h1=0.050,
w2=0.050, h2=0.050, l=2.700, waferD=0.0003, FeD=2.16e-06, Si_i=0.2, Si_a=0.215, R0=0.99, Qc=0.02174, alpha=4.25, W=0.001,
mleft=1.2, mright=1.2, mtop=1.2, mbottom=1.2,
R0_up=0.99, Qc_up=0.014, alpha_up=2.25, W_up=0.0025, mup=1.0,
R0_down=0.99, Qc_down=0.02174, alpha_down=3.8, W_down=0.00235, mdown=2.5)
Input parameters
Parameters in boldface are required; the others are optional.
|
Name |
Unit |
Description |
Default |
|
|
|||
|
w1 |
m |
Width at the polarizer entry |
|
|
h1 |
m |
Height at the polarizer entry |
|
|
w2 |
m |
Width at the polarizer exit |
|
|
h2 |
m |
Height at the polarizer exit |
|
|
l |
m |
length of polarizer |
|
|
waferD |
m |
Thickness of Si wafer |
|
|
Si_i |
barns |
Scattering cross section per atom (barns) |
|
|
Si_a |
barns |
Absorption cross section per atom (barns) at 2200m/s |
|
|
FeD |
m |
Thickness of Fe wafer |
|
|
R0 |
1 |
Low-angle reflectivity of the outer guide |
0.99 |
|
Qc |
Å\(^{-1}\) |
Critical scattering vector of the outer guide |
0.02174 |
|
alpha |
Å |
Slope of reflectivity of the outer guide |
4.25 |
|
W |
Å\(^{-1}\) |
Width of supermirror cut-off of the outer guide |
0.001 |
|
R0_up |
1 |
Low-angle reflectivity of the Fe/Si-wafer for spin up neutrons |
0.99 |
|
Qc_up |
Å\(^{-1}\) |
Critical scattering vector of the Fe/Si-wafer for spin up neutrons |
0.0109 |
|
alpha_up |
Å |
Slope of reflectivity of the Fe/Si-wafer for spin up neutrons |
4.25 |
|
W_up |
Å\(^{-1}\) |
Width of supermirror cut-off of the Fe/Si-wafer for spin up neutrons |
0.0025 |
|
R0_down |
1 |
Low-angle reflectivity of the Fe/Si-wafer for spin down neutrons |
0.99 |
|
Qc_down |
Å\(^{-1}\) |
Critical scattering vector of the Fe/Si-wafer for spin down neutrons |
0.02174 |
|
alpha_down |
Å |
Slope of reflectivity of the Fe/Si-wafer for spin down neutrons |
6.25 |
|
W_down |
Å\(^{-1}\) |
Width of supermirror cut-off of the Fe/Si-wafer for spin down neutrons |
0.001 |
|
mleft |
1 |
m-value of material for left. vert. mirror of the outer guide |
-1 |
|
mright |
1 |
m-value of material for right. vert. mirror of the outer guide |
-1 |
|
mtop |
1 |
m-value of material for top. horz. mirror of the outer guide |
-1 |
|
mbottom |
1 |
m-value of material for bottom. horz. mirror of the outer guide |
-1 |
|
mup |
1 |
m-value of the Fe/Si-wafer for spin up neutrons |
-1 |
|
mdown |
1 |
m-value of the Fe/Si-wafer for spin down neutrons |
-1 |
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Links
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Component source code found in file Transmission_polarisatorABSnT.comp.
