[ Identification | Description | Input parameters | Links ]

# The `Transmission_polarisatorABSnT` Component

Transmission V-polarisator including absorption by Fe in the supermirror.

## Identification

- Site:
- Author: Andreas Ostermann
- Origin: TUM
- 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 | AA-1 | Critical scattering vector of the outer guide | 0.02174 |
alpha | AA | Slope of reflectivity of the outer guide | 4.25 |
W | AA-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 | AA-1 | Critical scattering vector of the Fe/Si-wafer for spin up neutrons | 0.0109 |
alpha_up | AA | Slope of reflectivity of the Fe/Si-wafer for spin up neutrons | 4.25 |
W_up | AA-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 | AA-1 | Critical scattering vector of the Fe/Si-wafer for spin down neutrons | 0.02174 |
alpha_down | AA | Slope of reflectivity of the Fe/Si-wafer for spin down neutrons | 6.25 |
W_down | AA-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 |

AT ( | , | , |  | ) RELATIVE |  |
ROTATED ( | , | , |  | ) RELATIVE |

## Links

- Source code for `Transmission_polarisatorABSnT.comp`.

[ Identification | Description | Input parameters | Links ]