[ Identification | Description | Input parameters | Output parameters | Links ]

The Guide_wavy Component

Neutron guide with gaussian waviness.

Identification

Description

Models a rectangular guide tube centered on the Z axis. The entrance lies
in the X-Y plane.
For details on the geometry calculation see the description in the McStas
reference manual.

Example values: m=2 Qc=0.0218 (nat. Ni) W=1/300 alpha=4.38 R0=0.995
                (given by Daniel Clemens, PSI)

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
w1 m Width at the guide entry  
h1 m Height at the guide entry  
w2 m Width at the guide exit  
h2 m Height at the guide exit  
l m length of guide  
R0 1 Low-angle reflectivity  
Qc AA-1 Critical scattering vector  
alpha1 AA Slope of reflectivity  
m1 1 m-value of material, left  
W1 AA-1 Width of supermirror cut-off  
alpha2 AA Slope of reflectivity  
m2 1 m-value of material, right.  
W2 AA-1 Width of supermirror cut-off  
alpha3 AA Slope of reflectivity  
m3 1 m-value of material, top.  
W3 AA-1 Width of supermirror cut-off  
alpha4 AA Slope of reflectivity  
m4 1 m-value of material, bottom.  
W4 AA-1 Width of supermirror cut-off  
wavy_z  
wavy_xy  

Output parameters

Name Unit Description Default
whalf  
hhalf  
lwhalf  
lhhalf  
norm_nv  
norm_nh  
f_h  
f_v  
eta_z  
eta_xy  

Links


[ Identification | Description | Input parameters | Output parameters | Links ]

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Feb 28 2006