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

The Guide_channeled Component

Neutron guide with channels (bender section).

Identification

Description

Models a rectangular guide tube centered on the Z axis. The entrance lies
in the X-Y plane.
The guide may be tapered, and may have vertical subdivisions (used for
bender devices).

Example: Guide_channeled(w1=0.1, h1=0.1, w2=0.1, h2=0.1, l=2.0,
 R0=0.99, Qcx=0.0219, Qcy=0.0219, alphax=6.07, alphay=6.07, W=0.003, k=1,
d=0.0005, mx=1, my=1)

%BUGS
This component does not work with gravitation on. Use Guide_gravity.
This component does not work in multichannel focusing geometry.

Example values: mx=4 my=2 Qcx=Qcy=0.0219 W=1/300 alphax=alphay=6.49 R0=1

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 0.99
Qcx AA-1 Critical scattering vector for left and right vertical mirrors in each channel 0.021
Qcy AA-1 Critical scattering vector for top and bottom mirrors 0.021
alphax AA Slope of reflectivity for left and right vertical mirrors in each channel 6.07
alphay AA Slope of reflectivity for top and bottom mirrors 6.07
W AA-1 Width of supermirror cut-off for all mirrors 0.003
k 1 Number of channels in the guide (>= 1) 1
d m Thickness of subdividing walls 0.0005
mx 1 m-value of material for left and right vertical mirrors in each channel. Zero means completely absorbing. 1
my 1 m-value of material for top and bottom mirrors. Zero means completely absorbing. 1

Output parameters

Name Unit Description Default
w1c  
w2c  
ww  
hh  
whalf  
hhalf  
lwhalf  
lhhalf  

Links

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

Generated automatically by McDoc, Peter Willendrup <peter.willendrup@risoe.dk> / Fri May 11 08:41:08 2012