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

The FermiChopper Component

Fermi Chopper with rotating frame.

Identification

Description

Models a fermi chopper with optional supermirror coated blades
supermirror facilities may be disabled by setting m = 0, R0=0

Example:
FermiChopper(dist=58, rad=0.04, nu=100,
  ymin=-0.04, ymax=0.04, w=0.00022475, Nslit=200.0, R0=0.0,
  Qc=0.02176, alpham=2.33, m=0.0, Wi=2e-3, Vi=Vi,  slit=0.012)
 
Markus Poehlmann     
Christian Carbogno   
and Helmut Schober    

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
dist m Distance(chopper-source)  
rad m chopper cylinder radius  
nu Hz chopper frequency  
ymin  
ymax  
w  
Nslit  
alpham AA Slope of reflectivity  
Qc AA-1 Critical scattering vector  
m 1 m-value of material. Zero means completely absorbing.  
Wi AA-1 Width of supermirror cut-off  
R0 1 Low-angle reflectivity  
Vi m/s velocity of prototype neutron  
slit m Length of the short blades  

Output parameters

Name Unit Description Default
cylinder  
cylinder2  
Treffer  
interactiol  
interactior  
reflect  
seccountl  
seccountr  
intpolcountl  
intpolcountr  
errcountl  
errcountr  
infinite  
breakedl  
breakedr  
nout  
topbot  
nn  
ntrans  

Links


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

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