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McXtrace - An X-ray ray-trace simulation package

ESRF; SAXSLAB Niels Bohr Institute DTU Physics



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McXtrace: Divergence_monitor Component

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

The Divergence_monitor Component

Based on neutron component by Kim Lefmann Horizontal+vertical divergence monitor.


  • Author: Erik B Knudsen
  • Origin: DTU Physics
  • Date: Jun. '16
  • Version: $Revision$


A divergence sensitive monitor. The counts are distributed in
(n times m) pixels.

Example: Divergence_monitor(nh=20, nv=20, filename="Output.pos",
          xmin=-0.1, xmax=0.1, ymin=-0.1, ymax=0.1,
          maxdiv_h=2, maxdiv_v=2)

Input parameters

Parameters in boldface are required; the others are optional.
Name Unit Description Default
nh 1 Number of pixel rows 20
nv 1 Number of pixel columns 20
rad 1 If set - divergence will be measured in radians. 0
filename 0
xmin m Lower x bound of detector opening -0.05
xmax m Upper x bound of detector opening 0.05
ymin m Lower y bound of detector opening -0.05
ymax m Upper y bound of detector opening 0.05
xwidth m Width of detector. Overrides xmin, xmax 0
yheight m Height of detector. Overrides ymin, ymax 0
maxdiv_h degrees Maximal horizontal divergence detected 1
maxdiv_v degrees Maximal vertical divergence detected 1
restore_xray 1 If set, the monitor does not influence the photon state 0
nx 0
ny 1 Vector definition of "forward" direction wrt. divergence, to be used e.g. when the monitor is rotated into the horizontal plane 0
nz 1
nowritefile 1 If set, monitor will skip writing to disk 0

Output parameters

Name Unit Description Default
Div_N - Array of photon ray counts  
Div_p - Array of photon weight counts  
Div_p2 - Array of second moments  


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

Generated automatically by McDoc, Peter Willendrup <> / Mon Aug 16 15:54:47 2021

Last Modified: Monday, 16-Aug-2021 17:54:47 CEST
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