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10.4 The L_monitor McStas Component
Wavelength-sensitive monitor.
Identification
-
Author: Kristian Nielsen and Kim Lefmann
-
Origin: Risoe
-
Date: April 20, 1998
Description
A square single monitor that measures the wavelength of the incoming neutrons.
Example: L_monitor(xmin=-0.1, xmax=0.1, ymin=-0.1, ymax=0.1, nL=20, filename="Output.L", Lmin=2, Lmax=10)
Input parameters
Parameters in boldface are required; the others are optional.
|
Name |
Unit |
Description |
Default |
|
|
|||
|
nL |
1 |
Number of wavelength channels |
20 |
|
filename |
string |
Name of file in which to store the detector image |
0 |
|
nowritefile |
1 |
If set, monitor will skip writing to disk |
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 |
|
Lmin |
Å |
Minimum wavelength to detect |
|
|
Lmax |
Å |
Maximum wavelength to detect |
|
|
restore_neutron |
1 |
If set, the monitor does not influence the neutron state |
0 |
|
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Links
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Component source code found in file L_monitor.comp.
The wavelength sensitive monitor
The component L_monitor is very similar to TOF_monitor and E_monitor. This component is just sensitive to the neutron wavelength. The wavelength spectrum is output in a one-dimensional histogram. between \(\lambda _\textrm {min}\) and \(\lambda _\textrm {max}\) (measured in Å).
As for the two other 1-dimensional monitors, this component outputs the total counts and a file with the histogram.
