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12.32 The Union_logger_2D_kf McStas Component
Two dimensional logger of final wavevector for Union components
Identification
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Author: Mads Bertelsen
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Origin: University of Copenhagen
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Date: 20.08.15
Description
Part of the Union components, a set of components that work together and thus sperates geometry and physics within McStas. The use of this component requires other components to be used.
1) One specifies a number of processes using process components 2) These are gathered into material definitions using Union_make_material 3) Geometries are placed using Union_box/cylinder/sphere, assigned a material 4) A Union_master component placed after all of the above
Only in step 4 will any simulation happen, and per default all geometries defined before this master, but after the previous will be simulated here.
There is a dedicated manual available for the Union_components
This logger logs a 2D projection of the final wavevector after each scattering in the lab frame.
A logger will log something for scattering events happening to certain volumes, which are specified in the target_geometry string. By leaving it blank, all geometries are logged, even the ones not defined at this point in the instrument file. If a list og target_geometries is selected, one can further narrow the events logged by providing a list of process names in target_process which need to correspond with names of defined Union_process components.
To use the logger_conditional_extend function, set it to some integer value n and make and extend section to the master component that runs the geometry. In this extend function, logger_conditional_extend[n] is 1 if the conditional stack evaluated to true, 0 if not. This way one can check what rays is logged using regular McStas monitors. Only works if a conditional is applied to this logger.
Input parameters
Parameters in boldface are required; the others are optional.
|
Name |
Unit |
Description |
Default |
|
|
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|
target_geometry |
string |
Comma seperated list of geometry names that will be logged, leave empty for all volumes (even not defined yet) |
"NULL" |
|
target_process |
string |
Comma seperated names of physical processes, if volumes are selected, one can select Union_process names |
"NULL" |
|
Q1_min |
Å\(^{-1}\) |
Histogram boundery, min kf value for first axis |
-5 |
|
Q1_max |
Å\(^{-1}\) |
Histogram boundery, max kf value for first axis |
5 |
|
Q2_min |
Å\(^{-1}\) |
Histogram boundery, min kf value for second axis |
-5 |
|
Q2_max |
Å\(^{-1}\) |
Histogram boundery, max kf value for second axis |
5 |
|
Q_direction_1 |
string |
kf direction for first axis ("x", "y" or "z") |
"x" |
|
Q_direction_2 |
string |
kf direction for second axis ("x", "y" or "z") |
"z" |
|
filename |
string |
Filename of produced data file |
"NULL" |
|
n1 |
1 |
Number of bins for first axis |
90 |
|
n2 |
1 |
Number of bins for second axis |
90 |
|
order_total |
1 |
Only log rays that scatter for the n’th time, 0 for all orders |
0 |
|
order_volume |
1 |
Only log rays that scatter for the n’th time in the same geometry |
0 |
|
order_volume_process |
1 |
Only log rays that scatter for the n’th time in the same geometry, using the same process |
0 |
|
logger_conditional_extend_index |
1 |
If a conditional is used with this logger, the result of each conditional calculation can be made available in extend as a array called "logger_conditional_extend", and one would then acces logger_conditional_extend[n] if logger_conditional_extend_index is set to n |
-1 |
|
nowritefile |
1 |
If set, logger will skip writing to disk |
0 |
|
init |
string |
Deprecated and unused. Accepted so that instruments written for McStas/McXtrace 3.8.7 and earlier, which name the Union_init component here, still compile. |
"" |
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Links
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Component source code found in file Union_logger_2D_kf.comp.
