The `Union_logger_2DQ` Component

A sample component to separate geometry and phsysics

Identification

Site:
Author: Mads Bertelsen
Origin: University of Copenhagen
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 scattering vector, q 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
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"
Q_direction_1	string	Q direction for first axis ("x", "y" or "z")	"x"
Q1_min	1	histogram boundery, min q value for first axis	-5
Q1_max	1	histogram boundery, max q value for first axis	5
n1	1	number of bins for first axis	90
Q_direction_2	string	Q direction for second axis ("x", "y" or "z")	"z"
Q2_min	1	histogram boundery, min q value for second axis	-5
Q2_max	1	histogram boundery, max q value for second axis	5
n2	1	number of bins for second axis	90
filename	string	Filename for logging output	"NULL"
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

AT (	,	,		) RELATIVE
ROTATED (	,	,		) RELATIVE

The Union_logger_2DQ Component

Identification

Description

Input parameters

Links

The `Union_logger_2DQ` Component