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| cen.mac | ||||||
| [ source code | installed at | configured at ] | ||||||
| See other macros in category: Scans Obsolete | ||||||
Description:
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Documentation:
This macro set is OBSOLETE. Kept here as example This set of macros will try to find the center of a reflection in the angle sequence specified by the user. It will do a scan in the first angle, go to the center of the peak found, do a scan in the next angle, and so on. Initially it takes a user supplied scan width, but after the first cycle, it adjusts the scan width depending on FWHM found. The sequence is repeated until either convergence or a max number of cycles is found. This routine can be used in conjunction with the SEARCH routine, either directly inside, or from the search results file. EXAMPLE
cen_seq
Defines the centering sequence - Angle names and convergence criteria
Angle number 1
Name?: [ 0 to end]: (0)? th
Give data for: th
Initial scan width: (1)? 1.5
Initial scan step size: (0)? .1
Minimum step size: (0)? 0.05
Max shift to define convergence: (0)? 0.02
Recenter if already converged (NO)? YES
Angle number 2
Name?: [ 0 to end]: (0)? chi
Give data for: chi
Initial scan width: (3)? 6
Initial scan step size: (0)? .25
Minimum step size: (0)? .2
Max shift to define convergence: (0)? .05
Recenter if already converged (NO)? YES
Angle number 3
Name?: [ 0 to end]: (0)? 0
2 angles in sequence - th chi
cen_here
The centering will start from the current angles.
ATTENTION DEPENDENCIES - The file cen.mac has to be read in (qdo'd) !done by: startup script | ||||||
Macros:
Usage: cen_seq You will be ask the filename for results and other general paramters (see cen_par ). For every angle you like to center you have to answer the following questions: cen_here Usage: cen_here This initiates the centering algorithm from current angles\n") | ||||||
| Internal Macros: | ||||||
Usage: cen_do_it This routine does the real centering cen_what_next Usage: cen_what_next decides whether to give up (maxc < CENMINC), scan further, or prepares the next angles. cen_scan Usage: cen_scan <center-angle-index> cen_par Usage: cen_par
Number of points in the scan : 15
Maximum number of cycles allowed :5
Initial counting time in secs :1
Max permitted counting time :10 (not implemented yet)
Minimum counts to define a peak :200 (better will be a peak/bkgd ratio)
cen_defaults Usage: cen_defaults Sets defaults for angles to write, output format ,... This is done in this way to allow other macros to use the centering for more general scans (like beamline alignment) cen_mv Usage: cen_mv does the moving in the centering - uses the BESTANG array cen_savetofile Usage: cen_savetofile This macro saves the results to a file. This has been separated to allow other macro sets to redefine it. | ||||||
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