3.9. - Scan Macros
The following sections summarize the usage of the standard scans in spec. This discussion is followed by a description of macros to customize the scan output sent to the printer and data file. Refer 3.12 for a detailed discussion of a single-motor scan.
All the scans use the same basic invocation syntax. For example, the single motor, absolute-position scan is invoked as
ascan motor start finish intervals timeThe range of a scan is specified by the starting position
start,
the
final position
finish
and the number of intervals
intervals
of the scanned parameters.
Thus
ascan tth 26 28 20 60would start with the
tth motor at 26°, and
move the motor to 28°, using 20 intervals of 0.1°.
The total number of points scanned is one more than the number of intervals,
in this case, 21 points.
The time per point
time,
if a positive number, indicates counting to
seconds.
In the above example, each point takes 60 seconds.
Using a negative
time indicates counting to monitor counts.
- 3.9.1. - Scan Miscellany
3.9.2. - Motor Scans
3.9.3. - Basic Reciprocal Space Scans
3.9.4. - Special Reciprocal Space Scans
3.9.5. - Temperature Scans
3.9.6. - Powder Mode
3.9.7. - Customizing Scan Output