Difference between revisions of "Calibration"
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The standard calibration scan parameters are: | The standard calibration scan parameters are: | ||
*2theta start: -17 deg | |||
2theta end: 50 deg | *2theta end: 50 deg | ||
step size: 0.0005 deg | *step size: 0.0005 deg | ||
count time: 0.01 sec/step'' | *count time: 0.01 sec/step'' | ||
Revision as of 16:55, 23 June 2010
A calibration file is needed to merge data collected from each of 11-BM 12 detectors into a single 2theta vs intensity dataset.
The calibration file corrects each of the 12 detectors for 2theta zero shift, wavelength, and scaling factor.
Calibration files are obtained from a 12-histogram GSAS refinement of data collected on a powder sample containing a mixture of NIST SRM Al2O3 & Si.
The standard calibration scan parameters are:
- 2theta start: -17 deg
- 2theta end: 50 deg
- step size: 0.0005 deg
- count time: 0.01 sec/step
The robot system (aka Snookums) can access 56 samples mounted on individual posts plus 6 magazines of 16 samples each. A diagram for viewing showing the numbering is found here.
