Difference between revisions of "Calibration"
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The calibration file corrects each of the 12 detectors for 2theta zero shift, wavelength, and scaling factor. | 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. | Calibration files are obtained from a 12-histogram GSAS refinement of data collected on a powder sample containing a mixture of NIST SRM 676a Al2O3 (~75 wt%) & SRM 640d Si (~25 wt%). | ||
=== Calibration Scan Parameters === | === Calibration Scan Parameters === | ||
'''At 30 keV''' - the standard calibration scan parameters currently are as follows: | |||
*2theta start: -17 deg | *2theta start: -17 deg | ||
Revision as of 17:24, 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 676a Al2O3 (~75 wt%) & SRM 640d Si (~25 wt%).
Calibration Scan Parameters
At 30 keV - the standard calibration scan parameters currently are as follows:
- 2theta start: -17 deg
- 2theta end: 50 deg
- step size: 0.0005 deg
- count time: 0.01 sec/step
Generating Calibration Files
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