PPT Slide
Crysfire Self Calibration Bragg-Bretano Data
- Sometimes it’s hard to be sure how far the beam is penetrating into the sample, giving an unknown sample-displacement error
- This can be addressed by trying self-calibration (SC)
- If indexing the uncorrected data has failed, try SC
- Select T (for specimen-displacement correction ratio)
- A list of candidates for T will be displayed, based on 1st/2nd-order line pairs
- If a particular ratio comes up several times and looks plausible, adopt it
- Save it (SA) in Crysfire format under a new name, so that it can be reloaded
- Do another cycle of indexing runs, this time with the “corrected” data