Somewhere at the end of the data processing we found that geometry of cspad is not well tuned; peaks on the right- and left-hand side of the image are not symmetric. Geometry file which we used so far came from cpo; it was processed by goptimizer and converted back to "psana" format. Then there is a rumor that current version of goptimizer has a bug which gives 2x1 segment offset of a few pixels.
Use optical measurements from 2015-01-20
Archive: /reg/g/psdm/detector/alignment/cspad/calib-cxi-camera2-2015-01-20/ Start tuning using geometry file: calib/CsPad::CalibV1/CxiDs2.0:Cspad.0/geometry/geo-cxif5315-r0169-swap-tuned.data Work files in: /reg/g/psdm/detector/alignment/cspad/calib-cxi-camera2-2015-01-20/2015-11-06-cxif5315-geo-tuning/ |
Geometry was re-tuned using application geo
, final file in archive is
lysozime, data peaks, data ceramic rings
lysozime with old geometry file geo-cxif5315-r0169-swap-tuned.data
Images show that current geometry is truly tuned with precision approx. 1 pixel.