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Content

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Data

  • exp=sxrx22915:run=104
  • Camp.0:pnCCD.1
  • /reg/d/psdm/sxr/sxrx22915/calib/PNCCD::CalibV1/Camp.0:pnCCD.1/
  • all plots for event 10

Raw image

Pedestals

Gain

Corrected data

raw - pedestal

Raw-pedestals daq array: DAQ shape is (4,512,512). Raw data is re-shaped as (4*512, 512), 2048 rows and 512 columns

The same array combined in image using geometry

/reg/d/psdm/sxr/sxrx22915/calib/PNCCD::CalibV1/Camp.0:pnCCD.1/geometry/0-end.data

image is shaped as (1027, 1273) rows,cols:

 

Rows and columns in ASICS have the same direction as in image, although some ASICS in image may be combined upside-down.

raw - pedestal - cm in rows (512 pixels in median)

raw - pedestal - cm in rows (512) and columns (512)

Gain map is not applied

Standard Detector correction (128 in rows)

Summary

  • Image for raw data has horizontal and vertical stripes
  • pedestals and gain, averaged for many images (common mode is averaged to zero), have vertical strips ONLY!
  • So, common mode effect gives strong contribution in rows (horizantal strips)
  • Median algorithms gives bands in image depending on regions of image brightness

References

 

 

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