Page History

...

• averaged over all 14636 events calibrated (pedestal, common mode) data 
  
• polarization correction factor 
  
• polarization-corrected data
  
• radial-background subtracted data using single angular bin
  
  This image indicates on in-correct geometry; background center consistent with beam intersection does not coincide with detector origin (0,0). 
• radial-background subtracted data using 8 angular bins
  

• dynamically apply some geometry correction

  Code Block
  geo = GeometryAccess(fname_geo) geo.move_geo('CSPAD:V1', 0, 1600, 0, 0) geo.move_geo('QUAD:V1', 2, -100, 0, 0)

  and plot again radial-background subtracted data using single angular bin
  
  we get that "dish"-like shape disappears.

• Interpolation (linear) between centers of the background bins could also help:

  Code Block
  bkgd = rb.bkgd_nda_interpol(nda, method='linear') # method='nearest' 'cubic' cdata = rb.subtract_interpol(nda, method='linear')

  Interpolation for entire detector and for part of the image:

   

  Image is not as impressive as for polarization-corrected sample, but the residual intensity spread shrink down to RMS~3 ADU.

• Subtraction of single Single angular bin interpolated background, data from exp=cxij4915:run=25
  Image Removedand its subtraction from data:
  Image AddedImage Added

CSPAD "dopping" artifacts

...