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See this page: https://confluence.slac.stanford.edu/display/ppareg/ePix10K+Calibration

Per panel calibration constants

Algorithm

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for xtc data with charge injection processing is developed by Gabriel and is wrapped in psana environment as CLI

Detector/app/epix10ka_offset_calibration

Similarly, dark run processing script is

Detector/app/epix10ka_pedestals_calibration

These commands will be available in releases > ana-1.3.58. See description using option "-h", e.g.

epix10ka_offset_calibration -h

File naming for panel calibration repository

/reg/g/psdm/detector/gains/epix10k/panels/ - path to repository

File with aliases for long panel ids: /reg/g/psdm/detector/gains/epix10k/panels/aliases.txt

Sub-directory for particular panel id:

/reg/g/psdm/detector/gains/epix10k/panels/3791847426-0170080513-1879048214-0191557724-0003673288-2996154369-0218103833/

Sub-directories  for each panel

  • offset
  • pedestals
  • plots
  • work
  • gain # content will be provided by Philip

Panel calibration file name: epix10ka_0001_20180514120622_mfxx32516_r1021_pedestals_AHL-H.dat, where

  • epix10ka - detector type
  • 0001 - panel id alias as specified in /reg/g/psdm/detector/gains/epix10k/panels/aliases.txt
  • 20180514120622 - run start time stamp
  • mfxx32516_r1021 - experiment and run for production of this constants
  • pedestals - constants type
  • AHL-H - gain range (mode)

File with already processed arrays is saved as

.../work/epix10ka_0001_20180514120622_mfxx32516_r1021_e1107_spacing02-df.npz, with extra fields in name,

e1107_spacing02 - experiment number and injection mode spacing.

  • per event make <uint8 control bit array>
  • convert to <array of indexes> using <control bits table>
  • generate <array of gains> and <array of offsets>
  • apply correction using formula

Constants production

Detector/examples/ex_epix10ka_merge_constants.py - generates files ./epix10k-gain(offset).txt(npy) for single segment shape (7, 1, 352, 384)

 

Deployed with calibman as

/reg/d/psdm/MFX/mfxx32516/calib/Epix10ka::CalibV1/MfxEndstation.0:Epix10ka.0/pixel_gain/0-end.data

/reg/d/psdm/MFX/mfxx32516/calib/Epix10ka::CalibV1/MfxEndstation.0:Epix10ka.0/pixel_offset/0-end.data

 

Pedestal Deployment Meeting Notes (8/2/18)

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e1107_spacing02