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  • Dark Run: 169, rear sensors gain 1/64, front 1/1, Imaging mode                                  exp=amoa1214:run=169
  • Run With Hits:  170  Low hit rate though, so you will have to use a hit finder of sorts   exp=amoa1214:run=170

Calibration

...

of pnCCD

New modules for "old-style" calibration:

  • pdscalibdata/include/PnccdBaseV1.h                   - baseclass for pnCCD parameters, defines Segs, Rows, Cols, Size
  • pdscalibdata/include/PnccdPedestalsV1.h          -  loads pedestals from file, returns ndarray of pedestals
  • pdscalibdata/include/PnccdCommonModeV1.h  -  the same for common mode
  • pdscalibdata/include/PnccdPixelGainV1.h            - the same for pixel gain
  • pdscalibdata/include/PnccdPixelStatusV1.h         - the same for pixel status
  • PSCalib::PnccdCalibPars                                       - wrapper for all pnCCD types

...

PSCalib/test/ex_calib_file_finder.cpp:

Code Block
// Assume that file is located in /reg/d/psdm/AMO/amotut13/calib/PNCCD::CalibV1/Camp.0:pnCCD.1/pedestals/1-end.data

  const std::string calibDir   = "/reg/d/psdm/AMO/amotut13/calib";
  const std::string groupName  = "PNCCD::CalibV1";
  const std::string source     = "Camp.0:pnCCD.1";
  unsigned long     runNumber  = 10;
  unsigned          print_bits = 255;

  PSCalib::PnccdCalibPars *calibpars = new PSCalib::PnccdCalibPars(calibDir, groupName, source, runNumber, print_bits);  

  calibpars->printCalibPars();
  calibpars->printCalibParsStatus();
  calibpars->printInputPars();

  ndarray<pdscalibdata::PnccdPedestalsV1::pars_t, 3>   peds = calibpars -> pedestals();
  ndarray<pdscalibdata::PnccdCommonModeV1::pars_t, 1>  cmod = calibpars -> common_mode();
  ndarray<pdscalibdata::PnccdPixelStatusV1::pars_t, 3> stat = calibpars -> pixel_status();
  ndarray<pdscalibdata::PnccdPixelGainV1::pars_t, 3>   gain = calibpars -> pixel_gain();

Interface

...

pros

Simple format for calibration files - just a text file with pre-defined number of values for each type:

Code Block
973.941639 881.189675 1050.211 773.263749 899.241302 981.805836 1150.72615 993.084175 1121.15488 1029.76319 1220.14927 903.278339 1097.49944 1066.94949 1263.71044 1053.53872 1194.35915 935.320988 1317 ...

Interface drawback

Detector-dependent objects, parameters:

  • PSCalib::PnccdCalibPars which depends on PnccdPedestalsV1, PnccdCommonModeV1, ..., PnccdBaseV1
  • pdscalibdata::PnccdPedestalsV1::pars_t
    dscalibdata::PnccdCommonModeV1::pars_t
          = float
    pdscalibdata::PnccdCommonModeV1::pars_t     = uint16_t 
    pdscalibdata::PnccdPixelStatusV1::pars_t    = uint16_t
    pdscalibdata::PnccdPixelGainV1::pars_t      = float
  • const std::string groupName = "PNCCD::CalibV1";

Other words, we need to define calibration array shape, type of parameters, and where to find it under calib directory: groupName="PNCCD::CalibV1", source="Camp.0:pnCCD.1";

How to improve interface for "new-style" calibration

  • Use universal calibration object (for all detectors!):
    PSCalib::CalibPars *calibpars = new PSCalib::CalibPars(calibDir, source, runNumber, print_bits);
    where source defines the detector type,

  • Use universal (for all detectors!) modules for each calibration type:
    pdscalibdata/include/DetPedestalsV1.h          -  loads pedestals from file, returns ndarray of pedestals
    pdscalibdata/include/DetCommonModeV1.h  -  the same for common mode
    pdscalibdata/include/DetPixelGainV1.h            - the same for pixel gain
    pdscalibdata/include/DetPixelStatusV1.h         - the same for pixel status

  • Use universally (for all detectors!) pre-defined types of parameters :
    pdscalibdata::DetPedestalsV1::pars_t   = float
    pdscalibdata::DetCommonModeV1::pars_t  = uint16_t 
    pdscalibdata::DetPixelStatusV1::pars_t = uint16_t
    pdscalibdata::DetPixelGainV1::pars_t   = float
  • Define the groupName="PNCCD::CalibV1" from dictionary for source="Camp.0:pnCCD.1" - this means that we will never change the groupName !

     

  • Save/retrieve ndarray type/shape from file header, for example:

    Code Block
    # RULES:
# Lines starting with # in the beginning of the file are considered as comments or pseudo-comments for metadata
# Lines without # with space-separated values are used for input of parameters
# Empty lines are ignored

# Optional fields:
# TITLE:      This is a file with pedestals
# DATE_TIME:  2014-01-30 10:21:23
# AUTHOR:     someone
# EXPERIMENT: amotut13
# DETECTOR:   Camp.0:pnCCD.1
# CALIB_TYPE: pedestals

# Mandatory fields:
# DATA_TYPE:  float
# NDIMS:      3
# DIM1:       4
# DIM2:       255
# DIM3:       255

973.941639 881.189675 1050.211 773.263749 899.241302 981.805836 1150.72615 993.084175 1121.15488 1029.76319 1220.14927 903.278339 1097.49944 1066.94949 1263.71044 1053.53872 1194.35915 935.320988 1317 ...