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By default psana assumes that all calibration files are located in the pre-defined directory
/reg/d/psdm/<INSTRUMENT>/<experiment>/calib/ as explained in Locating calibration files. However, for analysis it may be convenient to re-define the calibration directory through the psana parameters. In order to fulfill the naming conventions we have to create a tree of the calibration sub-directories somewhere in local user's space, for example:

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  • runs through 400 events of the xtc file exp=meca1113:run=45,

  • uses CSPadNDArrProducer and CSPad2x2NDArrProducer modules to get cspad and four cspad2x2 data  and put them as universal ndarray<T,3> objects in psana event store,

  • uses NDArrAverage module to evaluate and save in file average, rms, mask, and hot pixel map for all array elements:

     

    No Format
    cspad.0-ave-meca1113-r0045.dat
cspad.0-hot-meca1113-r0045.dat
cspad.0-msk-meca1113-r0045.dat
cspad.0-rms-meca1113-r0045.dat
cspad2x2.1-ave-meca1113-r0045.dat
cspad2x2.1-hot-meca1113-r0045.dat
cspad2x2.1-msk-meca1113-r0045.dat
cspad2x2.1-rms-meca1113-r0045.dat
cspad2x2.2-ave-meca1113-r0045.dat
cspad2x2.2-hot-meca1113-r0045.dat
cspad2x2.2-msk-meca1113-r0045.dat
cspad2x2.2-rms-meca1113-r0045.dat
cspad2x2.3-ave-meca1113-r0045.dat
cspad2x2.3-hot-meca1113-r0045.dat
cspad2x2.3-msk-meca1113-r0045.dat
cspad2x2.3-rms-meca1113-r0045.dat
cspad2x2.4-ave-meca1113-r0045.dat
cspad2x2.4-hot-meca1113-r0045.dat
cspad2x2.4-msk-meca1113-r0045.dat
cspad2x2.4-rms-meca1113-r0045.dat

NDArrAverage module has a bunch of parameters which depend on particular detector/experiments and need to be adjusted looking at spectra of average and rms values from these files. For example averaged image and spectrum and rms spectrum of pixel intensities for

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Code Block
ssh -Y psana
cd <your-favorite-directory>
kinit

<next 6 lines can be copied and pasted>
newrel ana-0.10.14 my-release-dir;
cd my-release-dir;
sit_setup;
addpkg ImgAlgos HEAD;
addpkg CSPadPixCoords HEAD;
scons -j 8;

<wait a few minutes until it is compiled>


<pick-up *.cfg files> files and run them> 

psana -c psana-meci0114-r0050-exampleimgdump-cspadcalib.cfg
psana -c  psanapsana-meci0114-r0050-exampleimgdump-ndarrcalib.cfg

These example print too much, but this is an intentional example. Level of verbosity can be controlled by the print_bits parameter for each module.

Configuration files

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Psana can use python modules. A few modules in package pyimgalgos were recently developed to process CSPAD data.

Psana Module Catalog - Package pyimgalgos

Psana Module Examples - Examples for Package pyimgalgos

In particular, module  pyimgalgos.image_save_in_file may save image in 16-bit tiff files.

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Other option for floating point conversion: -define quantum:format=floating-point

 

 

References

NDArrAverage module