This script lives in /reg/g/psdm/tutorials/examplePython/areaDetAccess.py and demonstrates how to access calibrated "unassembled data" (3D array, no geometry applied) and "assembled images" (2D array, geometry applied). Assembled/unassembled are only different for multi-panel detectors. For monolithic 2D area detectors they are the same.
from psana import *
ds = DataSource('exp=xpptut15:run=54:smd')
det = Detector('cspad',ds.env())
for nevent,evt in enumerate(ds.events()):
# includes pedestal subtraction, common-mode correction, bad-pixel
# suppresion, and returns an "unassembled" 3D array of cspad panels
calib_array = det.calib(evt)
# this is the same as the above, but also uses geometry to
# create an "assembled" 2D image (including "fake pixels" in gaps)
img = det.image(evt)
break
import matplotlib.pyplot as plt
plt.imshow(img,vmin=-2,vmax=2)
plt.show()
One can see all the methods of a class using ipython tab completion, or a full list of all methods of the "Detector" object can be found here:
/reg/g/psdm/sw/releases/ana-current/Detector/examples/ex_all_dets.py
You can find a version with more advanced graphics here.
The Detector interface can be used to access several types of detectors. More documentation on specific detector types can be found here:
- Area Detectors
- Waveform Detectors (e.g. Acqiris, IMP)
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