CYGNUS-RD / reconstruction

Camera and scope analysis tools
0 stars 25 forks source link

Use the pure vignetting correction from white light pictures #135

Closed emanueledimarco closed 3 years ago

emanueledimarco commented 3 years ago

Pure vignetting by the average of three runs with different orientation of the camera. Pictures of white light illuminated noise of the wall in Frascati lab by @davidepinci . Average of 3 orientations are taken to move away the neon lines.

The measurement is done with ORCA flash (2048 x 2048). The vignetting map is the following:

image

1D profile is the following: image

Since the vignette is perfectly circular, the 1D profile is stretched to 2304 pixels and used to make a vignette map for LIME (2304 x 2304). This has a perfect circular symmetry by construction.

image

Everything is in the same input file (data/vignette_runs03930to03932.root) and it is automatically taken when giving the geometry (lime or lemon) in the configFile.txt

@gdimperi This is pure vignetting map (no field, gas effects, etc). Keeping the effective map in data/vignette_run03806.root, but this for sure is affected by the light in the top of the sensor.

@davidepinci @gianlucacavoto now reconstructing Fe55 runs with this correction.