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Weaver, Matt 2018-11-19, 7:37 PMO'Grady, Paul Christopher;Dubrovin, Mikhail Hi Mikhail, We took radioactive source test runs today to verify the geometry. We found that we were rotated by 90 degrees, which matches the labeling on the back of the detector as well as the metrology picture from Chris Kenney. The runs are /reg/d/psdm/det/detdaq17/e968-r0131 - source unmasked (up to ~ event 10000), then masked vertically after ~ event 15000 /reg/d/psdm/det/detdaq17/e968-r0132 - source masked horizontally at bottom after ~ event 15000. So, the picture is... // (Epix10ka2m) // | // Quad 0 | Quad 1 Quad 2 is rotated 90d clockwise // -------+-------- Quad 3 is rotated 180d clockwise // Quad 3 | Quad 2 Quad 0 is rotated 270d clockwise // | // // (Quad 1) // | // Elem 0 | Elem 1 // -------+-------- No rotations // Elem 2 | Elem 3 // | // // (Elem 0) // | // ASIC 0 | ASIC 3 // -------+-------- No rotations // ASIC 1 | ASIC 2 // | // // (Elem 0-3 pixel array) // row increasing // ^ // | // | // column increasing <-- (0,0) |
Preliminary geometry
in /reg/g/psdm/detector/data_test/calib/
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/reg/g/psdm/detector/alignment/epix10ka2m/calib/Epix10ka2M::CalibV1/NoDetector.0:Epix10ka2M.0/geometry/0-end.data /reg/g/psdm/detector/alignment/epix10kaquad/calib/Epix10kaQuad::CalibV1/NoDetector.0:Epix10kaQuad.0/geometry/0-end.data /reg/g/psdm/detector/alignment/epix10ka/calib/Epix10ka::CalibV1/MecTargetChamber.0:Epix10ka.1/geometry/0-end.data |
Gain
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Blaj, Gabriel
2018-12-04, 2:08 PMO'Grady, Paul Christopher;Nelson, Silke;Dubrovin, Mikhail;Hart, Philip Adam
Hi,
You could try to use the gain files obtained with the pulser. They are not great but might work.
For a better gain calibration, we should use single photon data.
There is sufficient 1 photon data taken during the first testing at XCS,
but it will take me a few days to calculate the gains.
I would actually advocate returning the number of photons (as we
discussed in a meeting a few months ago). Even without a calibration it
can be easily calculated from the (average) gains:
High (FH and AHL): 132 ADU/9.5 keV
Medium (FM and AML): 43 ADU/9.5 keV
Low (FL, AHL, AML): 1.32 ADU/9.5 keV
(Just a note, while the pulser is not great for calibrating gains, it works fine for offset calibration)
Thanks,
Gabriel |
Gain factors
- High (FH and AHL): 132 ADU/9.5 keV
- Medium (FM and AML): 43 ADU/9.5 keV
- Low (FL, AHL, AML): 1.32 ADU/9.5 keV
References
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