Page History
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- Number of bad pixels depends on SNR parameter
- Stripe of bad pixels in the middle of the detector can be caught by Feature 3 and 6 at SNR=5.
- "Scratch" observed by Chuck is not seen detected ...
2023-04-07 mtg summary
- Chuck: try to search for scratch in ASIC ONLY!
- Chris: try to change gate limits in dark processing to reproduce bad pixel in the middle stripe.
2023-05-12 low gain pixels
det_calib_ave_and_max -d exp=xpplw3319:run=293 -s XppGon.0:Epix100a.3 -n 100000
generates max-peds for 35998 events of xpplw3319-r0293
img-XppGon-0-Epix100a-3-xpplw3319-r0293-e035998-mode-p-max.npy
use test algorithm test-2023-04-26-chuck.py
from img-XppGon-0-Epix100a-3-xpplw3319-r0293-e035998-mode-p-max.npy
find median and +/- 6 * (median of difference)
max-peds: shape:(704, 768) size:540672 dtype:float32 [135.05005 135.3999 177.94995 180.53003 176.6001 ...]
Summary of the bad pixel status evaluation
0o1: 10021 / 540672 ( 1.853%) pixels max-peds <= 127.788
0o2: 3689 / 540672 ( 0.682%) pixels max-peds >= 203.811
saved arr_status_med-peds.npy
arr_status_med-peds.txt
cp arr_status_med-peds.txt /cds/data/psdm/xpp/xpplw3319/calib/Epix100a::CalibV1/XppGon.0:Epix100a.3/status_extra/0-end.data
see Bad Pixel Status
REFERENCES
- Paper in JAC: Automatic bad-pixel mask maker for X-ray pixel detectors with application to serial crystallography,
- Journal of Applied Crystallography - 2022 - Sadri - Automatic bad‐pixel mask maker for X‐ray pixel detectors with.pdf
- Bad Pixel Status