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epix_alc2

epix_alc3

epix_alc4

Interim Summary

  • In alc1 two data banks look different from other banks, but they are not so bad to discard them by changing thresholds.
  • The "scratch" in alc3 is not seen in dark.
  • The number of bad/discarded pixels can be changed by variation of thresholds.

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Chuck wants to find "scratch" automatically

2023-04-06 Feature 2 and 3 for dark data vs our standard dark processing

exp=xpplw3319:run=287 -s XppGon.0:Epix100a.3

By default features 1,2,3 are used. Feature 4 and 5 for gain factors are not implemented and are irrelevant to epix100a.

Feature 1 - good frame selection discards 1/0/0 frames for SNR=3/5/8, respectively

Code Block
titleResults for SNR max = 3,5,8
collapsetrue
det_raw_pixel_status -d exp=xpplw3319:run=287 -s XppGon.0:Epix100a.3 -n 1000 -R3 --gmode SNR3

Summary of the bad pixel status evaluation for SNR = 3.00, status_data array
                   0o1:     6445 / 540672 ( 1.192%) pixels Feat.2 mean <= 3588.608
                   0o2:    13484 / 540672 ( 2.494%) pixels Feat.2 mean >= 4374.797
                   0o4:     5600 / 540672 ( 1.036%) pixels Feat.3 std <= 2.314
                  0o10:    34098 / 540672 ( 6.307%) pixels Feat.3 std >= 3.263
    Any bad status bit:    57409 / 540672 (10.618%) pixels


det_raw_pixel_status -d exp=xpplw3319:run=287 -s XppGon.0:Epix100a.3 -n 1000 -R5 --gmode SNR5

Summary of the bad pixel status evaluation for SNR=5.00, status_data array
                   0o1:        5 / 540672 ( 0.001%) pixels Feat.2 mean <= 3326.536
                   0o2:       87 / 540672 ( 0.016%) pixels Feat.2 mean >= 4636.866
                   0o4:      878 / 540672 ( 0.162%) pixels Feat.3 std <= 1.999
                  0o10:    12739 / 540672 ( 2.356%) pixels Feat.3 std >= 3.579
    Any bad status bit:    13675 / 540672 ( 2.529%) pixels


det_raw_pixel_status -d exp=xpplw3319:run=287 -s XppGon.0:Epix100a.3 -n 1000 -R8 --gmode SNR8

Summary of the bad pixel status evaluation for SNR=8.00, status_data array
                   0o1:        0 / 540672 ( 0.000%) pixels Feat.2 mean <= 2933.437
                   0o2:       33 / 540672 ( 0.006%) pixels Feat.2 mean >= 5029.965
                   0o4:        0 / 540672 ( 0.000%) pixels Feat.3 std <= 1.525
                  0o10:     5314 / 540672 ( 0.983%) pixels Feat.3 std >= 4.053
    Any bad status bit:     5319 / 540672 ( 0.984%) pixels

Image AddedImage AddedImage Added

Code Block
titlepixel_status from regular dark processing
collapsetrue
det_ndarr_raw_proc -d exp=xpplw3319:run=287 -s XppGon.0:Epix100a.3 -n 1000 -o work

raw data found/selected in 1000 events
[I] UtilsCalib.py L0683 begin data summary stage
[I] UtilsCalib.py L0112 evaluate_limits RMS: ave=2.317 std=0.370  limits low=0.097 high=4.536
[I] UtilsCalib.py L0112 evaluate_limits AVE: ave=3983.565 std=188.830  limits low=2850.584 high=5116.546
[I] UtilsCalib.py L0721 bad pixel status:
  status  1:      643 pixel rms       > 4.536
  status  2:        0 pixel rms       < 0.097
  status  4:        0 pixel intensity > 16000 in more than 0.1 fraction (99/999) of non-empty events
  status  8:        0 pixel intensity < 1 in more than 0.1 fraction (99/999) of non-empty events
  status 16:       31 pixel average   > 5116.55
  status 32:        0 pixel average   < 2850.58

Image Added


REFERENCES

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