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CMS Pixel Detector
Miscellaneous
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Phase 1
Phase 2
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Layer 1 Replacement
Layers 2-4
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| Layer 1 Replacement Elog |
Not logged in |
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Message ID: 280
Entry time: Fri May 29 15:41:40 2020
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| Author: |
Andrey Starodumov |
| Category: |
General |
| Subject: |
M1546 |
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ROC10 of M1546 has 107 pixels with trimming problems:
in a VCal threshold scan after trimming 81 has a threshold underflow, means <0, and 26 pixels are outside 40-60VCal window (around Vcal 50) at +10C only.
Trimbit distribution looks reasonable.
It has been checked that using trimming parameters VCal threshold distribution is fine (checked at +20C). See plots attached:
VCal threshold distribution in p10_1 test:
Trim bits distribution in p10_1 test:
VCal threshold distribution taken with trim parameters at +20C:
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