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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 |
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Message ID: 250
Entry time: Tue May 5 13:58:45 2020
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| Author: |
Andrey Starodumov |
| Category: |
Full test |
| Subject: |
FT of M1582, M1649, M1667 |
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M1582: Grade C due to trimming failure in ROC1 for 189 pixels at +10C. This is third time module restesed:
1) February 26 (trimming for VCal 40 and old PH optimization): Grade B, max 29 failed pixels and in few ROCs mean noise
2) April 27: Grade C due to trimming failure in ROC1 for 167 pixels at +10C, at -20C still max 45 failed pixels and in few ROCs mean noise
3) March 5: Grade C due to trimming failure in ROC1 for 189 pixels at +10C, at -20C trimming failure in ROC1 for 157 pixels
The module quality getting worse.
M1649: Grade B due to mean noise >200e in ROC11
M1667: Grade B due to mean noise >200e in few ROCs
M1582 is in C* tray. To be investigated. |