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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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 Tue Apr 21 17:39:48 2020, Andrey Starodumov, Full test, FT of M1542, M1554, M1555, M1653
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 Wed Apr 22 17:41:11 2020, Andrey Starodumov, Full test, FT of M1542, M1554, M1555, M1653
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Thu Apr 23 13:34:52 2020, Andrey Starodumov, Full test, FT of M1542, M1554, M1555, M1653
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Message ID: 226
Entry time: Thu Apr 23 13:34:52 2020
In reply to: 225
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| Author: |
Andrey Starodumov |
| Category: |
Full test |
| Subject: |
FT of M1542, M1554, M1555, M1653 |
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| Andrey Starodumov wrote: |
| Andrey Starodumov wrote: |
M1542: Grade C due to massive (>1000pixels in total) trimming failures at -20C in ROC11,14,15. There was no such problem at previous test when CtrlReg=9 was used, while for the present test CtrlReg=17 was used
M1554: Grade C due to massive (>1000pixels in total) trimming failures at -20C in ROC9,13. There was no such problem at previous test when CtrlReg=9 was used module was graded B, while for the present test CtrlReg=17 was used
M1555: Grade B due to 75 pixels had trimming failures at -20C in ROC10. There was no such problem at previous test when CtrlReg=9 was used, while for the present test CtrlReg=17 was used
M1653: Grade B due to >1% (~50) pixels had trimming failures at -20C in ROC5,12. |
Repeat test with CtrlReg=9. ONLY 2 TESTs: -20C, IV@-20C (upto 205V), +10C,IV@+10C (up to 205V)
Warning: at +10C the total leakage current of all modules = 9.7umA!? From yesterday the IV curves: each single module had the current less 0.5-1umA
M1542: Grade B due failure of 41 pixels in trimming of ROC6 at -20C. Grading at+10C is A!
M1554: Grade B due to mean noise >200e in ROC14 at both temperatures
M1555: Grade B due to mean noise >200e in 2 ROC at both temperatures
M1653: Grade B due failure of 45 pixels in trimming of ROC12 and mean noise >200e in ROC0 at both temperatures |
According to IV curves currents at 150V are: 0.27umA, 0.44umA, 0.49umA, 0.16umA. |