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: 132
Entry time: Tue Mar 24 18:11:52 2020
Reply to this: 139
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Author: |
Andrey Starodumov |
Category: |
Re-grading |
Subject: |
Reanalised test results |
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Test resulsts of several modules have been re-analised without grading on trimbit failure.
M1614: C->B
M1613: C->A
M1609: C->B
M1618: B->A
M1612: B->B
M1610: B->B
M1608: C->B
M1606: C->C (too many badly trimmed pixels)
M1605: C->B
Most of all B gradings and one C are due to badly trimmed pixels. The threshold after trimming usually has 3(!) separated peaks.
We should understand this feature. |