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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: 121
Entry time: Fri Mar 20 18:09:47 2020
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| Author: |
Andrey Starodumov |
| Category: |
HDI test |
| Subject: |
3 HDIs tested |
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5008 failed, but most likely die to the pin head mis-alignment. Test to be repeated.
5007 and 5008: passed tests but during HV measurements (-800V) with a multymeter I heard high frequency noise and instead of -800V measure either -100V or -500V but the voltage jumped significantly. This effect is to be understood.
For the moment these HDIs will not be used in production. |