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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 Sep 10 15:18:20 2019, Matej Roguljic, Other, Modules 1504, 1505, 1520 irradiation report
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 Fri Sep 13 15:06:51 2019, Andrey Starodumov, Other, Modules 1504, 1505, 1520 irradiation report
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Thu Sep 19 00:52:24 2019, Dinko Ferencek, Other, Modules 1504, 1505, 1520 irradiation report 
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Message ID: 10
Entry time: Fri Sep 13 15:06:51 2019
In reply to: 8
Reply to this: 12
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| Author: |
Andrey Starodumov |
| Category: |
Other |
| Subject: |
Modules 1504, 1505, 1520 irradiation report |
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It was discovered that these modules were stored in Zagreb in the climatic lab where T was about +22C. These modules have been transported from Co60 irradiation facility to the lab on open air with T>30C and RH>70%. Water in the air under the cap condensated on the surface of HDIs and diluted residuals (from soldering, passivation etc), that after remains liquid or crystallised.
The irradiation itself does not course any damage. This is also confirmed by the fact that after two previous irradiations in Jan and Jul 2019 of modules and HDIs, samples remained in a good shape without any residuals on HSI surfaces. These samples have been kept in an office where T and RH were similar to the outside and not in the climatic lab.
We consider the the case is understood and closed. |