CMS Pixel Detector Miscellaneous
Phase 1 Phase 2
Layer 1 Replacement Layers 2-4
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Message ID: 221     Entry time: Mon Apr 20 17:09:12 2020
Author: Andrey Starodumov 
Category: HDI test 
Subject: 4 HDIs tested 
After staying in 90%+ RH 2 HDIs became flat. The first one was easy to mount on an HDI holder.
But after 1-2hrs the second HDI became bent again, but still remained flexible, so was also easy to mount.
I put 2 more HDIs in the same conditions and after 2 hrs was able to mount and test them.
4041, 4043, 3033, 3041 tested. All OK.
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