Difference between revisions of "Visual inspection"
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(→Possible issued with lead glass module) |
(→Possible issued with lead glass module) |
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#* lead glass module has to be disassembled | #* lead glass module has to be disassembled | ||
# Issues with wrapping | # Issues with wrapping | ||
| − | #* small damages (holes) of the Aluminized mylar, See Fig. 2 | + | #* small damages (holes) of the Aluminized mylar, See Fig. 2. Can be fixed using Al sticky tape, thickness < 20 um |
| + | #* Problems with the Al layer in the wrapping foil: | ||
| + | #** Al layer peeled off resulting in some transparent holes in the wrapping. | ||
Revision as of 09:42, 18 October 2022
Fig. 4 Broken glass
Fig. 1 Colored lead glass module, possible radiation damage issue. Can be seen without removing steel flange.
Fig. 2 Colored lead glass module
Fig. 3 Wrapping issue: teared Aluminized mylar, fix without disassembling module
Fig. 5 Damaged PMT
Possible issued with lead glass module
- Broken lead glass, see Fig. 1 (module taken from the FCAL prototype)
- some problems can be seen when looked on the lead glass block from the side opposite to the PMT
- lead glass module has to be disassembled
- Issues with wrapping
- small damages (holes) of the Aluminized mylar, See Fig. 2. Can be fixed using Al sticky tape, thickness < 20 um
- Problems with the Al layer in the wrapping foil:
- Al layer peeled off resulting in some transparent holes in the wrapping.
