Difference between revisions of "Visual inspection"
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| − | Image:glass_wrap_prob.jpg | Fig. 2 Wrapping issue: teared Aluminized mylar, | + | Image:glass_wrap_prob.jpg | Fig. 2 Wrapping issue: teared Aluminized mylar, can be fixed without disassembling module |
| − | Image:glass_wrap_prob1.jpg | Fig. 3 Wrapping issue: | + | Image:glass_wrap_prob1.jpg | Fig. 3 Wrapping issue: Al layer peeled off |
| − | Image:glass_wrap_prob2.jpg | Fig. 4 Wrapping issue: teared | + | Image:glass_wrap_prob2.jpg | Fig. 4 Wrapping issue: Al layer peeled off, teared wrapping foil |
</gallery> | </gallery> | ||
Revision as of 10:50, 18 October 2022
Fig. 1 Broken glass
Fig. 2 Wrapping issue: teared Aluminized mylar, can be fixed without disassembling module
Fig. 3 Wrapping issue: Al layer peeled off
Fig. 4 Wrapping issue: Al layer peeled off, teared wrapping foil
Fig. 5 Damaged PMT
Fig. 6 Colored lead glass module, possible radiation damage issue. Can be seen without removing steel flange.
Fig. 7 Colored lead glass module
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.
