Difference between revisions of "Repairing of lead glass modules"
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== Disassemble Lead Glass Module == | == Disassemble Lead Glass Module == | ||
| − | + | Lead glass module: | |
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| − | + | Lead glass length: 45 cm | |
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| − | Lead glass length: | + | |
Silicon cookie width: 2 mm | Silicon cookie width: 2 mm | ||
| − | Light guide: | + | Light guide: length 2 inches (5.08 cm), diameter D = 1.25 inches |
| − | PMT length: | + | PMT length: 10 cm ( + 9 mm including pins) |
Base length: 17 cm | Base length: 17 cm | ||
| − | Total length: | + | Total length: 45 + 5 + 10 + 17 = 77 cm |
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| + | <gallery> | ||
| + | image:glass_mod.jpg | Fig. 1 Lead glass module: Lead glass block wrapped with Al mylar. PMT housing is attached to the block using steel strap assembly. | ||
| + | Image:glass_screw.jpg | Fig. 2 Unscrew flange from the PMT side | ||
| + | Image:glass_strap.jpg | Fig. 3 Remove steel strap assembly | ||
| + | Image:glass_sc1.jpg | Fig. 4 Remove silicon cookie from the PMT side of the glass bar | ||
| + | Image:glass_unwrap.jpg | Fig. 5 Remove wrapping from the module | ||
| + | </gallery> | ||
Revision as of 13:33, 17 November 2022
Disassemble Lead Glass Module
Lead glass module:
Lead glass length: 45 cm
Silicon cookie width: 2 mm
Light guide: length 2 inches (5.08 cm), diameter D = 1.25 inches
PMT length: 10 cm ( + 9 mm including pins)
Base length: 17 cm
Total length: 45 + 5 + 10 + 17 = 77 cm
Fig. 1 Lead glass module: Lead glass block wrapped with Al mylar. PMT housing is attached to the block using steel strap assembly.
Fig. 2 Unscrew flange from the PMT side
Fig. 3 Remove steel strap assembly
Fig. 4 Remove silicon cookie from the PMT side of the glass bar
Fig. 5 Remove wrapping from the module
Step 1: Inspect lead glass module (see corresponding section) to make sure the the module
has to be disassembled.
Step 2. Loose screws on the flange attached to the PMT housing
Step 3. Remove steel strap assembly holding together the PMT housing and lead glass block
Step 4. Remove silicon cookie (note the cookie may stick to the glass block; use a wood stick to scrub if needed)
Step 5. Remove aluminized mylar wrapped around the glass block. Note, the Al Mylar thickness is about 13 um; the Mylar joint is positioned under the strap (no sticky tape is used on the joint)
