Difference between revisions of "Visual inspection and repairing of lead glass modules"

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(→‎Disassemble Lead Glass Module)
 
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== Disassemble Lead Glass Module ==
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<gallery>
 
<gallery>
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image:glass_mod.jpg | Fig. 1 Lead glass module
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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.  
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Image:hycal_patch_panels.jpg | Patch panels for HyCal dividers 
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Image:glass_screw.jpg | Fig. 2 Unscrew flange from the PMT side
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Image:hycal_dividers.jpg | HyCal dividers
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Image:glass_strap.jpg | Fig. 3 Remove steel strap assembly
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Image:hycal_pwo_glass.jpg | Lead glass and lead tungstate regions
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Image:glass_sc1.jpg | Fig. 4 Remove silicon cookie from the PMT side of the glass bar
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Image:hycal_inner_layers.jpg | PbWO inner layers
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Image:glass_unwrap.jpg | Fig. 5 Remove wrapping from the module
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Image:hycal_front_plate.jpg | HyCal front plate cover
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Image:hycal_lms.jpg | HyCal LMS distribution
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Image:hycal_insulations.jpg | HyCal insulation near front panel
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</gallery>
 
</gallery>
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Step 1: Inspect lead glass module (see corresponding section) to make sure the the module
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has to be disassembled.
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Step 2. Loose screws on the flange attached to the PMT housing
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Step 3. Remove steel strap assembly holding together the PMT housing and lead glass block
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Step 4. Remove silicon cookie (note the cookie may stick to the glass block; use a wood stick to scrub if needed)
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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)

Latest revision as of 22:54, 17 October 2022

Disassemble Lead Glass Module

  • 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)

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