Light Guide Rework Plan

DRAFT

1. Second generation (new modules)
   • implement new gluing procedure on all new modules
   • monitor glue joints for 3 days before packing up
2. First generation modules (old procedures used)
   • Fix the black spot problem before rework
   • Confirm list of detached light guides to be reworked
   • Reglue all light guides with detached light guides
   • illuminate guides showing no detachment with 50 s of UV light through the front
3. Light guides
   • Lightly sand base with 600 grit paper.
   • If required to take off additional material, use 400 grit paper, then 600 grit.
   • Note: This process will be checked by Keith so ensure that 280 grit is not needed.
4. Lifting
   • Setup/process for lifting tops off boxes
   • Tom has suggested and approved a process for lifting the tops
5. Major rework
   • Treat in a similar way to new modules
   • Modules with major rework should be worked under the tent
   • These modules have been moved to the ESB for repair
   • Full testing after repairs are complete.
   • Monitor glue joints for 3 days before packing up. Note: continue monitoring 10 & 33 for a longer period
6. Minor rework
   • Likely rework down in the hall
   • Move the tent down to the hall?
   • Illuminate guides with no rework with 50 s of UV light through the front
   • Visual check of LEDs when work is complete.
7. Determination of detached status
   • "Detached" is to mean that an area corresponding to more than 8 fibers is separated.
   • On Monday, Bobby, Tina and Keith will independently make a visual evaluation of the detached status of light guides of modules on the floor of the ESB.
   • They will compare notes and, with Elton, come to a consensus of which light guides are to be classified as "detached"
   • Following this exercise, any of the three persons above, will make the determination of the light guide detached status
8. Documentation
   • Feedback to Jim on his new procedures document
   • Finalize version 1 and place under document control
   • I have submitted the Pansophy Rework sheet to be added to the system
9. Changes to the procedures
   • Any changes of procedures will have to be approved by Elton, or by Tim if Elton is not available.
   • Modifications will be made in consultation with all personnel working on the project.