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CsI Water Damage Repair:

1. Remove CsI crystals (56 out of 56) (11/15)
   • Dismantle telescopes
   • Store E, dE detectors
   • Unwrap CsI bundles
2. Remove as much filter paper as possible from CsI (using ethanol and plastic scraper) (56 out of 56) (11/20)
3. Document damage (depth on front surface) (56 out of 56)
4. Detach photodiodes from each crystal (leave light guides on for now) (56 out of 56) (12/19)
5. Remove remaining filter paper and light guide paint (56 out of 56) (12/19)
6. MAchine crystals at WashU (56 out of 56) (1/18)
   • Driven down/back
7. Sand sides of each crystal (56 out of 56) (3/14)
8. Design and assemble lapping setup (2/14)
   • Motion control + support
   • Coarse vertical motion
   • CsI holder that attaches to motion control
   • Sandpaper (delivered) (11/18)
9. Clean photodiodes, reattach to light guides
10. Reglue uncoupled light guides
11. Practice lapping with worst crystals (4/21)
12. Lap crystals until surface clean (4/28)
13. Polish, rewrap, assemble bundles (5/14)
14. Test individual crystals in dark box (check leakage current)
15. Reassemble telescopes (??)