LIGO Document D1500163-v4
- Redesigned End Reaction Mass (ERM) with Dia. 200 mm hole in center
- Revised as follows:
Note no. 3 was:
...ALL SURFACES (INCLUDING INSIDE BARREL), EDGES AND CHAMFER....
Note no. 5 was:
APPLY ESD GOLD COATING PER E0900138.
Note no. 7 was:
MAT'L: 648339.386 (SF2) GLASS.
Zone E/3: Identified Inner barrel surface with 'S4'
Zone B/7: Thickness tolerance was +/-.25
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