LIGO Document E1400472-v3
- Although this document is written as a general in situ cleaning procedure for test mass optics, it is motivated by the need to clean residue from the perimeter of a central alignment window in a First Contact™ (FC) layer which has been observed in imaging of the H1 ETMy HR surface with Arm Length Stabilization (ALS) system green light (see LHO elog entry #15479):
- At GariLynn's request I switched the drag wipe procedure from T0900402 to E070304 (with acetone, not methanol). This procedure is now final for the H1 ETMy vent this week.
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