Reports until 11:51, Wednesday 17 December 2014
H1 SUS
betsy.weaver@LIGO.ORG - posted 11:51, Wednesday 17 December 2014 - last comment - 16:00, Wednesday 17 December 2014(15677)
ETMy Test Mass cleaning status

This morning, travis and I pulled the FC sheet that we applied to the ETMy yesterday.  The patchy smudge mark and the large gooeyish particle that we induced yesterday were apparently picked up by this FC sheet.  While there, we tested using the cotton tipped Q-tip on a portion of the ring around the edge of the optic (~1Inch in from bevel edge near the bottom).  We used both DI water and also acetone, both chased with ~5 spot drag wiped of acetone using the pressure technique.  Upon evaluating neither q-tip+ acetone drags seemed to improve the area since both swipes added to the streaking which the chasing acetone could not fully remove with 5 wipes.

Comments related to this report
richard.savage@LIGO.ORG - 16:00, Wednesday 17 December 2014 (15692)
Link 

Our cleaning efforts at EndY have focused on the three larger scattering objects on the surace (which were apparently removed) and the ~3" diameter "stain" associated with the thinner central window in a previous layer of First Contact (which we have not been very successful in removing.
)
The composite image below includes six images.  All were taken by illuminating the lower edge of the central "stain" feature with the green LED flashlight.
The two on the left were taken before applying First Contact (note the large scattering objects are still on the surface).
The middle two were taken after the first application and removal of First Contact.
The two on the right were taken today, after the second application and removal of First Contact.

It doesn't appear that we have significantly improved the "stain" feature.
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