Reports until 16:47, Tuesday 31 January 2012
H2 SUS
betsy.weaver@LIGO.ORG - posted 16:47, Tuesday 31 January 2012 - last comment - 08:31, Wednesday 01 February 2012(2120)
ITMy BSC8 SUS work
We have re-applied FirstContact to the ITMy HR and the TCP AR.  When we peeled the "old" sheet from the ITMy HR we observed ~10-20 particles per square inch.  (We did have continuous N2 filter flow over the surface during th epeel and during the inspection.)  I used the alpha swabs in an attempt to free some of the larger particles from the surface - I was successful on most of the larger which were more like ~1 per few square inches.  We also observed alot of the streaking observed and recorded before.  We hope the new sheet which we plan to peel tomorrow will remove the streaks and most of the particulate.
The TCP AR surface appeared much cleaner, likely because we never pull this sheet for IAS purposes.

After re-suspending the masses, we adjusted one of the PUM OSEMs and one of the UIM magnet flags as Garcia needed another round of tweeking on those.   

The ITMy has been left suspended.
The FMy is also suspended.

As of this writing the ISI is still locked.
Comments related to this report
betsy.weaver@LIGO.ORG - 08:31, Wednesday 01 February 2012 (2125)
Also, we removed the UIM tray that had been on the QUAD since early January (to facilitate ACB work).  The tray does not bolt to the structure but sits loosely on the lower stucture - likely this was causing some ~50 Hz peaking Kissel observed in the January spectra.