gary.traylor@LIGO.ORG - posted 16:59, Wednesday 30 July 2014 - last comment - 17:15, Wednesday 30 July 2014(13085)
BSC9 Closeout Status
Gary, Matt, Danny, Keita, Stuart, Norna -First contact was applied to an ALS view-port. -UL AOSEM was swapped as a noise check. -Noise spectra for the OSEM was ran in several scenarios. -TMSX was checked for rubbing. -TMS BOSEMS were centered without the offsets. -UL AOSEM was put back into the PUM and its flag was re-centered. (seems as though the noise is from an SRS cable at the feed through) -First contact was removed from the view-port. -View-port was inspected with green light. -Both suspensions were left unlocked for TFs. Things left to do: -Lock ETM for first contact removal. -Remove first contact. -Inspect the optic with the green light. -Swing the baffle back down. -Unlock suspension and set the EQ stops and lock the nuts. -Center OSEMs if needed. -Run quick TFs for rubbing check. -One last wipe down. -Replace door. CC wafers will be added to the chamber at the proper time. Note: The floor was wiped after every exit today totaling 3 times.
TMS doesn't look super, but OK, as far as the free swing spectra are concerned.
Blue: one of many TMSY in-air spectra plots from the last vent.
Green: TMSX this morning in air.
Red: TMSX after Gary centered TMSX BOSEMs.
There are some differences between blue and red but not much, and red/green don't look worse than green.
I haven't found any obvious rubbing, cables do look the same as before, cables don't touch the sus wires, the top cables are not touching the inside of the top mass, safety wire is not touching the TMS, safety bar is not touching the TMS.
[1, 2Hz] especially for T looks somewhat funny (split peaks), that's the thing that Stuart found funny in his TF. But that funny thing also appeared for TMSY in the past (see https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=11021, at that time I couldn't achieve reasonable Q and single peak at the same time, each incursion made some changes but not in a consistent, controled manner) and it was fine for HIFO.
I'd say we go ahead and close the chamber.