Following the PR3 issues over the weekend, Jeff and I noticed some minor issues with the SWWD MEDM screens.These were:

the three HAM suspension OSEM face/top channels labeled F instead of T

some ADC monitors on the 4-to-1 screen had copy-paste errors

Quad suspensions did not show the ADC reordering (left-right-side are actually side-left-right on these systems)

I corrected these errors, which required some ADL changes and some macro substitution TXT file changes.

Screenshot attached.

I measured the laser power at the base of the periscope this morning.  The power meter was located
in front of the mirror directing the beam upwards.

    With an Ophir PD300-3W-SH power meter (S/N 171141, P/N 1Z02411), the highest value measured
over a ~2 minute interval was 160.4 mW.

    With an Ophir 20C-SH power meter (S/N 1711175, P/N 7Z02602), the highest value measured over
a ~ 2 minute interval was 169 mW.

    Both readings were taken using a 10 second average, with the zero offset removed using the
Vega display unit.

J. Kissel, S. Pai

Siddhesh and I B&K Hammer'ed the new MC2 and PR2 Scrapper Baffles, SR2 Cage, and of Primary/Final/Large? in-vac TCS Steering Mirrors in BSC2. More details, pictures, and results to follow.

Notes for myself later: 
- SR2 cage accelerometer was oriented with X Y Z aligned with the IFO global coordinates. 
- All other measurements had acc Y aligned with IFO Y, and acc Z aligned with IFO X.

Today, Travis and I used the red visible AUX laser to final align the ITMY elliptical baffle and the BS AR and HR baffles.  (Note, we had already done the BS baffles and the ITMX but wanted to check and document.  Note, the front back, and center targets of the elliptical baffle boxes do not all exactly line up, but the tolerance is 7mm so we are center to better than that on all of them.

Also, note, the BS baffles do not look very centered on the mounting to the BS structure, but the beam is centered thru the baffle, so can't do much about that.

Pictures are attached.

This afternoon, while helping Jason install the new AWC optics, I worked on routing the AOSEM cables for the OFI.  Hugh had preassembled the D1000225 SRS cable to the D1000234 Quadrapus cable and mounted it in a cable table bracket.  So all I had to do was route it all on the table, plug it into the feedthru and start connecting AOSEMs.  I've plugged in 1 AOSEM and will start looking at medms next.

In LHO aLog 39484, it was reported that the WHAM6 Corner3 CPSs was sitting on a rail and it would intermittently come off the rail when the cables were messed with.  I managed to get the channels off the rail but V3 was clearly noisier than the others.

Yesterday, I worked the cables over to eliminate this and maybe succeeded.  The CPS cables are in the right turn port of the 5-way cross and one of the cables was looped back in the hidden turn and although it could not be seen, I suspect the copper shield was close to the BNC Bayonet and this was the source of the intermittence.  Pulling and twisting the cable un-kinked the loop and it looks like it should remain.  Difficulty here is that now that the feedthru is on the five way cross, there is no connection to break to aid in untwisting the run.  At least for the past 24 hours however it has remained stable.

The attached 10 day trend of the CPS locals shows the elevated noise of V3 and how all sensors have a similar noise level.  Also notice how the H3 signal has jumped onto the page during this work yesterday indicating that channel was also affected although it was not on the rail (32k cts.)  But, it was being influenced on the absolute level readout, that is, actual reported position.  When I trend this back to before the vent, the reading was never at this level and I think that the sensor must have been exposed to some erroneous signals which was giving a false position.  I will say that both channels are much better now!

Will update ticket 9477 to monitor these channels for a time before closing.

(Kyle R, Gerardo M)

Last night while doing some work around the HAM5 I noticed the door cover for HAM5 being "sucked in" (see photo), that occurred every time someone removed the door cover to any other HAM chamber (4,3 or 2), it turns out that the new cleanroom creates great positive pressure causing the door cover for HAM5 to appear as being "sucked in".  So I ran a little test, while one of the other door covers was off and HAM5/HAM6 door covers on, I pushed some of the cleanroom curtains open, and that relieved some of the positive pressure created by the cleanroom HEPA fans, that allowed the purge air to "balloon" the door covers on HAM5, and as soon as I closed the curtains the door covers went back to getting pushed in towards the chamber.

Today Kyle and I used a long ladder to get access to some of the HEPA fans, there are 20 of them on that cleanroom, we dialed down 7 of them and there is a noticeable difference already, we plan to dial down some more tomorrow as work on that chamber allows it.