TITLE: 11/13 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
INCOMING OPERATOR: None
SHIFT SUMMARY: Purge air work took up the morning, and then a few crews went in. MC2 and PR2 WD have tripped, but I will wait for the SEI crew to finish the balancing before someone (not me) untrips it. Film crew is out in the LVEA with Keita.
LOG:

• 16:18 Amber and crew out from LVEA
• 17:40 Patrick, Fil to EX to replace card
• 17:48 Jeff, Kentaro to Y beam manifold for camera work
• 17:52 Cheryl to LVEA to change PSL environment temp
• 18:16 Richard, Fil to LVEA to take pictures and measure
• 19:06 Koji to Optics Lab, OFI work
• 19:14 Bubba taking the film crew in the snorkel lift in the LVEA
• 20:50 Jeff B to EX,EY to check on dust monitor vacuum system
• 21:24 Terry to LVEA Squeezer Bay
• 21:25 Travis to LVEA to grab and pic equipment
• 21:30 Jeff B back
• 21:39 Patrick to EX
• 21:56 Purge air work complete, Hugh to HAM3 to balance
• 22:08 Patrick back, Jim to HAM3
• 22:43 Bubba and Mark to EY
• 22:44 Fil, Marc to LVEA to move some cables, they will need to use the roll up door for a few min.
• 22:50 Betsy to LVEA to clean up and prep parts
• 22:56 Keita and film crew to LVEA
• 23:58 Travis, Betsy out
• 23:59 Cheryl to PSL

Laser Status:
SysStat is good
Front End Power is 35.82W (should be around 30 W)
HPO Output Power is 153.0W
Front End Watch is GREEN
HPO Watch is GREEN

PMC:
It has been locked 0 days, 0 hr 2 minutes (should be days/weeks)
Reflected power = 22.43Watts
Transmitted power = 45.97Watts
PowerSum = 68.4Watts.

FSS:
It has been locked for 0 days 0 hr and 2 min (should be days/weeks)
TPD[V] = 1.931V (min 0.9V)

ISS:
The diffracted power is around 4.2% (should be 3-5%)
Last saturation event was 0 days 0 hours and 1 minutes ago (should be days/weeks)

Possible Issues:
PMC reflected power is high

Notice: Purge air work this morning, no in chamber work till this has completed. Should be complete this afternoon.

BSC arm removal to happen this morning during the purge air work, cover will stay on.

Squeezer Bay will still be intermittent laser hazard.

IO - IMC bypass planned to go in this afternoon/tomorrow morning. MC2 & PR3 are rubbing and they will revisit, alignment looks good.

OFI still a wip in lab.

ITMX --> PR3 Aux beam still set up.

Hugh ready to balance HAM3 when time permits. Half a day, few hours is lucky.

TCS tables are still being worked on by Greg.

GV6 is still closed, leak checking has finished.

Tues. Maintenance:

• CDS- Some DAQ reboots.
  • OPS please check the alignments after the reboots.
• HVAC work in OSB, but not in LVEA. Labs and Control Rooms. Work may continue throughout the week, they will try to keep stable temperatures.

Make sure to continue to do FAMIS tasks, and remember to close the task from the dropdown menu.

Trends all look normal for the most part. Temperature trends show an ongoing effort to stabilize for alignment work.

TITLE: 11/13 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Planned Engineering
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    Wind: 10mph Gusts, 8mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.55 μm/s
QUICK SUMMARY: Vent work continues

Looking into PSL temperatures, I started looking at the AC temperatures, and what I see is that the signals for TBLS and ACS appear to be switched.  Attachment shows from left to right:

• left: TBLN (blue) and TBLS(red)
• middle: TBLN (blue) and TBLS(red) and ACS(black)
• right:  TBLN (blue) and TBLS?(black) and ACS?(red)

Late alog for last Fri:

After moving the AUX IFO simulator beam to the ITMx-PR3 targets installed late Thur, we connected the ITMX Elliptical baffle box to it's down tube suspension structure.  Immediately we discovered that the box looked visibly crooked and out of alignment.  Recall that Robert has data supporting that this (and maybe the ITMY baffle) are misaligned and causing coupling into DARM, see his alog 39290.

We spent a few hours looking into the surveying history of this baffle and came up with somewhat unfinished IAS and alog records of final alignment of this baffle back in 2013.  As well, these records indicate that alignment of the baffles was only performed using the center target, which seems insufficient to align the baffle.  SO, maybe it's no wonder there has been coupling here.

Monday, we'll continue work to align baffles and more, likely with some consult with SYS...

(Betsy, Gerardo)

This morning Betsy and I removed the OFI Table from HAM5, cage, suspension assembly and damping assembly remain inside HAM5.

The table was transported to the optics lab for testing.

In order to keep the suspensions damped as much as possible, I've loaded a changed suspension guardian similar to what is described in 39327 

This will not impact the way users interact with the suspension guardians.  Previously, the suspensions guardians would turn off all damping whenever any stage tripped, the new code does not do this and relies on the watchdogs to turn off any stages which have unreasonable drives.  When the user untrips the watchdog everything will be turned off so that it can be turned back on using the usual guardian procedure. 

The code that we are running here at LHO is actually userapps/sus/h1/guardian/SUS2.py  It is in the svn as revision 16426.  Tripped is still a protected state, which was necessary to keep the suspension from going to the RESET goto state. Attached is a diff between what I've just loaded and the previous version. 

[Arnab, Chandra, Kyle, Rakesh]

We spent a good part of today setting up for and diagnosing an unidentified known leak (e-7 Torr-L/s range) between GV 5 & 6, where cryopump #1 (CP1) and spool are (corner station, y-arm side). First we checked for inner o-ring leaks by connecting aux turbo cart to GV annuli and pumping and pressurizing (to about 1 Torr) with bottled dry N2 using a control needle valve. Then we soft closed GV6 (with GV5 hard closed) and shortly after valved in the newly installed 55 l/s ion pump (IP) connected to bottom of CP1. Then we walked over to the 10" CETEC GV on CP1 spool to start removing the ISO flange to connect 500 l/s turbo for He leak checking. Kyle checked the CETEC valve to verify it was closed and was able to tighten by a good half turn. We see two pressure bumps that correlate with these activities. We think we fixed the leak by tightening that CETEC valve (and suspect the ISO side is up to air), but won't know for sure until we open GV6 and trend the adjacent gauge (PT-124b), which rises when exposed to CP1 volume (because of leak) and falls when GV6 is closed.

After the pressure at CP1 (PT-114b) started to plateau just above 1e-8 Torr, we valved out the 55 l/s IP for about 10 minutes (without compressing Cu gasket on right angle valve) and valved back in to check response. We are leaving it in this configuration over the weekend - with GV6 soft closed and 55 l/s IP valved in. Dave Barker set a text alert for PT-114b to alarm for pressures above 2e-7 Torr in case the IP turns off.

Note that this volume has been He leak checked in the past by John & Kyle and remained inconclusive after spraying He and seeing no signal on leak checker.

The TCS CO₂ Y table is approximately in its new location. Unfortunately, this new location is partially off the technical slab, one leg is mostly off as seen in the first photo. While lowering the table off of the wheels one bolt sheared off, so I removed the wheel for now and moving will have to be done with a pallet jack. The new baffle hardware has also been installed with a temporary plate. The panel has a hole too large for the new hardware and this plate will be used until a new panel comes in. The next step is to install the new BSC viewport pieces and lightpipe. 

I extracted the failed fiber-channel fiber FMM-10M-0018 and routed the replacement FMM-10M-0014 through the fiber tubes and cable trays. While the fiber was being replaced, the redundant routing of E18-1 to LDAS via the two Q-Logic switches resulted in no loss of connection. I also rerouted two management ethernet cables from the surplussed SATABOY to the primary controller card on both E18 RAIDS, we will activate these next week.

WP7215 Chandra, Kyle, Dave:

As per request from the vacuum group, I have added the PT114B Cold Cathode vacuum gauge (and its associated ERROR channel) to the alarm system. It is configured to alarm if its value goes above 2.0e-07 Torr (it is currently at 1.3e-08 Torr and trending downwards). Alarms will be sent to the vacuum group and myself.

Issues with Commissioning mode and issues with Science mode led me to try a new mode, which is Commissioning mode with Makup Air turned down from 100%.

• 13:52 - turned makeup air to 50%
• ~14:10 - turned makeup air to 30%
• 15:54 - North went above 23C, the setpoint for the AC that's set inside the PSL - picture attached
• 15:52 - turned makeup air to 40%

Leaving it set at 40% - JeffK is watching.

Gerardo stated that the Optical Table was not very level using a small T-Level and that the OFI needed adjustment to hang properly after doing all the adjustments on an optical table bench.

So I used the Optical Auto Level to look at the table.  With seven shots, above the walls at every corner and in the center of the table, the range of level was +-0.1mm--very level in our books.  I did manage to tie it into our LVEA monuments to put an actual elevation on the table: -325.8mm Lz.  Adding the -0.3mm conversion from local the global gives -325.8mm Gz (See T1100187.)  Looking at D0901129, it shows the Optical table to be 325mm below the BEAM TUBE CL.  I can't tell or remember if this is below the HAM5 BT CL or below the BSC2 BT CL where global 0 0 0 is positioned.  Either way, we are within 0.5 to 0.8mm of ideal elevation for this Optical Table and again very level.  Frankly, I'm relieved!  Attached are my field notes.

J. Kissel

Since HAM4's construction / installation stuff for this vent is complete as of yesterday's HWS Scraper Baffle install (LHO aLOG 39266), and the debugging of SR2's M2 OSEM today (LHO aLOG 39277), I took the afternoon to start B&K hammering all of the new / old baffle equipment and HWS mirror / lens mounts. Note, I deliberately skipped the SR2 cage, since nothing has changed on it since it was originally measured in LHO aLOG 12089, and I trust that Betsy and Travis successfully re-dogged and torqued bolts when they finished the relocation a few days ago LHO aLOG 39240.

Will post pictures and results next week.