Stefan, Dave:

we temporarily hooked up two timing signals in EY this morning and early afternoon. After acquiring data we have reverted the system back to its original configuration.

IRIG-B signal in frame.

To acquire the IRIG-B signal into the DAQ frame, we used the PEM channel H1:PEM-EY_MIC_VEA_MINUSY_DQ for this measurement. This channel was recording the IRIG-B signal between the times:

19:45 - 21:53 UTC.

To route the IRIG-B from the computer rack we borrowed the BNC coax cable which normally routes the 1PPS from the TCT to the first channel of the timing comparator. Therefore this comparator channel did not have any useful signal between the times 19:45 to 22:45 UTC. It is now restored to its running condition.

Local GPS receiver into Comparator.

To check what would happen if a local GPS receiver's 1PPS were to be connected to the timing comparator, we hooked the Symmetricom GPS receiver (which is in the VEA CDS rack and connected to an iLIGO GPS antenna on the roof) to the second comparator port. To acheive the connection, we found a long BNC coax cable which runs under the roll-up door between the CER/EBAY and the VEA. It was disconnected both ends. The GPS receiver was already powered on and had green LED indicators, so we assumed it has good satellite coverage. The comparator recorded a time difference of about 100nS. After the conclusion of the test, the long BNC coax cable was disconnected both ends and re-coiled.

Ops Day Summary:

• 10:00AM Tour
• 11:15Am Tour
• 9:32AM Jordan, PEM, EX
• 9:50AM Jason/Ed, ITMX/Y Oplev
• 10:20AM Christine/Karen, EX and MX and MY cleaning
• 10:30AM Jeff, tools to HAM6 crew
• 10:43AM Paradise Water delivered
• 10:54AM Keita to HAM6
• 11:36AM Dave, EY timing cables, temporary setup
• 11: 40AM Sudarchan/Jordan, EY, WP5301
• 11:45AM Patrick, added a temperature channel to Beckoff
• 12:02PM Christina & Karen done at Mid-X, going to Mid-Y

As of 2:00PM

• Filiberto and crew taking a break for lunch, mostly done
• HAM6 crew breaking for lunch, no official update, but helicoil tools were required earlier today
• CP2 was filled today and the tank is currently at 65.6%

as of 2:06PM

• 2:06PM HAM6 crew back in the LVEA
• 2:41PM RO Water alarmed - emailed Bubba and John
• 3:15PM Sudarchan/Jordan, EY, WP5301
• 3:30PM Dave - restoring nominal config. at EY

as of 4:00OM

• work continues at HAM6
• work continues at EY

I updated the fmcs alarm config file to put the RO Water system in it's own catagory, so it's easier to see, and easier to differentiate RO Water from alarms that are truely CRITICAL the moment they trigger.

New RO_WATER Guidance:

            $GUIDANCE

             Reverse Osmosis Water System is in alarm.

             The site may have potable water for 

             a while, but eventually will run out.

             Call John or Bubba

             $END

Channels removed per John's OK:

CHANNEL  CRITICAL H0:FMC-MY_CY_H2O_SUP_DEGF

              $ALARMCOUNTFILTER 300 300

CHANNEL  CRITICAL H0:FMC-MY_CY_H2O_RET_DEGF

              $ALARMCOUNTFILTER 300 300

CHANNEL  CRITICAL H0:FMC-MX_CY_H2O_SUP_DEGF

              $ALARMCOUNTFILTER 300 300

CHANNEL  CRITICAL H0:FMC-MX_CY_H2O_RET_DEGF

              $ALARMCOUNTFILTER 300 300

No longer CRITCAL alarms, and do not need to be in the fmcs alarm handler.

The high-voltage power supplies for the PSL servos ( in rack PSL-R2 ) were relocated to the CER mezzanine. Effected boards are:

PSL Injection Lock Servo - T0900577
PMC Locking Servo - T0900577
TTFSS Fieldbox - D1100367

Peter King was able to lock PMC after our work was complete. 

In an email conversation Norna had asked what we could do to reduce motion on the HAM's in the RX/RY dofs at 25-35 hz. This morning I took a few measurements to design a FF filter. I've taken a first pass at it and I think I have something that works. Attached spectra are of the ground STS X and GS13s in RY the first png, then both sensors in X on the second plot. The live measurements are with FF on, references are from a quiet time last night, FF off.

The third attachment is a plot from the script I used to do the filter fit. Blue is the filter, green is the ideal fit from the St0 L4C's to the ISI GS13's, red is the fit from the HEPI L4C's to the ISI. The design approach is exactly the same as I talked about in my alog 18045.

Committed the change to svn and restarted all of the code. Burtrestored to 6:10 this morning.

J. Oberling, E. Merilh

We swapped the oplev laser for ETMx; power cycling the laser did not improve its behavior.  Old laser SN 197, new laser SN 106-1.  The old laser will be bench tested to see if we can find out what's wrong and if there's anything we can do about it here (possible return to MicroLaser)

We installed the 50lb lead vibration absorbers on the ITMx and ITMy oplev receiver piers.  The ITMx oplev did not need to be realigned after the installation; we did however realign the ITMy oplev after installation.  All lead vibration absorbers are now installed at LHO (ETMx, ETMy, ITMx, ITMy).

Added 262 channels. Still 707 channels unmonitored since restart of end X TwinCAT code.

Updated C:SlowControls on h1ecatc1, h1ecatx1 and h1ecaty1 to latest revision in svn. Restarted all TwinCAT code. Required multiple restarts.

Burtrestored all to 6:10 this morning.

A number of channels at end X have not yet reconnected.

WP 5298.

Everything operating as expected.  ISI also nominal.

From Ed's summary yesterday, assumed to be the same, since no emails about changing to Laser Hazard:

We are currently LASER SAFE in the corner and the ends. PSL is shuttered, CO2 LASERs are OFF. End station Viewports and tables are closed and locked. Not sure about the on/off statues of the ALS.

• Dust - all monitors, except optics lab and bakeout, are green, i.e. low counts.
• CDS overview - some red
• CDS DAQ - all GPS readbacks updating

Timeline - Last night:

• 6:38PM - HAM6 people out of LVEA

Timeline - This morning:

• 7:40AM - MattH into LVEA
• 7:48AM - Karen and Christine in LVEA
• 7:58AM - MattH out of LVEA
• 8:10AM - MattH into LVEA
• 8:15AM - Corey to Squeezer Bay - and back
• 8:35AM - Hugh to EX
• 8:47AM - Patrick/Daniel, WP5298
• 8:55AM - FilibertoC/PeterK/RichardM - WP5299 & WP 5300
• 9:06AM - Jason/Ed - EX Oplev
• 9:11AM - JoeD - Mids and End Stations to check fire extinguishers / lights

With a mix of old, really old, & non-functioning, I went ahead and replaced all H1 door handles and installed them such that all of these tables and the TCS tables are consistent (i.e. door handle opens the same way).  I gave a pile of keys to Richard (who will probably pass on to Peter K, LSO).  All tables are currently locked.

Calum, Matt, Kate

The floors around HAM6 were so spotless you could eat off of them. Thank you Karen and Christina!!!

A 4th cleanroom was added onto the current setup, along with 2 tables. We finished rinsing the last 2 panels with methanol. Drag wiped both uncoated and coated side of each panel at least 2x, and then added hardware.

Particle counts:

A while ago there was a request for representative spectra of current HAM ISI performance at LHO. I posted a number of documents like pngs, ascii data files and DTT xmls to T1500289 in the DCC. I've now posted a similar document for the ETMX BSC-ISI at T1500318. The data is from about 8 AM on June 11, during ER7, and it's not exhaustive, but useful for a quick snapshot of the BSC's current performance.

Calum & Kate

Finished unwrapping and inspecting all 26 panels of black glass. 100% of the parts made it in one piece and all of the coatings look good. This is great news! The panels are dusty, smudgy, and streaky; and will need to be cleaned (this was expected). The plan is to use a methanol rinse followed by drag wipping. 24/26 pieces of glass were rinsed 2x, so we're about halfway through the cleaning effort. Currently using 3 large cleanroom tables, but we'll need at least one more for prep work.

Two points of note for LLO:

1) The following parts were packaged between 2 sheets of float glass:

D1500054-101 & 102

D1500055-101 & 102

It was a good idea to protect the oddly shaped parts, but care should be taken when opening them because a couple pieces of the float (packaging) glass had chips and cracks and these were spread around the wrapping. Again these did their job and protected the black glass (which was in good shape) just a heads up.

2)  Some of the parts are double packed in the bubble wrap. Again caution when opening.

I set up an accelerometer on the beam tube and measured the accelerations as I simulated the tapping that I observed during cleaning, and my tapping experiment mentioned here: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=19038. Examination of the time series indicated that accelerations during typical taps reached about 1 m/s^2.  I suspect that some taps reached 1g. The figure shows spectra for metal vs. fist taps. The above link notes that I was unable to produce glitches while hitting the beam tube with my fist. The fist and metal taps both had about the same maximum acceleration of 1 m/s^2 (ambient acceleration levels are about 4 orders of magnitude lower), so the source of the difference in liberating the particles is probably not acceleration. Instead, it may be the change in curvature of the beam tube, which would be expected to be greater at higher frequencies. The responses from metal taps in figure 1 peak at about 1000 Hz while the fist taps peak at about 100 Hz. These results are consistent with a hypothesis that the metal oxide particles are liberated by fracture associated with changes in curvature rather than simple vertical acceleration.

When I was producing glitches in DARM for the link above, I noticed that we did not get glitches every metal tap but every several metal taps. I tried to quantify this by making many individual taps at several locations along the beam tube. Unfortunately, we lost lock with the first loud glitch and I did not get a chance to repeat this before the vent. Nevertheless, it would be good for DetChar to look for smaller glitches at the time of the taps given below. Allow a 1 second window centered around the times given below for my tap timing uncertainty. I tapped once every ten seconds, starting at ten seconds after the top of the minute so that there were six taps per minute.

UTC times, all on June 14

Location Y-1-8

20:37 - 20:38 every ten seconds

20:47 - 20:50 every ten seconds

Next to EY

20:55 - every ten seconds until loss of lock at 20:56:10