Sheila, Richard, Dave, Fil, Ed

The camera located at the Beam Splitter chamber (BSC2) has mac address 00:30:53:17:ce:75, IP address 10.106.0.49, IP name h1cam29 and is plugged into port GigabitEthernet0/35 of the CER switch sw-lvea-aux

I reprogrammed the unused CAM26 slot to display this camera's image. This is a temporary setup, we will align the cam name and slot number later.

We switched the BSC2 illuminator on and saw a good image.

Water levels are fine at this time as water was replaced following a trip on 7/24.

Continuing the work of 43055, the idea was to translate the beam on PR2 by moving IM3 and IM4, while looking ta the PR2 camera image to see if the alleged clipping on the right side of the PR2 scraper baffle changed.

The first plot below shows that by moving IM3 and IM4 quite a lot in both directions, it was not possible to improve the PRMI buildup. At the same time, no noticeable change was visible in the PR2 camera rightmost spot, which is believed to be some clipping on the edge of the PR2 baffle aperture.

All hf spectra looks to be nominal.

TITLE: 07/25 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: None
CURRENT ENVIRONMENT:
    Wind: 6mph Gusts, 5mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.09 μm/s
QUICK SUMMARY:

Craig, Jenne, Sheila

Tonight we hoped to increase PRMI buildups by going back to the June 21st 2018 10:00:00 UTC alignment using the top mass witness channels.  This sort of worked, as our buildups are now 20% better (POPAIR_B_RF18_NORM = 7, POPAIR_B_RF90_NORM = 19), but we did not achieve the power levels we had then (POPAIR_B_RF18_NORM = 27.5, POPAIR_B_RF90_NORM = 40.75): our sideband buildups are one fourth as high.  
All June/July locking power pales in comparison to Sheila's May PRMI/DRMI lock, something is still seriously wrong.

Sheila walked the beam using PR2_SPOT_MOVE to minimize scattering on the PR2 camera, then optimized buildups from there.  
Sheila and I doubled checked POPAIR_B and everything seems to be in order.  
Maybe it is time to double-check our 9 and 45 MHz modulation depths.

[Sheila, Haocun]

Today we went to the ISCT6 to continue the work on squeezing.

The SHG was still beabled to be locked, (temp tuned to 35.8C, got ~113mW IR in and ~23mW Green out), but the green beam was misaligned a little at the EOM.

I realigned it and coupled the green beam to fiber, and also did the coupling for CLF and SEED. The efficiencies are all 75% - 80%.

We ordered a fiber microscope, and it is still on the way. I did a rough check of the green path: ~8mW going into the long fiber, and ~7mW before the feedthrough. There are some sleeves that can be changed if needed.

Also did:

* Link ISCT6 AS air camera screen

* Homodyne diodes reading added

THe next step can be focused on SQZT6 mode matching/ fiber and optics located/ Homodyne electronics diagnostic.

15:15 Gerardo to EX

15:30 Jason, JeffB, RickS to PSL enclosure

15:45 Sheila, Hang to EY

17:30 Sheila refocusing PR2 camera, Marc & Fil working on illuminator

17:45 Mark & ChrisS to EX for ion pump install

18:00 Kyle to EX

18:30 Haocun & Sheila to ISCT6, Gabriele & Georgia to PR2 camera

20:00 Kara, Phillipe to LVEA for PEM microphones

20:15 Marc, Nolan, Daniel to LVEA/CER for PFD replacement

21:00 Haocun to ISCT6

21:00 Richard to BSC123 area

21:30 Corey to LVEA

21:30 Fil to LVEA

(Mark D, Tyler G, Chris S, Kyle R, Gerardo M)

GV 20 was closed and the main turbo pump at X-End was valved in to the main volume during the installation of IP12.  The chevron baffle volume was vented slow using UHP N2, as well as the IP body.

After Mark, Tyler and Chris were done installing the pump, the volume of the ion pump was roughed down to 1.0 torr using an aux cart, work will continue with this IP next week, since still needs to be pump down and leak tested.

After opening GV20, the main turbo pump was isolated, and shut down.  The aux cart flex lines remain connected to IP12 and the metal valve is closed at the IP.

Sheila, Craig

Sheila asked me to look at all our POP PDs during PRMI locks now (GPS=1216359318) and on June 21 (GPS=1213724178) for checking if the ASC and LSC POP PDs saw different relative levels of light.  
If the LSC POP PDs saw less light now, we would have smoking gun for clipping in the LSC_POPAIR path, since the LSC POP PDs monitor light returning from the beamsplitter.

ASC and LSC POP PDs have the same relative amount of light on them now as in June.

Results
Below are the results of the comparison.  The first column of numbers are associated with the June 21 PRMI lock, and the second is PRMI from two days ago.  The third column is the raw ratio of the PDs, and the fourth is normalized for the input power as read by IM4 trans.


Channel Name                               PRMI Locked Time 1,   PRMI Locked Time 2,  Ratio Time 2/Time 1,   Power Normed Ratio
GPSTimes                                           1213724178            1216359318

H1:IMC-IM4_TRANS_SUM_OUT_DQ                     284.918762207,        67.9162597656,       0.238370612264,                  1.0
H1:IMC-IM4_TRANS_PIT_OUT_DQ                    0.407760709524,       0.477381646633,        1.17073965073,        4.91142606735
H1:IMC-IM4_TRANS_YAW_OUT_DQ                    0.883432805538,       0.855117201805,       0.967948198318,        4.06068611145

H1:LSC-POPAIR_B_RF18_I_ERR_DQ                   195.512329102,        16.1139144897,      0.0824189186096,       0.345759570599
H1:LSC-POPAIR_B_RF18_Q_ERR_DQ                  -94.1860046387,       -3.70564484596,      0.0393439009786,       0.165053486824
H1:LSC-POPAIR_B_RF90_I_ERR_DQ                   286.353973389,        44.0622596741,         0.1538733989,       0.645521700382
H1:LSC-POPAIR_B_RF90_Q_ERR_DQ                  -75.2995452881,        2.58768701553,     -0.0343652404845,      -0.144167274237

H1:LSC-POPAIR_B_LF_OUT_DQ                       24.9877510071,        2.98662781715,        0.11952367425,       0.501419484615
H1:LSC-POP_A_LF_OUT_DQ                          242.602081299,         29.790473938,       0.122795626521,       0.515145838261

H1:ASC-POP_A_NSUM_OUT_DQ                        11.5149688721,        1.42900109291,       0.124099433422,       0.520615518093
H1:ASC-POP_A_PIT_OUT_DQ                         0.29082262516,       0.965587258339,        3.32019305229,        13.9287014008
H1:ASC-POP_A_YAW_OUT_DQ                       0.0495703965425,        0.11970166862,        2.41478133202,        10.1303653717
H1:ASC-POP_B_NSUM_OUT_DQ                        10.5879678726,        1.31313991547,        0.12402190268,       0.520290255547
H1:ASC-POP_B_PIT_OUT_DQ                        0.952069103718,        0.95118021965,       0.999066352844,        4.19123125076
H1:ASC-POP_B_YAW_OUT_DQ                       -0.530693173409,      -0.561689078808,        1.05840647221,         4.4401717186


Buildups in RF9 are one third of what they were in June, while buildups in RF45 are two thirds of what they were.  Overall power is half.  All PD power levels are consistent.
POP_A seems way off in both pitch and yaw, but POP_B is the same.  
I checked every PD for differences in the signal chain.  There were none except for POPAIR_B_RF18_PHASE_R going from 12.0 to 42.0 degrees, and POPAIR_B_RF90_PHASE_R changing from 24.0 to 49.0 degrees.

Sanity Check
We can estimate what the PRMI POPAIR_B_LF power ratio should be from the new modulation depths and our POPAIR_B sidebands:

J. Kissel, H. Yu
WP 7730
ECR E1800201
IIET Ticket 10975

Given the recent apparent** success of BSC ISI ST2 to Top Mass feed forward with the QUADs (see LHO aLOGs 42875 and 42906), we've pushed a similar feed forward path into the beam splitter SUS's infrastructure to test out success there, to see if we want to modify the ECR to include this as well.

**I say apparent, only because we haven't yet measured the feed-forward's impact with any global sensors. Locally, it's a win!

A fair warning, this feed forward will be more interesting:
- Longitudinal for the beam splitter isn't just one Cartesian DOF as it is for the test masses, so we may need to figure out a way to actuate the ISI in longitudinal. Hopefully this can be done without a model change.
- Because of the back-reaction on the cage to ST2 of the ISI BS, we don't turn on ST2 isolation until well after we lock MICH in the IFO's acquisition sequence. Thus we should be sure to characterize the beam splitter with ST2 ON.

Attached are screen shots of the affected models and medm screens.
    /opt/rtcds/userapps/release/isi/h1/models/
        h1isibs.mdl
    /opt/rtcds/userapps/release/sus/h1/models/
        h1susbs.mdl
    /opt/rtcds/userapps/release/sus/common/models/
        BSFM_MASTER.mdl

    /opt/rtcds/userapps/release/sus/common/medm/bsfm/
        SUS_CUST_BSFM_OVERVIEW.adl
        SUS_CUST_BSFM_M1_ISIFF.adl

At ≈ 21:00UTC the PSL tripped. The cause is TBD. I was able to successfully restart it without incident. 

[Georgia, Gabriele]

We went to the LVEA to focus the PR2 camera on visible light, with various setting of the illuminator on. We took a few images with various zoom levels, and then set a zoom that provides a good view of the scraper baffle aperture. The image below shows the view with the illuminator on and the final zoom level.

We then focused again the camera on the infrared beam. We also wrote a simple python script to superimpose the IR image (in red) with the reference visible light image (background). The results is shown below in single bounce configuration:

For reference, photos of the table can be found in 38749:

Summary:  Ran Charge measurements for ETMx & ETMy from 7:23-8:30amPDT a little early this morning for morning commissioning work.  There was a big EQ which occurred during this measurement.

Morning Activity:

• 13:52 Christina & Karen started LVEA work
• 14:14 ISI config to SC_OFF_NOBRSXY for Maintenance
• 14:23 Charge Measurements started/attempted...actually took 5-min to start due to ISC_LOCK Guardian*
  • Original alignment slider values noted below**
• 14:37 Bartlett out to work on PSL plumbing inspection
• 14:43 noticed EQ on seismic DMTs(...turns out to be a 5.2 & 5.6 EQs near Gold Beach, OR)
• 15:30 Measurement complete & restoring.  ETMs had been in an MISALIGNED guardian state...will leave ALIGNED.

* ISC_LOCK would not go to DOWN (said there was no path from READY to DOWN, & would go for PREP_FOR_LOCKING).  Took to MANUAL & then selected DOWN; stayed in MANUAL for measurements.

Checking Data/Files:

I had trouble running the matlab files to analyze the data last week.  So, for today I'm only checking to see that the data was posted.  Similar to last week, we have 5-sets of measurement folders which contain the usual 5-data files per quadrant.  Sending an email to Georgia & JeffK to let them know I ran the measurement & data ready for analysis.

Restoration Notes:

• ETMx had some SDF diffs, but they were already there & weren't me, so I will leave them as is.
• ETMy SDF diffs I made were restored (there were some others on the list; will leave them as is).
• Did not see any BIO diffs to change/restore for this measurement.

**ETM ALIGNED Slider values (before centering Oplevs)

ETMx:

• Pit:  124.7
• Yaw:  -132.3

ETMy:

• Pit:  128.7
• Yaw:  -122.3