Both end station pumps running smoothly. The corner station pump (1194) must have over heated and kicked the breaker. One of the felt filters disentigrated and clogged the filter/muffler. This was cleaned out and put back together. A newer felt filter was added. The graphite veins seemed to be in fair condition. Pump 1194 was put back into service. I will check to see if it continues to run smoothly this after noon. More rebuild kits need to be ordered.

Ryan C, Camilla. We popped into commissioning to adjust the ETM ring heaters up from 1.0W to 1.1W/segment at 19:35 17:35UTC, accepted changes in sdf. Back in observing while the slow thermalization happens, plan to revert to nominal in 3 hours at 20:35UTC. This weeks past ring heater tests are 73093 and 73272.

Thu Oct 05 10:10:45 2023 INFO: Fill completed in 10min 41secs

Jordan confirmed a good fill curbside

Picket fence has not been updating recently. Ryan restarted the process on nuc5, which did not fix the issue.

Attached MEDM shows the 08:24 restart, a server uptime of only 2 mins, and no update for 24 mins.

We are investigating.

TITLE: 10/05 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 154Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 7mph Gusts, 5mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.15 μm/s
QUICK SUMMARY:

• We've been locked for 24:30, in observing since 22:46UTC
• CDS/SUS/VAC/Dust/SEI looks good
• A few more earthquakes came through in the morning

TITLE: 10/04 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 155Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:

- 23:34 - inc. 5.4 EQ from Japan

- 2:02 - inc 5,4 EQ from Papua New Guinea, 2:11 EQ mode activated, 2:16 - another 6.1 in Japan, successfully rode out (peakmon peaked at 2000)!

- 2:10 - Superevent S231005j

- EX saturations @ 3:11

- 6:39 - Looks like another EQ from Japan, 5.6 in magnitude

• Despite all the low to moderate magnitude EQs, H1 was able to ride out through the night, now locked for about 16:30 hours

LOG:

No log for this shift.

H1 has been locked for about 12:30 hours. Currently attempting to ride out a few EQs from Japan (most notably a 6.1) that caused a good amount of motion, but we're still kicking. Also, had a superevent (S231005j) earlier in the evening.

Today, during commissioning time and between 12:30 and 3:40 PM, I did the following.

1) Impulse injections at EX - this was to investigate whether the coupling at EX will be greatly reduced by damping the cryobaffle or if there is a secondary coupling site.

2) Increasing the 9.8 ITM bounce mode amplitudes by injecting into M0 Test V for the ITMs - this was to make sure that they were not responsible for the ~10 Hz harmonics that we sometimes see in the 20-100 Hz band.

3) Injecting in the LVEA to try and find the mystery vibration coupling (https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=72778).

It was clear that I did not produce noise in the 20-100 Hz band with my ITM bounce mode injections, but I havent yet analyzed the data from the other two tests.

TITLE: 10/04 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: SEISMON_ALERT
    Wind: 19mph Gusts, 15mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.15 μm/s 
QUICK SUMMARY:

- H1 has been locked for just over 8:30 hours

- SEI/CDS/DMs ok

TITLE: 10/04 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
INCOMING OPERATOR: Austin
SHIFT SUMMARY: We've been locked all day 8:30 so far, and just finished up commissioning for the day.

Norco arrived at 15:35UTC and started down Xarm at 15:45 and was parking at MX at 15:54 and was leaving around 17:25.

We started commissioning at 19:00UTC with a calibration sweep (19:03 to 19:33). I also manually restarted NUC26 which had frozen late last night. Robert wrapped up around 22:45UTC form his PEM injections and swept the LVEA as he left.

Camilla made the ring heater changes at 19:35UTC and undid them at 22:35UTC.

Back into observing at 22:46UTC    

LOG:                                                                                                       

Starting RH changes at 19:35UTC, turned up ITM RHs +0.1W and down ETM RHs -0.1W. Plots of DARM and HOM after 2 hours attached and ndscope trend. High frequency noise increased and the HOM moved higher in frequency. Circulating powers increased. After 3 hours at 22:35UTC I turned RHs back to nominal.

During this time Robert was doing some PEM injections and we had been locked at NLN for 5 hours so weren't completely thermalized at the start.

I added a 6600 to 6800Hz BLRM as H1:OAF-RANGE_RLP_8 to monitor high frequency noise, see attached, didn't prove very useful. H1:SQZ-DCPD_RATIO_6_DB shows trend better.

Last weeks test 73093. Future tests: Can't go the other direction as ITMY started with 0W RH. Could try commonly turning up just ETMs in a future while observing test as we had decreased high frequency noise with both ETM RHs ~1.4W/seg in February 67501, plot attached.

I ran a calibration sweep today, starting with the BB then simulines.

BB output: /ligo/groups/cal/H1/measurements/PCALY2DARM_BB/PCALY2DARM_BB_20231004T190400Z.xml

Simulines:

GPS start: 1380481801.115491

GPS stop: 1380483144.778068

2023-10-04 19:32:06,617 | INFO | File written out to: /ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20231004T190945Z.hdf5
2023-10-04 19:32:06,638 | INFO | File written out to: /ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20231004T190945Z.hdf5
2023-10-04 19:32:06,650 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20231004T190945Z.hdf5
2023-10-04 19:32:06,662 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20231004T190945Z.hdf5
2023-10-04 19:32:06,674 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20231004T190945Z.hdf5

 

We've been locked and observing since 14:47UTC, we plan to commission from 19:00UTC to 23:00UTC. Plans include a calibration sweep, ring heater test, and PEM injections.

TITLE: 10/04 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 3mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.18 μm/s
QUICK SUMMARY:

• We've been locked for 30 minutes, in observing since 14:47UTC
  • Looks like the lockloss (11:46UTC) in the early morning was from an earthquake (6.4 Philippines)
• CDS/SUS/VAC/Dust looks good
• The MX airhandler has lost connection

J. Oberling, F. Mera

This morning we swapped the failing laser in the ITMx OpLev with a spare.  The first attached picture shows the OpLev signals before the laser swap, the 2nd is after.  As can be seen there was no change in alignment, but the SUM counts are now back around 7000.  I'll keep an eye on this new laser over the next couple of days.

• Old laser SN: 191-1
• New laser SN: 119-2

This completes WP 11454.

First ENDX Station Measurement:
During the Tuesday maintenace, the PCAL team( Rick Savage & Tony Sanchez) went to ENDX with Working Standard Hanford aka WSH(PS4) and took an End station measurement.
But the Upper PCAL BEAM had been move to the left by 5 mm last week. See alog https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=72063.
We liked the idea of doing a calibration measurement with the beam off to the left just to try and see the effects of the offset on the calibration.

Because of limitations of our analysis tool which names files with a date stamp, the folder name for this non nominal measurement is tD20230821 even though it actually took place on Tuesday 2023-08-22.

Beam Spot Picture of the Upper Beam 5 mm to the Left on the apature
Martel_Voltage_Test.png
Document***
WS_at_TX.png
WS_at_RX.png
TX_RX.png
LHO_ENDX_PD_ReportV2.pdf
https://svn.ligo.caltech.edu/svn/aligocalibration/trunk/Projects/PhotonCalibrator/measurements/LHO_EndX/tD20230821/

We then Moved the PCAL BEAM back to the center, which is its NOMINAL position.
We took pictures of the beam spot.

Second NOMINAL End Station Measurement:
Then we did another ENDX Station measurement as we would normally do which is appropriately documented as tD20230822.
The second ENDX Station Measurement was carried out according to the procedure outlined in Document LIGO-T1500062-v15, Pcal End Station Power Sensor Responsivity Ratio Measurements: Procedures and Log, and was completed by noon.
We took pictures of the Beam Spot .

Martel:
We started by setting up a Martel Voltage source to apply some voltage into the PCAL Chassis's Input 1 channel and we record the times that a -4.000V, -2.000V and a 0.000V signal was sent to the Chassis. The analysis code that we run after we return uses the GPS times, grabs the data and created the Martel_Voltage_Test.png graph. We also did a measurement of the Martel's voltages in the PCAL lab to calculate the ADC conversion factor, which is included on the document .

After the Martel measurement the procedure walks us through the steps required to make a series of plots while the Working Standard(PS4) is in the Transmitter Module. These plots are shown in WS_at_TX.png.

Next steps include: The WS in the Receiver Module, These plots are shown in WS_at_RX.png.

Followed by TX_RX.png which are plots of the Tranmitter module and the receiver module operation without the WS in the beam path at all.

All of this data is then used to generate LHO_ENDX_PD_ReportV2.pdf which is attached, and a work in progress in the form of a living document.

All data and Analysis has been commited to the SVN.
https://svn.ligo.caltech.edu/svn/aligocalibration/trunk/Projects/PhotonCalibrator/measurements/LHO_EndX/tD20230822/

PCAL Lab Responsivity Ratio Measurement:
A WSH/GSHL (PS4/PS5)BackFront Responsivity Ratio Measurement was ran, analyzed, and pushed to the SVN.
The analysis of this measurement produces 4 PDF files which we use to vet the data for problems.
raw_voltages.pdf
avg_voltages.pdf
raw_ratios.pdf
avg_ratios.pdf

All data and Analysis has been commited to the SVN.
https://svn.ligo.caltech.edu/svn/aligocalibration/trunk/Projects/PhotonCalibrator/measurements/LabData/PS4_PS5/

I switched the order of the lab Measurements this time to have the Front Back Last this time to see is it changed the relative difference between FB and BF measurements.
PCAL Lab Responsivity Ratio Measurement:
A WSH/GSHL (PS4/PS5)FrontBack Responsivity Ratio measurement was ran, analyzed, and pushed to the SVN.
The analysis of this measurement produces 4 PDF files which we use to vet the data for problems.
raw_voltages2.pdf
avg_voltages2.pdf
raw_ratios2.pdf
avg_ratios2.pdf

This adventure has been brought to you by Rick Savage & Tony Sanchez.

J. Kissel, J. Driggers

I was brainstorming why LOWNOISE_LENGTH_CONTROL would be ringing up a Transmon M1 to M2 wire violin mode (modeled to be at 104.2 Hz for a "production" TMTS; see table 3.11 of T1300876) for the first time on Aug 4 2023 (see current investigation recapped in LHO:72214), and I remembered "TMS tracking..."

In short: we found that ETMX M0 L OSEM damping error signal has been fed directly to TMSX M1 L path global control path, without filtering, since Sep 28 2021. Yuck!

On Aug 30 2021, I resolved the discrepancies between L1 and H1 end-station SUS front-end models -- see LHO:59772. Included in that work, I cleaned up the Tidal path, cleaned up the "R0 tracking" path (where QUAD L2 gets fed to QUAD R0), and installed the "TMS tracking" path as per ECR E2000186 / LLO:53224. In short, "TMS tracking" couples the ETM M0 longitudinal OSEM error signal to the TMS M1 longitudinal "input to the drivealign bank" global control path, with the intent of matching the velocity of the two top masses to reduce scattered light.

On Aug 31 2021, the model changes were installed during an upgrade to the RCG -- see LHO:59797, and we've confirmed that I turned both TMSX and TMSY paths OFF, "to be commissioned later, when we have an IFO, if we need it" at
    Tuesday -- Aug 31 2021 21:22 UTC (14:22 PDT) 

However, 28 days later,
    Tuesday -- Sept 28 2021 22:16 UTC (15:16 PDT)
the TMSX filter bank got turned back on, and must have been blindly SDF saved as such -- with no filter in place -- after an EX IO chassis upgrade -- see LHO:60058. At the time, that RCG 4.2.0 still had the infamous "turn on a new filter with its input ON, output ON, and a gain of 1.0" feature, that has been since resolved with RCG 5.1.1. So ... maybe, somehow, even though the filter was already installed on Aug 31 2021, the IO chassis upgrade rebuild, reinstall, and restart of the h1sustmsx.mdl front end model re-registered the filter as new? Unclear. Regardless this direct ETMX M0 L to TMSX M1 L path has been on, without filtering, since Sep 28 2021. Yuck!

Jenne confirms the early 2021 timeline in the first attachment here.
She also confirms via a ~2 year trend of the H1:SUS-TMSY_M1_FF_L filter bank's SWSTAT, that no filter module has *ever* been turned on, confirmed that there's *never* been filtering.

Whether this *is* the source of 102.1288 Hz problems and that that frequency is the TMSX transmon violin mode is still unclear. Brief investigations thus far include
    - Jenne briefly gathered ASDs of ETMX M0 L (H1:SUS-ETMX_M0_DAMP_L_IN_DQ) and TMSX M1 L OSEMs' error signal (H1:SUS-TMSX_M1_DAMP_L_IN1_DQ) around the time of Oli's LOWNOISE_LENGTH_CONTROL time, but found that at 100 Hz, the OSEMs are limited by their own sensor noise and don't see anything.
    - She also looked through the MASTER_OUT DAC requests (), in hopes that the requested control signal would show something more or different, but found nothing suspicious around 100 Hz there either.
    - We HAVE NOT, but could look at H1:SUS-TMSX_M1_DRIVEALIGN_L_OUT_DQ since this FF control filter should be the only control signal going through that path. I'll post a comment with this.

Regardless, having this path on with no filter is clearly wrong, so we've turned off the input, output, and gain accepted the filter as OFF, OFF, and OFF in the SDF system (for TMSX, the safe.snap is the same as the observe.snap).

The ISS Second Loop engaged this lock with a low-ish diffracted power (about 1.5%).  Oli had chatted with Jason about it, and Sheila noticed that perhaps it being low could be related to the number of glitches we've been seeing.  A concern is that if the control loop needs to go "below" zero percent (which it can't do), this could cause a lockloss.

I "fixed" it by selecting IMC_LOCK to LOCKED (which opens the ISS second loop), and then selecting ISS_ON to re-close the second loop and put us back in our nominal Observing configuration.  This set the diffracted power back much closer to 2.5%, which is where we want it to be.

ENDY Station Measurement
During the Tuesday maintenace, the PCAL team(Julianna Lewis & Tony Sanchez) went to ENDY with Working Standard Hanford aka WSH(PS4) and took an End station measurement.
The ENDY Station Measurement was carried out according to the procedure outlined in Document LIGO-T1500062-v15, Pcal End Station Power Sensor Responsivity Ratio Measurements: Procedures and Log, and was completed by 11 am.

First thing we did is take a picture of the beam spot before anything is touched!

Martel:
We started by setting up a Martel Voltage source to apply some voltage into the PCAL Chassis's Input 1 channel and we record the times that a -4.000V, -2.000V and a 0.000V signal was sent to the Chassis. The analysis code that we run after we return uses the GPS times, grabs the data and created the Martel_Voltage_Test.png graph. We also did a measurement of the Martel's voltages in the PCAL lab to calculate the ADC conversion factor, which is included on the document.

After the Martel measurement the procedure walks us through the steps required to make a series of plots while the Working Standard(PS4) is in the Transmitter Module. These plots are shown in WS_at_TX.png.

Next steps include: The WS in the Receiver Module, These plots are shown in WS_at_RX.png.

Followed by TX_RX.png which are plots of the Tranmitter module and the receiver module operation without the WS in the beam path at all.
The last picture is of the Beam spot after we had finished the measurement.
All of this data is then used to generate LHO_ENDY_PD_ReportV2.pdf which is attached, and a work in progress in the form of a living document.

All data and Analysis has been commited to the SVN.
https://svn.ligo.caltech.edu/svn/aligocalibration/trunk/Projects/PhotonCalibrator/measurements/LHO_ENDY/

PCAL Lab Responsivity Ratio Measurement:
A WSH/GSHL (PS4/PS5)FrontBack Responsivity Ratio Measurement was ran, analyzed, and pushed to the SVN.
The analysis of this measurement produces 4 PDF files which we use to vet the data for problems.
raw_voltages.pdf
avg_voltages.pdf
raw_ratios.pdf
avg_ratios.pdf

All data and Analysis has been commited to the SVN.
https://svn.ligo.caltech.edu/svn/aligocalibration/trunk/Projects/PhotonCalibrator/measurements/LabData/PS4_PS5/

A surpise BackFront PS4/PS5 Responsivity Ratio appeared!!
PCAL Lab Responsivity Ratio Measurement:
A WSH/GSHL (PS4/PS5)BF Responsivity Ratio measurement was ran, analyzed, and pushed to the SVN.
The analysis of this measurement produces 4 PDF files which we use to vet the data for problems.
raw_voltages2.pdf
avg_voltages2.pdf
raw_ratios2.pdf
avg_ratios2.pdf

This adventure has been brought to you by Julianna Lewis & Tony Sanchez.