TITLE: 06/14 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
SHIFT SUMMARY:

More observing than last night, but there was another shorter wind storm (winds over 30mph) which prevented locking for 3+hrs.  Commissioing time was used for a Robert measurement and PRCL OLG.  Squeezer knocked H1 out of Observing for about 3min toward the end of the shift, but came back on its own.

LOG:

• H1 was on its way back to NLN at shift transition.
• 2318-2352 Pcal Lab (Tony & student)
• 2321-2326 Grabbing laptop in Cleaning Room (near CER) (Robert)
• LOCK#1 (handoff from Camilla):  2317 At NOMINAL_LOW_NOISE, but had a couple stragglers which held up OBSERVING a couple minutes.
  1. Had some SDF Diffs for ASC/ADS Lines a couple minutes after NLN---they went away on their own
  2. 2321 VIOLIN DAMPING guardian finished a final 5-min sleep
  3. 2322 Back to OBSERVING!
  4. 2351 LOCKLOSS!!
     1. Lockloss 1370821883:  There were some winds above the 20mph for the Corner Station.
• 2352 ETMY x-sensor correction made (jim, see his alog)
• LOCK#2:  For this one, it made it to NLN, but waited a 5-min for VIOLIN_DAMPING, and this time the CAMERA_SERVO node was the longer straggler
  • 0042 NOMINAL LOW NOISE
  • 0048 CAMERA SERVO node was completed and now officially at NLN
  •  
• 0018 Checking Corner Station DustMon pump (Tony)
• 0048-0121 COMMISSIONING time
  • 0048-0049 PRCL olg meas #1
  • 0049-0119 Robert Measurements
  • 0119-0120 PRCL olg meas #2
• 0115 Start to see wind speeds begin to peak above 30mph :(
• 0121-0219 OBSERVING
• 0219 LOCKLOSS (1370830764.658203):  EY has been having winds hitting the 30+ mph range.
• 0252 Observatory Mode to WIND & waiting out wind
  • 0410 Return to locking after signs of winds stabilizing/dropping
  • 0439-0458 Initial Alignment (since I couldn't touch up PRMI better and Check Mich Fringes didn't help)
• LOCK#3 0511-061
  • 0600 pseudo NLN, but had to wait for the Camera Servo to complete after about 13min.
  • 0612 OBSERVING (after riding out winds peaking in the mainly 30-40mph range which prevented locking for a solid 3+hrs.
• 0609 PIMode31 verbal twice, but it was damped fairly quickly--no action taken
• 0643-0645 Bumped OUT of OBSERVING due to Squeezer
  • 06:43:47 SQZ MANAGER log said:  "[FREQ_DEP_SQZ.run] Unstalling SQZ_OPO_LR"
  • Going to the OPO_LR node, the log's first line was:  "2023-06-15_06:43:46.953215Z SQZ_OPO_LR [LOCKED_CLF_DUAL.run] OPO servo output railing"
  • And then SQZ nodes were all actively doing things and returned to normal at 06:45:43.

At about 615pmPT (or 115utc), winds started peaking above 30mph (lockloss at 219utc), and have flattened out there with some peaks hitting 50mph.  Not as dire as last night, but it is a windy ruckus out.  Taking OBSERVATORY Mode to WIND, keeping ISC LOCK at LOCKING ARMS GREEN, and will assess in 1hr.  Oh there was also a 6.2 EQ from the Phillipines, but Seismic is already back to Calm.  (Time to make supper.)

If it's like yesterday, the winds started to die down after the sun went down around 9-10pm.

Jenne had me run a couple of PRCL OLG measurements this evening.  Referencing Camilla's measurement from alog #70451.

Measurement #1 ~00:49utc

The first measurement was done as soon as we were at NOMINAL LOW NOISE (had to wait a few min for the Camera Servo node to complete) at 0049utc.  Magnitude is 1 at 32.0Hz with phase of 24.1 deg.

(see attached 1st plot & file is at /ligo/home/corey.gray/dtt/prcl_olg_noise_full_lock_nln_0049_15062023.xml)

Measurement #2 ~01:19 utc

Second measurement was run after Robert performed PEM measurments.  Magnitude is 1 at 35.0 Hz with phase of 25.1 deg.

(see attached 2nd plot & file is at /ligo/home/corey.gray/dtt/prcl_olg_noise_full_lock_nln_0119_15062023.xml)

Another pretty windy day, I've been looking at the ETMY ISI to see if any changes can be made to help staying locked. Only easy thing I've found so far is turning off the off-axis sensor correction. Watching the outputs here, it is contributing to the ISI swinging  several microns. I don't think it will change much, but don't have a lot of other things to try, at the moment, and it probably can't hurt. I've accepted the diff in the observe file, so this shouldn't affect our ability to go to observe when Corey is done relocking.

Attached trend shows the St1 X cps on the top, on the bottom 2 different points of the X sensor correction path to show when I turned it off, green is the filter output, orange is the output of the downstream match bank where I turned off the output. When the sensor correction is on the CPS is mostly dominated by it at low frequency, swiinging almost 10 microns at points. With sensor correction off, when the orange trace goes to 0 on the bottom, the cps stops moving around so much.

EndX Station Measurement
During the Tuesday maintenace, the PCAL team(Rick Savage, Julianna Lewis, & Tony Sanchez) went to EndX with Working Standard Hanford aka WSH(PS4) and took an End station measurement.
The EndX Station Measurement was MOSTLY* 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 10:30am. LIGO-T1500062-v15 is attached. After we were done but before we left we took a new background measurement with the PCAL covers on.

First thing I do 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_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/

*After the Normal Measurment: Rick and I put the covers back on like normal, but we shuttered the Laser again, to try and get a backgorund measurement of the Rx Sphere with all of the covers on.
The GPS StartTime for this new measurement is 1370712650.

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 Rick Savage, Julianna Lewis, & Tony Sanchez.

TITLE: 06/14 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
SHIFT SUMMARY: some Observing time and a commissioning period today, planned to do calibration sensing function measurements but lost lock before these started.
LOG:

• Lockloss @ 17:41 UTC 1370799724 after 6h10 in NLN
  • due to PRCL ring up coinciding with small Earthquake, see 70442
• NLN at 19:05, Observing at 19:14 UTC
• Starting Commissioning period (with LLO) at 21:31 UTC, plans in 70449
• Lockloss @ 22:23 UTC 1370816616 after 3h18 in NLN
  • Taking No-SQZ data at the time, wind spiked up to 30mph at time of lockloss, 70454

IFO changes config changes today: SQZ angle 70440 and OMC DCPD balance.70453

TITLE: 06/14 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Commissioning
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 17mph Gusts, 9mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.21 μm/s
QUICK SUMMARY:

Arrived to H1 on its way back to NOMINAL LOW NOISE and received a day shift summary from Camilla. Much better weather-wise *knock on wood*.  No other notable issues while waiting for H1.

Lockloss @ 22:23 UTC 1370816616

I updated the LVEA_TEMP ioc, which tracks rate of change for LVEA temperatures, to fix a bug in its alarm queue.

Naoki, Vicky

To try damping the 80 kHz PI recently causing locklosses (LHO:70434), today we installed a new path on PI28, with drive sent to ETMX. To phase-lock the ESD damping drive to the PI mode, we bandpassed the DCPD signal around 80.296 kHz (foton here). This frequency was chosen based on the DCPDs full-spectrum signal around 80.3 kHz, which today we saw the 3 peaks in red here between 80.295-80.301 kHz in full lock. It seems like our problem is the bigger peak around *296, where pink cursors are centered. We are trying to damp on ETMX first, since it seems like PI29 80kHz damping on ETMX could impact this mode.

The new path for PI28 has been updated and damping is guardianized, but this PI28 damping is untested, and there are no verbal alarms for PI28 yet.

Summary with the current status of PI damping:

SDFs were recoinciled after, see screenshots -- mainly, we un-monitored guardian-controlled things like the damping phase and PLL integrator.

Brina, Sheila

The DCPD balance matrix is normally set by Jeff using the method described in 47217.  Today I wanted to try setting the matrix so that the contribution of the two sensors to the DARM loop gain is set to be equal, because I think this will make it easier to correct for the imbalance of the PDs while doing the offline cross correlation.  I compared pcal line heights in the DCPD_A and DCPD_B at 17.1 Hz (A/B = h = 1.0277) and at 410.3Hz (A/B = 1.0362).  We chose the 17Hz value, and calculated the matrix elements for DCPD A to the SUM 2/(h+1) = 0.9863 and B to the sum 2h/(h+1) = 1.0137.  

The attached text file has commands used to copy and paste into a guardian shell to swap the DARM loop to one DCPD, and change the matrix elements.  After doing the swap we measured the DARM OLG, which is the live trace in the attached dtt template. 

no sqz start: 1370816035 (Jun 14 2023 22:13:37 UTC). lockloss: 22:23:18 UTC, we were just sitting there collecting data with no SQZ.  The matrix elements have been reset by SDF.

Last done in alog 70160. Measurement taken after 2h35 in NLN.

Magnitude is 1 at 26.5Hz and 26.5degrees. Plot attached.

Commissioning period,

The Ham1 FF was turned off for testing on 06/14/23 21:32:15. It stayed off for 5 minutes and was turned back on at 21:37:15.

This commissioning period has been coordinated with LLO. Plans for the next ~2 hours:

• HAM1 FF off test for 5 mins - Brina
• PRCL OLG - Camilla 
• No sqz time and DCPD matrix adjustments - Sheila 
• In parallel, PI damping path setup - Vicky and Naoki
• EX camera set up and HVAC on/off - Robert
• Calibration sensing sweep - CAL team 

Edited: due to lockloss we did not complete EX camera set up, or calibration sweep. Sheila only got 10 minutes of data rather than the 15 minutes wanted. 

Famis Task: 23750

I wanted to just swap the pumps with the one below the table but couldn't reach the pump rebuild log https://dcc.ligo.org/LIGO-Q2200010 because i didn't have any internet at the end stations and couldn't determine if the spares had been rebuilt already or not.

EX
Dust pump number 2950 Not running and Unplugged.
I checked the Log and noticed that pump 2950 only lasted 2 months. But the pump below the table was newly built around the same time.
So I'm going to Leave the Famis Task open until I can swap out the pump.

EY
Dust pump was Running pressure was 19.5 inHg.
No temps over 151F .

Corner Station
Dust pump number 1194 Power not switched on.
Spare 1119313238 has also been rebuilt and is ready to be swapped out.

I will try to swap these out Tomorrow or Tuesday.

Naoki, Vicky

In alog70212, Vicky stepped ZM5/6 P/Y by 100 count (-100 count for ZM6 P) to check the sensing matrix of SQZ ASC. We checked the response of AS A/B RF42 as shown in the attached ndscope. The measured sensing matrix is as follows.

It seems the AS B RF42 has some P/Y cross coupling (or ZM5 driving has P/Y cross coupling?), but apart from that, the input matrix of SQZ ASC should be proportional to the inverse matrix of the measured sensing matrix, which can be calculated as follows.

The current input matrix for SQZ ASC is shown in the second attached figure. The POS and ANG correspond to the ZM5 and ZM6, respectively. Compared with the calculated matrix above, the current input matrix seems not correct. The correct input matrix should be proportional to the calculated matrix above and I propose a new input matrix as follows, which is larger than the calculated matrix by a factor of -10. This factor of -10 is chosen to have the same order of input matrix as the current one and it can be adjusted depending on the desired UGF of SQZ ASC. We will try this new input matrix soon.