TITLE: 10/17 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
INCOMING OPERATOR: Corey
SHIFT SUMMARY:

Lockloss from SQZrs PSAM activity.  
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1413215714

Relocking notes:
I had IMC Locking issues before entering into Initial_Alignment.

And then I had IMC Locking Issues in SR2 Alignment as well making Initial_Alignment incredibly difficult to Get into and Complete.
Sheila asked me to just take the IMC to Offline and wait until the PSL glitches.   

Reached Nominal Low Noise at 18:51 UTC

Commissioning activities started with:

• Josh's Osem injections Josh [Elenna requests start with PR3]
  Another Lockloss During Commissioning.
  https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1413231730
   
• 10 minutes CPS diff off in low noise [Jim]
• Noise propagation injections [Elenna]:  Jitter and intensity injections with carm on one sensor  [30 minutes, including retuning jitter injection to reach high frequencies]
• Contrast defect Elenna [20 minutes]
• 1 hour step PSAMs with ASC on [Vicky, Camilla]
• Check filter cavity detuning
• HAM1 injections [20 minutes] Sheila, Jim
• Injections for Brice:
• 3 different frequency lines into DARM
• Lines into LSC channels: DARM, SRCL and MICH (all at same sampling rate)
• Lines into DARM and two others at a different sampling rate: CHARD and DHARD
• Lines into 3 non-DARM channels (same sampling rate)
• Lines into 3 non-DARM channels (all different sampling rates)

More Issues with IMC Locking and Staying Locked.

LOG:
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    

TITLE: 10/17 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 14mph Gusts, 7mph 3min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.22 μm/s
QUICK SUMMARY:

Tony was addressing remaining items to allow H1 to get to OBSERVING at the beginning of my shift.  Environmentally, it's been windy the last 7hrs and has been slowly getting less windy; microseism is between the 50th & 95th percentile.  Jason is working on the spare NPRO in the Optics Lab.

Violin modes are about 2-orders of magnitude quieter than yesterday.

Sheila and I have been investigating the source of the PRCL/DARM coupling that we observe. As a part of this investigation, Sheila has already run two sets of projections that investigate the PRCL coupling to DARM through the other LSC degrees of freedom, and through CHARD P and Y. Those can be found here: alog 80212 and alog 78969.

Today, I took the frequency noise injection from the noise budget, and added that projection to the total. To the point: PRCL coupling to DARM through frequency noise is smaller than PRCL coupling through the other LSC degrees of freedom, therefore it is not a significant source of coupling of PRCL to DARM. Figure 1 shows the projection of PRCL noise to DARM directly, as well as the projection through other degrees of freedom. Figure 2 shows all DOFs projected to DARM.

Some details:

The PRCL and frequency noise injections were rerun as a part of noise budget injections in 80596. The PRCL injection was run while CARM was only on REFL B, to better estimate the PRCL coupling through frequency noise.

The frequency noise injection is run by using REFL A as an out-of-loop sensor with CARM only on REFL B, therefore the frequency noise projection on one sensor will be higher by sqrt(2) in regions where CARM is limited by shot noise. In the past, we've estimated this to be below 4kHz, although we haven't checked recently. The frequency noise projection to DARM in these plots is divided by sqrt(2).

The notebook used to make these plots is located in /ligo/gitcommon/NoiseBudget/simplepyNB/PRCL_frequency_projections.ipynb

TITLE: 10/17 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Commissioning
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 20mph Gusts, 13mph 3min avg
    Primary useism: 0.05 μm/s
    Secondary useism: 0.23 μm/s
QUICK SUMMARY:

Lockloss from SQZrs PSAM activity.  
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1413215714

Relocking notes:
I had IMC Locking issues before entering into Initial_Alignment.

And then I had IMC Locking Issues in SR2 Alignment as well making Initial_Alignment incredibly difficult to Get into and Complete.
Sheila asked me to just take the IMC to Offline and wait until the PSL glitches stopped so we waited abotu 20 minutes. 
Took ISC_LOCK back to down and started a Manual Initial_Alignment @ SR2 Align.  

Reached Nominal Low Noise at 18:51 UTC

Commissioning activities started with:

• Josh's Osem injections Josh [Elenna requests start with PR3]
• 10 minutes CPS diff off in low noise [Jim]
• Noise propagation injections [Elenna]:  Jitter and intensity injections with carm on one sensor  [30 minutes, including retuning jitter injection to reach high frequencies]
• Contrast defect Elenna [20 minutes]
• 1 hour step PSAMs with ASC on [Vicky, Camilla]
• Check filter cavity detuning
• HAM1 injections [20 minutes] Sheila, Jim
• Injections for Brice:
• 3 different frequency lines into DARM
• Lines into LSC channels: DARM, SRCL and MICH (all at same sampling rate)
• Lines into DARM and two others at a different sampling rate: CHARD and DHARD
• Lines into 3 non-DARM channels (same sampling rate)
• Lines into 3 non-DARM channels (all different sampling rates)
•  

Thu Oct 17 10:18:47 2024 INFO: Fill completed in 18min 42secs

Jordan confirmed a good fill curbside. TCs are looking nominal again.

Vicky, Camilla

Two things to note form this morning's commissioning time before we cause a lockloss while we turned off the new PSAMS filter limit, sorry :( 

1. When the OPO locks with a different PZT voltage (did before commissioning time started and we lost 1bD of SQZ and 3MPc range), the temperature needs to be adjusted to re-optimize squeezing, alignment via ASC isn;t enough to bring back good squeezing, see attached plot. First t-cursor is OPO PZT re-lock, seconds t-cursors is OPO temperature change. We also ran SQZ_SQZ_ANG but that didn't make much of a difference.
2. SQZ ASC worked well to bring back alignment after PSAMS changes, see plot, we reverted the PSAMs changes as didn't see SQZ get better/worse with ther different values tried.

TITLE: 10/17 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 160Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 7mph Gusts, 5mph 3min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.20 μm/s
QUICK SUMMARY:

The super moon setting behind the LIGO water tower was majestic as I pulled in to the parking lot today. I should have snapped a picture.
H1 is Observing again for 6 Hours now.
Looks like it was relocked by H1_MAN  last night after an Earthquake caused a Lockloss @ 6:29 UTC.

14:50 UTC -  SQZ_MAN just dropped us from Observing for a a moment.
14:53 UTC - We are back to Observing.

TITLE: 10/16 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Earthquake
INCOMING OPERATOR: TJ
SHIFT SUMMARY:
With environmental conditions improved (mainly winds dying down), this made for an easier night for H1 and also allowed for slowly damping down the violins to 3xe-18.
LOG:

• 0036 Held at MAX POWER a few minutes 
  • NOTE:  At TRANSITION FROM ETMX, just happened to notice OMC trans camera spot was moving quite a bit (but didn't see this on any of the FOM scopes).
  • 0059 Observing
• 0142 Lockloss
• 0247 Back to Observing

Recent report from LLO (LLO alog 73576) showed that the test that was sent from LHO to LLO broke because the hard stop was set to the low position and the bobbin/mirror assembly hit the stop hard.

While we were testing our "dirty spare" unit in the EE shop today, however, we have found that the same bobbin/mirror assy can break even when we're quite sure that it didn't hit the stop.

We set up the testing apparatus using the dirty spare FS, a spare driver D1400078 and FAST Shutter test board D1400208. We set the HV to 250V. We made sure that the hard stop was at its highest position.

The first 4 fast shutting motion was good, Fil and Betsy shot the slow-mo video and we are convinced that the bobbin/mirror assy didn't hit the stop. On 5th attempt, while nobody was shooting video, the mirror and a PEEK plate backing broke off and was shot into the air. On a closer inspection we see partial delamination of the glass and PEEK, but it's not like the delamination is the main reason why the PEEK failed. Also a small chunk of the glass was ripped apart from the mirror and left inside the bobbin where the glass was glued to the bobbin and the coil.

Betsy and Fil will post pictures/video later.

H1's had a bit of a rough go the last day(s). 
Just had a lockloss at LOWNOISE_ESD_ETMX with ASC signals getting noisy over 2-min prior to the lockloss (see attached for a look at the lead-up to the lockloss, with a burst seen on the Error Signals [mainly MICH P & Y] and then the slow ring-up for several ASC channels [with CHARD & CSOFT pitch signals being noticeable culprits].  Additionally, the PR GAIN channel also rung up with ASC.).

For the next lock, I'll pause at MAX POWER to see if this helps, and then watch ASC when stepping through next steps.

(Additionally--around the lockloss there was an earthquake bump (0.03-0.1Hz) around that time, AND we are also riding through increased winds for the last 3hrs...but they seem to be slowly calming down).

TITLE: 10/16 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Earthquake
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 23mph Gusts, 13mph 3min avg
    Primary useism: 0.07 μm/s
    Secondary useism: 0.21 μm/s
QUICK SUMMARY:

Walked in to Tony locking H1 at PRMI and he just left as it was on its way to MAX POWER.  (The DRMI lock & ASC step were a bit odd with POP18+90 making several sharp drops....but it obviously made it through that rollercoaster.)

Several EQs over last 24hrs; useism is squarely between the 50th & 90th percentile lines; winds had been elevated the last 2hrs, but appear to be dropping.

TITLE: 10/16 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Earthquake
INCOMING OPERATOR: Corey
SHIFT SUMMARY:

Found out why the Violins were being rung up.
Tj was right it was a settings issue, The coil drivers were cranked up to state 3.

After this was resolved:

16:55 UTC OMC_whitening, Can't get to NLN noise, violins too high for Whitening, Damping Violins.
17:43 UTC UTC Nominal_LOW_NOISE was reached! yay!
17:46UTC reached Observing!!!

18:05 UTC lockloss
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1413137125

NLN reached at 21:17:10 UTC Yay!!!
Lockloss 21:18:19 UTC
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1413148718

I noticed an IMC Fault.
I Believe this lockloss may have been caused by the FSS glitches.
A lockloss that was caused by a 35+MPH wind gust while we were in LOWNOISE_COILDRIVER[552]
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1413152106

TLDR: Day full of small Earthquakes, a wind gust and Some PSL FSS glitches meant that I had short locks today. One of which was only 1 minute long.

LOG:

TITLE: 10/16 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Earthquake
CURRENT ENVIRONMENT:
    SEI_ENV state: EARTHQUAKE
    Wind: 6mph Gusts, 3mph 3min avg
    Primary useism: 0.93 μm/s
    Secondary useism: 1.11 μm/s
QUICK SUMMARY:


16:55 UTC OMC_whitening, Can't get to NLN noise, violins too high for Whitening, Damping Violins.
17:43 UTC UTC Nominal_LOW_NOISE
17:46UTC reached Observing!!!

18:05 UTC  Earthquake lockloss
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1413137125

While trying to relock another earthquake struck.
Also Initial Alignment is acting strange in SRC_Align Offloaded, Sheila and I will work on this once the Quake passes.

Holding in IDLE.

Overnight the ITMX coil driver states were wrong, causing the ASC controls to satuate the PUM durring acquisition.  (This become aparent when the DHARD gains are increased at the end of DHARD WFS, which happens right before PARK_ALS_VCO 80699)

This used to be reset in ISC_LOCK PREP_FOR_LOCKING state, this has been commented out (line 618), with a note that SDF will take care of this, this has been commented out in the guardian for over a year.  Indeed. we found that the coil driver state was incorrectly set to 3

The attached screenshot shows the error was introduced to the safe.snap sometime between 2:30 and 5 pm yesterday, as it was correctly reset in the first two locking attempts of the day, but wasn't correctly reset after the lockloss at 5 local time last night. 

Ibrahim, Oli

Below are updates and promising findings concerning the most recent BBSS LHO Top Mass -4mm BP Adjustments to tackle the F1 Drift issue summarized in alog 80577.

On Friday 10/11, Oli P and I moved the blade positions (mm BP Units) to:

Front Left: Side: 0.02, Top: -4.03 Back Left: Side: -0.03, Top -3.90 Front Right: Side: 0.02, -3.91 Back Right: Side: -0.05, -3.95 Avg: Side: -0.01 Height: -3.95

Find:

• LHO Transfer Functions PDF
• LHO and LLO different Blade Positions Comparison PDF (essentially the plot from alog 80589 but with the newest 10/11 results).
• LHO BOSEM (Top Mass and PUM) Counts

The good news is that with these 4.5 days of Data, we see no sign of F1 Drift.

We will post another alog with TF to model comparisons as we find which model d1 parameter fits these -4mm BP positions best.

Gerardo, Janos

Reacting to the issue in aLog https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=80619, the GV10 AIP was swapped, as the pump broke down.

The AIP was swapped with a noble diode pump, as a lesson learnt from the latest AIP swap: https://alog.ligo-wa.caltech.edu/aLOG/index.php?callRep=80411.

The only difficulty was after swapping the pump and then pumping on the Annulus line, the old Varian controller did not work (the reason for its malfunction is now supposedly diagnosed), and so now the Ion pump runs with an Agilent IPC Mini controller. The downside of this is that the wiring of its data cable is not compatible with the current CDS setup, and therefore on the MEDM screen the AIP still appears as faulty - see picture attached. The controller will be replaced shortly, after the Varian controller is fixed. Until then, the Agilent controller will be periodically checked.

Nevertheless, the Noble-diode pump proved to be an excellent choice again, as it pumped the Annulus volume down pretty quickly (in about 7 minutes) below 1E-6 Torr.

A slow motion video of the fast shutter, firing with the high voltage driver in air, is here:  slow motion video