Jennie W, TJ

See attached images for the SDFs I reverted which were just used for our A2L measurements (mostly TRAMPS or filter settings in ADS YAW7 and PIT7 banks which were used for injecting our A2L tuning lines but are not used normally).

The only ones I accepted were the updated DRIVEALIGN gains used to minimise the A2L coupling.

After the commissioning period this morning where I tuned A2L gains, Naoki tuned the squeezer, and Sheila updated the MICH FF we gained noticeably at frequencies above 60 Hz and between 18 Hz to 23 Hz.

We are noticeably worse below 12 Hz.

See attached plot.

The template is stored in /jennifer.wright/Documents/ASC/20240610_DARM_pre_post_A2L_tuning.xml

Closes FAMIS 25995, everything looks good at high frequency.

ITMY_ST2_CPSINF_H1 looks elevated below 10 Hz

ETMY_{ST1,ST2}s overall noise looks reduced below 10 Hz

Jennie W, Sheila

Sheila wanted me to look at how good our optical gain is doing since the burn on the OFI that roughly happened (we think) on the 22nd April.

Before this happened we made a measurement of the OMC alignment using dithers on the OMC ASC degrees of freedom. We got a set of new alignment offsets for the OMC QPDs that would have increased our optical gain but did not implement these at the time.

After the OFI burn we remeasured these alignment dithers and found a similar set of offsets that would imrpove our optical gain. Thus I have assumed that we would have achieved this optical gain increase before the OFI burn if we had implemented the offset changes then.

Below is the sequence of events then a table stating our actual or inferred optical gain and the date on which it was measured.

Optical gain before vent as tracked by kappa C: 2024/01/10 22:36:26 UTC is 1.0117 +/- 0.0039

Optical gain after vent: 2024/04/14 03:54:38 UTC is 1.0158 +/- 0.0028, optical gain if we had improved OMC alignment = 1.0158 + 0.0189 = 1.0347

SR3 yaw position and SR2 yaw and pitch positions were changed on the 24th April ( starting 17:18:15 UTC time) to gain some of our throughput back.

The OMC QPD offsets were changed on 1st May (18:26:26 UTC time) to improve our optical gain - this improved kappa c by 0.0189.

Optical gain after spot on OFI moved due to OFI damage: 2024-05-23 06:35:25 UTC 1.0051 +/- 0.0035

SR3 pitch and yaw positions and the SR2 pitch and yaw positions were changed on 28th May (starting at 19:14:34 UTC time).

SR3 and SR2 positions moved back to pre-28th values on 30th May (20:51:03 UTC time).

So we still should be able to gain around 0.0296 ~ 3% optical gain increase, provided we stay at the spot on the OFI we had post 24th April:

SR2 Yaw slider = 2068 uradians
SR2 Pitch slider = -3 uradians

SR3 Yaw slider = 120 uradians

SR3 Pitch slider = 438 uradians
 

Mon Jun 10 10:11:12 2024 INFO: Fill completed in 11min 7secs

Travis confirmed a good fill curbside

Naoki, Sheila

To investigate the origin of whistles and rms increase in FC IR signal as reported in 78263 and 78344, we turned off the FC green VCO lock after FC IR transition.

In TRANSITION_IR_LOCKING state of SQZ_FC guardian, the FC CMB servo is disabled after FC IR transition. Since we use the green QPD at FC trans for beam spot control, we also turned off the beam spot control. The SDF is accepted as shown in the attachment.

After getting the OK for operations ABOVE 10W for H1 yesterday, I forgot to post anything looking at pressure sensors during higher power locklosses/operations yesterday/today.  So here is a look from the last 24hrs.

Jennie W, Sheila, TJ

This is done to reduce the coupling we get to length from having off-centre spot positions on the mirrors.

The script can be found in userapps/isc/common/scripts/decoup/a2l_min_generic_LHO.py .

See the steps the script runs in the bottom two plots and the reponse of the ADS demodulated signals in the top plots.

I ran ETMX P and Y first by calling the script with

python a2l_min_generic_LHO ETMX BOTH

changed P and Y

H1:SUS-ETMX_L2_DRIVEALIGN_P2L_SPOT_GAIN => 3.22

H1:SUS-ETMX_L2_DRIVEALIGN_Y2L_SPOT_GAIN => 4.99

ETMY

both P and Y changed

H1:SUS-ETMY_L2_DRIVEALIGN_P2L_SPOT_GAIN => 4.3

H1:SUS-ETMY_L2_DRIVEALIGN_Y2L_SPOT_GAIN => 0.92

ITMX

both P and Y changed

H1:SUS-ITMX_L2_DRIVEALIGN_P2L_SPOT_GAIN => -0.99

H1:SUS-ITMX_L2_DRIVEALIGN_Y2L_SPOT_GAIN => 2.88

ITMY

H1:SUS-ITMY_L2_DRIVEALIGN_P2L_SPOT_GAIN => -0.36

H1:SUS-ITMY_L2_DRIVEALIGN_Y2L_SPOT_GAIN => -2.5
 

16:35:52 UTC all A2L gains set and script finished.

FAMIS 20701

No major events for this week, but I am noticing that the PMC TRANS/REFL drifting we've been seeing for a couple months now has somewhat settled down. Thinking this might relate to how we've had an unlocked IFO for longer periods of time in recent days, I trended this against IFO range, but I don't notice a strong correlation.

GV20 AIP went red yesterday, about 22:43 utc time.  We will take a look at the controller for this unit as soon as posible, failure is unusual, as of right now it appears as if the controller failed, per trend of adjecent gauges the internal pressure does not appear to be affected.  No further action is required at this moment.

TITLE: 06/10 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 128Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 8mph Gusts, 5mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.14 μm/s
QUICK SUMMARY:

H1's OBSERVING!  (after no Observing for several days)

H1 has been locked at high sensitivity for 5.5hrs and observing just under that time.  Nuc30's DARM spectra is froze, so I'm trying to open it up again, or see if the nuc needs a reboot.  From what I can see, the violins are slowly ringing down from being rung up from the recovery time of the last few days.

Environmentally, all looks good with low winds, and microseism droping.  The higher frequency (3-30Hz) seismic seen around the corner station yesterday afternoon/eve was probably from the trucks & Genie for the film crew.

The Control Room is in a filming configuration as lighting and flim equipment is staged.

TITLE: 06/10 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing at 130Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY:

ASC DIFFS
LSC-MISCH2
and
SUS-ITMY_R0_OPTICALALIGN TRAMPS & OFFSETS
Please see Screenshot!

Also had to Init LOCKLOSS_SHUTTER GUARDIAN.... before OBSERVING.

Current H1 STATUS is NLN for 16 minutes and OBSERVING.

TITLE: 06/10 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 15mph Gusts, 11mph 5min avg
    Primary useism: 0.05 μm/s
    Secondary useism: 0.16 μm/s
QUICK SUMMARY:

Reverted to 1402011129 which is just after initial alignment.

lost lock again a number of times trying to get back to LOWNOISE_LENGTH_CONTROL
 

Started at line 5008 entering lines of code into guardian -i ISC_LOCK shell terminal
Lost lock @ Transition_From_ETMX after entering line 5092 from ISC_LOCK
ezca.get_LIGOFilter('SUS-ETMX_L3_LOCK_L').ramp_gain(0,    ramp_time=5, wait=False) #

Many attempts to lock DRMI later and a few Alignment touchups, we arrived at CARM to Analog where there were a number of saturatrions.

I have since reached higher lock states where I waited in LOWNOISE_COIL_DRIVERS, TRANSITION_FROM_ETMX, and LOWNOISE_LENGTH_CONTROL for a few minutes EACH after they finished.

Nuc30, the main DARM Screen is acting a fowl and is not runnign correctly agian. I tried rebooting but it refused to load the XFCE4 panel & windows manager correctly.

I have made it to OMC_WHITENING but I'm greated with the following ISC_LOCK messages:
The Violins are going down the Main culprits are EYM1, EXM8, and as per usual IYM5&6 !O.o!

2024-06-10_08:00:40.526574Z ISC_LOCK [OMC_WHITENING.run] USERMSG 0: EEEEEPP!  ADC Counts for the DCPDs are too high.  With whitening they would be 536240, larger than the 524288 available counts!  Cannot turn on OMC whitening! Stay here and damp violins

After we make it to NLN there will be a large number of SDF changes to accept.

TITLE: 06/09 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 14mph Gusts, 10mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.20 μm/s
QUICK SUMMARY:

Initial_Alignment was run, Locking process started and set to stop at LOWNOISE_FROM_ETMX so the next state can be troubleshot.

TITLE: 06/09 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: Tony
SHIFT SUMMARY:
 Tried to be better at noting main items in the alog today, but overall, we have received the OK for high power work from Jenne/Mike.  With this, spent most of the day with Keita remotely, Sheila via chat, and then Jenne joined remotely.  Have made it past 60W a few times, but have an issue at LOWNOISE LENGTH CONTROL.  The last hour or so H1 has had locklosses in early steps around DRMI and earlier, so Tony started an alignment.

The COSMIC film crew has been busy with set-up in the MPR, Roof, and Control Room.  (Richard and Mike have been working with them.)

LOG:

• Locking Notes:
  • Attempted to lock H1 and intentionally went through CHECK MICH FRINGES + PRMI.  Had DRMI lock, but it wasn't stable and would lose lock after a few seconds.
  • ~1550 Running INITIAL ALIGNMENT
    • AutoCenter for ALS-X needed the FORCE button to be toggled to get ALSx to align
    • Rest of INITIAL ALIGNMENT completed with no issue (thought there would be issues with SRC, as Tony experienced, but 
• 1730 Film Crew arrives, and Richard arrives
• 1735 Richard is doing work at LExC and I am his buddy until around noon.
• 1755 Mike (and Jenne) give approval for powering up ABOVE 10W (so this restriction has been lifted).
• 2046 Film crew making noises:  large trucks in the parking lot and then Richard asked if they could move the Genie Lift close to the vertix (near H2 Elec room) to move equipment on roof.
  • 2110 Genie let through the gate (richard)
• 2104 Lockloss at LOW NOISE LENGTH CONTROL (First time at 60W this weekend), and have not seen any jumps in pressure for any of the 10+W powers
• 2139 Grabbing fall protection harness from LVEA (richard)

Corey, (Jenne, Keita

For last few days, to lock the OMC, one needed to manual adjust SRM pointing to minimize POP90 before Locking the OMC---this was done from the ENGAGE SOFT LOOPS state (steps noted by Sheila and in  alog 78331).

To make this step easier in the future, went through the same process, but at the end, we wanted the ASC to take care of this in the future.  So,

• SRM was manually adjusted to minimize POP90 (from 9 down to 7)
  • So SRC1 p & y inputs turned OFF
  • SRM was moved to minimize pop90
• Then for SRC1 Pit, looked at the INMON and entered a smooth offset to make the INMON zero (so, the INMON was at around 0.1 and an offset of -0.1 was entered).  The same was done for SRC1Yaw.  Attached Here are the values: 
  • H1:ASC-SRC1_P_SMOOTH_OFFSET = -0.100
  • H1:ASC-SRC1_Y_SMOOTH_OFFSET = 0.830
  • Attached screenshot shows these new values from the ASC WFS SERVO CENTRAL medm
• Then the inputs for SRC1 Pit & Yaw were turned back ON (they were turned off to allow the manual SRM tweak).

And we are currently attempting the MAX POWER step on ISC LOCK.....but there is also some ground motion going on by the film crew's trucks and Richard is also going to be using the Genie Lift to help them put some equipment on the roof.