TITLE: 06/22 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 18mph Gusts, 13mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY: Corey is working on locking DRMI; he's ran an alignment and MICH_FRINGES has run, but buildups still don't look good. We'll keep working at it.

• Wind is elevated wiht gusts up to 30mph in the past couple hours
• Microseism is low
• All other systems nominal

Just completed the Saturday Calibration mesurement with L1 & V1.  H1's been locked 12hrs.  Winds are picking up slightly, outside temp is 88degF.

Coordinated with LLO & Virgo a few times for this--3hrs & 15min (via TeamSpeak) before the Calibration.  And then about 2min before 1830utc (1130amPT), I spoke with each operator for a final reminder and then jumped into it.

NOTE:  So, I knew about this measurement (which I'm fairly new at still) because of our Operator Checksheet, where this measurement is listed as 1130amPT.  Also, on the LHO Control Room whiteboard, Saturday at 1130amPT there is a note.  For a more official document for O4b Calibration measurements, Jenne pointed me to the document (L2400036).  In this document the times for the calibration measurements are listed in Sec3.3.  In the Ops Wiki Calibration Instruction page, old times were listed (mainly the wednesday dates).  For O4b, we now run these calibrations on Thursdays at 830amPT & Saturdays at 1130amPT---I updated the wiki to show this.

Measurement NOTES:

• 18:30:00 Received reminder for Calibration measurement (should this be earlier for a warning?)
• Following instructions (link)
• H1 is thermalized (locked for over 11hrs)
• Calibration_Monitor medm screenshot is attached
• 18:30:14  ISC LOCK to NLN_CAL_MEAS & Observatory Mode to COMMISSIONING
• 1830 - 1835 Broadband measurement run
  • Measurement at:  /ligo/groups/cal/H1/measurements/PCALY2DARM_BB/
• 1835:40 - 1857:14 Simullines measurement
  • gps START time:  GPS:  1403116559.460699
  • gps END time:  GPS: 1403117852.165272
  • Files writtten to subfolders here:  /ligo/groups/cal/H1/measurements

Sat Jun 22 10:08:35 2024 INFO: Fill completed in 8min 32secs

TITLE: 06/22 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 6mph Gusts, 4mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

H1's been locked the last 7.5hrs and it's very quiet seismically.  Today's forecast high is around 98degF.

Nuc33's gwistat webpage needed to have the tab/webpage reloaded.

TITLE: 06/22 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing at 155Mpc
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY: One candidate event and three locklosses from observing this shift; one from an EQ and two that weren't obvious as to a cause. We had a few hours of downtime this shift just from locklosses in random places that I can't seem to explain (states like ALS, FIND_IR, DRMI, and one in TRANSITION_FROM_ETMX). Eventually H1 made it back to NLN and has been observing for about an hour.

• 00:40 - S240622h
• 01:17 - Lockloss (EQ) - alog78581
• 02:15 - Resumed observing; automatic relock
• 03:22 - Lockloss - alog78583
• 05:19 - Resumed observing; needed some help during DRMI
• 05:20 - Lockloss - alog78584
  • 06:08 - Lockloss during TRANSITION_FROM_ETMX
• 07:06 - Resumed observing; automatic relock, but did take longer

LOG:

Lockloss @ 03:22 UTC - link to lockloss tool

No obvious cause; ground motion was calm at the time.

Lockloss @ 01:17 UTC - link to lockloss tool

Looks like this was some kind of ground motion according to Picket Fence and the 30-100mHz BLRMS, possibly a M5.1 earthquake from the Philippines, but there was no alert from Seismon or a transition to EQ mode. Unsure why we would be so sensitive to ground motion this weak.

H1 is already relocking automatically up to ENGAGE_ASC after going through PRMI.

For FC backscatter projection, I excited the FC length signal. I basically followed the LLO's FC backscatter estimation in 65120.

The excitation result is shown in the first attachment. The FC length is excited between 4 Hz and 400 Hz and the DARM excess noise is seen between 20 Hz and 200 Hz. In the plot, the FC length signal is not calibrated and the DARM is calibrated to displacement. Note that there is no coherence between the excited FC length signal and excited DARM so this is not a linear coupling.

The FC backscatter noise is estimated using the following formula.

DARM_FC_backscatter = FCL_no_exc * sqrt(DARM_exc^2 - DARM_no_exc^2)/sqrt(FCL_exc^2 - FCL_no_exc^2)

The projection is shown in the second attachment. The projected FC backscatter is below DARM by a factor of more than 40.

TITLE: 06/21 Day Shift: 1430-2330 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: RyanS
SHIFT SUMMARY:

H1 had a fairly straightforward time.  Needed an alignment to get it back to NLN both times.  Highlight of the afternoon was (3) gravitational wave candidates in less than 3hrs!
LOG:

• (1333) Lockloss & an hour of locking to no avail.
• 1435 Initial Alignment
• 1445 Reran launch script for nuc33 (for sqz dtt which was successful) and nuc5 (for dmt viewer which was not successful)
• 1503-1609 Dust Monitor FAMIS checks for EX.EY.LVEA (mitch)
• 1546-1613 Optics/Vac Prep clean (karen)
• 1550 OBSERVING (Overnight, h1 did run through an alignment at 1400, but it did not take.  So I ran one at beginning of shift and it was straightforward, DRMI was taking close to 5min, so went to PRMI, --BUT-- wouldn't ya know it, DRMI locked right after I selected PRMI! Other than that Locking was easy.
  • Forgot to note the alignment via Observatory Mode :(
  • NOTE:  Sheila made a comment about the Squeezer not looking great at beginning of lock (high frequency looked higher to her than normal during this thermalization phase); will revisit in a few hours.
• 1600 PCal work (francisco)
• 1629-2205 Continuing EX chiller work (tyler & MacMiller contractor)
• 1629-1800-ish Glycol make-up/add at every out building (tyler, eric)
• 1637 Lockloss & taken immediately to Initial Alignment (thanks, Oli! And selected ALIGNING for OBSERVATORY MODE)
  • 1752 back to OBSERVING
• 1730-1750 Fit & Over 50 Tour (kim)
• 1736 OM2 test by Sheila for an early measurement to be run on an early morning over the weekend.
• 1753 tcs laser work in optics lab (camilla)
• 1756-1832 sqz work in optics lab (karmeng)
• 1951 SuperEvent S240621dy
• 2008 Continuing sqz work in optics lab (karmeng)
• 2009 SuperEvent S240621eb
• 2012-2033 WSU-Pullman REU tour (maggie)
• 2141 SuperEvent S240621em
• 2149-2245 More tcs laser work in optics lab (camilla)
• 2307 Grabbing PCal equip (francisco)

[Andrei, Erik]

Andrei's script to create a spectrogram of these channels

H1:IOP-LSC0_MADC5_TP_CH8

H1:SQZ-FC_LSC_DOF2_OUT_DQ

Every ten minutes is now running. 

The script and its outputs are in /ligo/gitcommon/FC

Output is retained for 28 days.

The script is running on cdsvmscript1.

To turn it off, log in as root, then run

systemctl stop filter_cavity_spectrogram

systemctl disable filter_cavity_spectrogram

To turn it back on,

systemctl start filter_cavity_spectrogram

systemctl enable filter_cavity_spectrogram

TITLE: 06/21 Eve Shift: 2300-0800 UTC (1600-0100 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
OUTGOING OPERATOR: Corey
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 14mph Gusts, 9mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.05 μm/s
QUICK SUMMARY: H1 has been locked and observing for just over 5 hours.

• Wind and microseism are low
• All other systems nominal

Ryan C, M Robinson, R Kumar

Given below is the summary of work done in the triples lab in the last two months regarding assembly of A+ HRTS suspension for O5 (refer to alog 76635 which gives the details about the first assembly in March 2024- assembly s/n 02). We have assembled four new suspensions (assembly s/n 03, 08, 01, 11), which brings the total number of assembled (with BOSEMs) and characterized suspension in the lab to five. All five assembly till now has been for the FREESTANDING version (only the base differs- which is as per D1900287).

In this round of assembly and testing procedure of HRTS we have made two new improvements as listed below,

1. Class B PEEK wire install tool (top mass to PUM - as shown in the picture attached) - This new PEEK part has been designed by the RAL team after we had wire breaking issues in the first round of assembly. Using this new tool we can safely and quickly install the wires between top mass and PUM outside the cage on the optical bench.

2. Vibration Isolation set up as shown in view01 and view02 - While running transfer function measurements, the HRTS suspension was strongly coupling-in with the lab/building environment (ground vibrations, doors, HVAC etc). To partially isolate the SUS, we now have an optical bench (12in by 18in, Thorlabs Nexus Breadboard) sitting on a 1inch thick viton pads (placed at the four corners of the bench). Also, Chris fabricated a hard top transparent cover for us to protect against the turbulent air flow in the lab.

Cage S/N 03 (April 2024)

Suspended masses (as per specifications):-

Top Mass = 749gm, Penultimate mass = 803gm, Dummy optic = 300gm

Transfer function measurements for HRTS assembly S/N 03 is attached here.

Cage S/N 08 (April 2024)

Suspended masses (as per specifications):-

Top Mass = 755gm, Penultimate mass = 803gm, Dummy optic = 301gm

Transfer function measurements for HRTS assembly S/N 08 is attached here.

Cage S/N 01 (May 2024)

Suspended masses (as per specifications):-

Top Mass = 752gm, Penultimate mass = 804gm, Dummy optic = 300gm

Transfer function measurements for HRTS assembly S/N 01 is attached here.

Cage S/N 11 (May 2024)

Suspended masses (as per specifications):-

Top Mass = 750gm, Penultimate mass = 803gm, Dummy optic = 301gm

Transfer function measurements for HRTS assembly S/N 11 is currently under processing and the latest plots will be attached soon.

Conclusions: - The transfer function measurements ties-up nicely to the model, however we do see some low frequency coupling and unwanted peaks. The cross coupling and unwanted peaks are due to environmental noise which is difficult to fully isolate in the lab.

I will also post a plot comparing the transfer function measurement results for all five suspension that we have tested.

I've set up a script to start heating up om2 TSAMS at 5:30 on Monday morning, so that it will be thermalized in time for our 8:30 pacific commissoning time. 

The script is at /ligo/gitcommon/labutils/beam_spot_raster/om2_stepper.py

It is running on cdsws39:

sheila.dwyer@cdsws39:/ligo/gitcommon/labutils/beam_spot_raster$ tconvert 1403267418 -l
Jun 24 2024 05:30:00 PDT
sheila.dwyer@cdsws39:/ligo/gitcommon/labutils/beam_spot_raster$ python om2_stepper.py -s 1403267418
Waiting for start time...

Had an SDF Diff for "ETMX_L3_DRIVEALIGN_L2L_GAIN"  (now 187.3792660000, was 187.3792260000); looks like this change is from work yesterday (alog 78555, and also screenshot).  ACCEPTED new gain.

WP11914, WP11918 Install ADC in h1iscex for h1pemex readout

Fil, Marc, Erik, Jonathan, Dave

In preparation for testing the new LIGO DAC card in h1susex, an ADC was installed in h1iscex which will read the new DAC's signals.

This ADC belongs to PEM, it was purchased to expand the number of accelerometers.

The ADC, its ribbon cable and interface card were installed in the h1iscex IO Chassis (see drawing). A PEM AA-Chassis was installed and connected to the ADC.

Two models were changed:

h1iopiscex: add 5th ADC

h1pemmx: readout the 5th ADC, route all 32 channels into filter modules with the names H1:PEM-EX_ADC_4_CHAN_n where n=0-31

DAQ restart was needed.

Add WAP channels to DAQ

Erik, Dave:

We took the DAQ restart as an opportunity to use the latest H1EPICS_WAP.ini which adds the missing corner station WAPs. EDC and DAQ restart needed.

Add IRIG-B signals back to end station CAL models

Keita, Fil:

The CNS-II Clock GPS receivers independent IRIG-B signals were reattached to the h1isc[ex,ey] AA chassis.

DAQ Restart

Dave, Jonathan:

The DAQ was restarted for the above model and EDC changes. There were several issues:

gds0 needed a second restart

FW1 spontaneously restarted itself after 728 seconds.