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Reports until 15:57, Monday 08 April 2024
H1 General
ryan.crouch@LIGO.ORG - posted 15:57, Monday 08 April 2024 - last comment - 16:06, Monday 08 April 2024(77027)
OPS Monday eve shift start

TITLE: 04/08 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Commissioning
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 12mph Gusts, 10mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.20 μm/s
QUICK SUMMARY:

Comments related to this report
ryan.crouch@LIGO.ORG - 16:06, Monday 08 April 2024 (77028)
Link

Into Observing at 23:06UTC

H1 SQZ
camilla.compton@LIGO.ORG - posted 12:49, Monday 08 April 2024 - last comment - 18:35, Monday 08 April 2024(77023)
SQZ and SRCL tuning Measurements

Eric, Sheila, Jennie, Naoki, Camilla

Aiming to repeat 68814 O4a FIS SQZ, SCRL offset data set. Nominal H1:LSC-SRCL1_OFFSET = -175, previously looked at in 74373.

Measured NLG =16.86  (following 76542). Adjusted OPO temperature 31.481 to 31.470.
PZT1 is locked around 70V, which isn't our favorite place, we're seen SQZ is better when it locks at nearer 100V.

Using data from our PSAMS scan 76986, we're set ZM4 to 8.8V (175 offset), leaving ZM5 with -0/7V (100 offset). Reran alignment scripts following 76986. Accepted PSAMs sdf, and alignment sliders.

For FIS took SQZ_MANGER to AUTO to stop ISC_LOCK bringing it to FDS.

PSAMs at 8.8/-0.7

  • 15:23:30 - 15:42:00UTC  No SQZ time
  • 16:04:45 - 16:10:00UTC FDS SQZ
  • 16:13:00 - 16:21:30UTC FIS SRCL1_OFFSET -175, SCAN_SQZANG tuned to 350Hz: 193deg CLF Phase
  • 16:30:20 - 16:36:00UTC FIS SRCL1_OFFSET -225,  hand tuned SQZ angle to 2kHz: 208deg CLF Phase
  • 16:39:00 - 16:45:00UTC FIS SRCL1_OFFSET -275,  hand tuned SQZ angle to 2kHz: 212deg CLF Phase
  • 16:49:00 - 16:54:30UTC FIS SRCL1_OFFSET -325,  hand tuned SQZ angle to 2kHz: 217deg CLF Phase
  • 16:57:30 - 17:04:00UTC FIS SRCL1_OFFSET -375,  hand tuned SQZ angle to 2kHz: 223deg CLF Phase
  • 17:07:00 - 17:12:30UTC FIS SRCL1_OFFSET -425,  hand tuned SQZ angle to 2kHz: 228deg CLF Phase
  • 17:13:10 - 17:18:30UTC  No SQZ time (to check for SRCL offset causing technical noise but DARM looks the same as previous)
  • 17:25:30 - 17:31:30UTC FIS SRCL1_OFFSET -175, hand tuned SQZ angle to 2kHz: 192deg CLF Phase
  • 17:35:00 - 17:41:00UTC FIS SRCL1_OFFSET -125, hand tuned SQZ angle to 2kHz: 186deg CLF Phase
  • 17:43:00 - 17:48:30UTC FIS SRCL1_OFFSET -75, hand tuned SQZ angle to 2kHz: 168deg CLF Phase

Data with different angles (+/-10deg from SQZ and ASQZ, and +/- midsqz aimed to match no SQZ level) with SRCL1_OFFSET -175. Plot attached.

  • 17:59:30 - 18:04:30UTC FIS SRCL1_OFFSET -175, 192deg CLF Phase
  • 18:05:30 - 18:10:30UTC FIS SRCL1_OFFSET -175, 182deg CLF Phase
  • 18:11:20 - 18:16:30UTC FIS SRCL1_OFFSET -175, 202deg CLF Phase
  • 18:18:30 - 18:23:30UTC FIAS SRCL1_OFFSET -175, (neg sign) 108deg CLF Phase
  • 18:24:35 - 18:29:40UTC FIAS SRCL1_OFFSET -175, (neg sign) 98deg CLF Phase
  • 18:30:00 - 18:35:00UTC FIAS SRCL1_OFFSET -175, (neg sign) 118deg CLF Phase
  • 18:41:00 - 18:46:00UTC FIMS SRCL1_OFFSET -175, 140deg CLF Phase (-Mid SQZ aimed to match no SQZ level)
  • 18:55:00 - 19:00:00UTC FIMS SRCL1_OFFSET -175, 220deg CLF Phase (+Mid SQZ aimed to match no SQZ level)

Data with different angles (+/-10deg from SQZ and ASQZ) with SRCL1_OFFSET -275.

  • 19:10:30 - 19:15:30UTC FIS SRCL1_OFFSET -275, 207deg CLF Phase
  • 19:16:00 - 19:21:00UTC FIS SRCL1_OFFSET -275, 197deg CLF Phase
  • 19:21:30 - 19:24:00 [glitch] 19:24:35 - 19:27:40UTC FIS SRCL1_OFFSET -275, 217deg CLF Phase
  • Lockloss before completing data set
Images attached to this report
Comments related to this report
eric.oelker@LIGO.ORG - 13:53, Monday 08 April 2024 (77026)
Link

Additional plots for data above:

  • SRCL_TUNE_FIS_2.png:  This shows how FIS changes as a function of SRCL detuning (-175 is our current nominal value).  We see that when increasing the SRCL detuning, we initially see significant improvement at lower frequencies with a slight rise in midband.
  • SRCL_TUNE_FIS_3.png:  This shows how FIS changes as we change the SRCL detuning in the other direction.  Everythihng appears to get worse.

Note:  As a sanity check, we took another NoSQZ trace at H1:LSC-SRCL1_OFFSET = -= -425 and saw that it looked idential to NoSQZ at H1:LSC-SRCL1_OFFSET = -175. 

After looking at this scan, we were wondering if H1:LSC-SRCL1_OFFSET = -275 might be a more optimal operating point than H1:LSC-SRCL1_OFFSET = -175.  We decided to do a few more FIS measurements at the two candidate operating points:

  • FIS_SRCL_neg175.png (Attached above in Camilla's post): shows FIS, FIAS and FIMid Squeezing and nearby squeezing angles for a H1:LSC-SRCL1_OFFSET = -175
  • VARY_SQZANG_SRCL_275 shows FIS and +/- 10 degrees for H1:LSC-SRCL1_OFFSET = -275.  Unfortunately we lost lock before taking the remaining points.

After rethermalizing, we plan to look at FDS at H1:LSC-SRCL1_OFFSET = -275 and perhaps tweak the filter cavity a bit to see if this SRCL detuning is better or worse in terms of range. 

Images attached to this comment
eric.oelker@LIGO.ORG - 18:35, Monday 08 April 2024 (77035)
Link

An alternate version of one of the plot from the original post. A few intetrmediate traces are removed and replaced w reference FDS and No SQZ traces.  

Images attached to this comment
H1 ISC (ISC)
jennifer.wright@LIGO.ORG - posted 11:59, Monday 08 April 2024 (77025)
Optimising Build-ups with CAM PIT OFFSET

Sheila, Jennie W

 

Sheila and I changed H1:ASC-CAM_PIT1_OFFSET down and went through a point which increased the build-ups in the arms.

She has added this camera offset to guardian.

CAM1 is the servo which moves the PRM to keep the spot constant on the beamsplitter.

See Sheila's pic showing where the best offset is.

We are planning to optimise the A2L gains for each ITM and ETM after this.

Images attached to this report
LHO VE
david.barker@LIGO.ORG - posted 10:22, Monday 08 April 2024 (77024)
Mon CP1 Fill

Mon Apr 08 10:08:37 2024 INFO: Fill completed in 8min 34secs

Jordan confirmed a good fill curbside.

Images attached to this report
H1 PSL
ryan.short@LIGO.ORG - posted 08:29, Monday 08 April 2024 (77021)
PSL 10-Day Trends

FAMIS 20023

The PSL was taken down 6 days ago for a Beckhoff update (alog76879), which is seen on several trends.

After that, the PMC seems to have locked with lower transmission by almost 1W.

Images attached to this report
LHO General
ryan.short@LIGO.ORG - posted 08:01, Monday 08 April 2024 (77020)
Ops Day Shift Start

TITLE: 04/08 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 4mph Gusts, 2mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.20 μm/s
QUICK SUMMARY: H1 has been locked and observing for 20 hours (since 19:02 UTC yesterday).

H1 General
ryan.crouch@LIGO.ORG - posted 00:00, Monday 08 April 2024 (77018)
OPS Sunday EVE shift summary

TITLE: 04/08 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 154Mpc
INCOMING OPERATOR: Oli
SHIFT SUMMARY: We stayed locked the whole shift, about 11 hours as off 07:00UTC. In observing since 19:02UTC

ISC_LOCK has flashed "ISS DIFF power is low a few times"

I've seen the MC1/3 camera flash blue a few times

The lock clock on NUC28 is incorrect

LOG:

No log

H1 General
ryan.crouch@LIGO.ORG - posted 20:01, Sunday 07 April 2024 (77017)
OPS Thursday EVE update

STATE of H1: Observing at 153Mpc
We've been locked for ~7 hours

H1 General
ryan.crouch@LIGO.ORG - posted 16:03, Sunday 07 April 2024 (77016)
OPS Sunday EVE shift start

TITLE: 04/07 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 154Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 9mph Gusts, 6mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.17 μm/s
QUICK SUMMARY:

LHO General
ryan.short@LIGO.ORG - posted 16:01, Sunday 07 April 2024 - last comment - 20:10, Sunday 07 April 2024(77015)
Ops Day Shift Summary

TITLE: 04/07 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 153Mpc
INCOMING OPERATOR: Ryan C
SHIFT SUMMARY: Mostly quiet day with just one lockloss and a fully automated relock. The network has been down all day and came back at 22:48 UTC.

LOG:

No log for this shift.

Comments related to this report
david.barker@LIGO.ORG - 20:10, Sunday 07 April 2024 (77019)
Link

I restarted the lock_loss_alerting system at 19:59, it had not been running correctly following the network outage.

H1 General (Lockloss)
ryan.short@LIGO.ORG - posted 11:14, Sunday 07 April 2024 - last comment - 12:02, Sunday 07 April 2024(77013)
Lockloss @ 17:52 UTC

Lockloss @ 17:52 UTC - no obvious cause. There was a small spike in the EQ band at EX around that time, but I don't expect something that small would cause a lockloss.

Comments related to this report
ryan.short@LIGO.ORG - 12:02, Sunday 07 April 2024 (77014)
Link

H1 back to observing at 19:02 UTC.

LHO VE
david.barker@LIGO.ORG - posted 10:23, Sunday 07 April 2024 (77012)
Sun CP1 Fill

Sun Apr 07 10:08:32 2024 Fill completed in 8min 29secs

Dave confirmed a good fill curbside.

Images attached to this report
LHO General
ryan.short@LIGO.ORG - posted 10:18, Sunday 07 April 2024 (77011)
Ops Day Shift Start

TITLE: 04/07 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 158Mpc
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 5mph Gusts, 3mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.15 μm/s
QUICK SUMMARY:

Late entry while alog was down. All systems nominal.

H1 CDS
david.barker@LIGO.ORG - posted 10:14, Sunday 07 April 2024 (77010)
Test alog while offsite network is down

A test alog to verify local backup authentication is working

H1 PEM (DetChar, PEM)
shivaraj.kandhasamy@LIGO.ORG - posted 05:12, Sunday 07 April 2024 (77009)
A couple of disconnected(?) accelerometer channels

The spectra of CS_ACC_LVEAFLOOR_YCRYO_Z, CS_ACC_HAM3_PR2_Y are much lower than the other accelerometer channles.

(i) The channel CS_ACC_LVEAFLOOR_YCRYO_Z has been like that since March 12. 

(ii) The channel CS_ACC_HAM3_PR2_Y has been like that since Jan 30. 

It seems they are either disconnected or having a lose connection. 

H1 General
oli.patane@LIGO.ORG - posted 00:02, Sunday 07 April 2024 (77008)
Ops EVE Shift End

TITLE: 04/07 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 157Mpc
INCOMING OPERATOR: TJ
SHIFT SUMMARY: Currently Observing and have been Locked for 3 hours. Lockloss earlier in the evening needed me to adjust ALSY and move the beamsplitter for MICH/PRMI/DRMI but we went up quickly after that.
LOG:

23:00UTC Detector Observing and Locked for 7.5 hours

02:47 Lockloss
    - ALSY had really high flashes but was struggling to catch until I bumped the flashes up by ~0.02.
    - We ended up going through CHECK_MICH_FRINGES but I was able to get us aligned enough to go through DRMI without needing to do an initial alignment - we'll definitely need to run an initial alignment next time
03:54 NOMINAL_LOW_NOISE
03:56 Observing

H1 General (Lockloss)
oli.patane@LIGO.ORG - posted 19:48, Saturday 06 April 2024 (77007)
Lockloss

Lockloss 04/07 02:47UTC from unknown cause

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