TITLE: 11/13 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Aligning
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 16mph Gusts, 11mph 3min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.65 μm/s
QUICK SUMMARY: Looks like H1 made it up to low noise two times in the last 3 hours, but lost lock immediately. useism is still quite high, and some wind overnight didn't help. The IMC is now struggling to stay locked after a few failed DRMI attempts, but a successful PRMI. Starting initial alignment now.

TITLE: 11/13 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
INCOMING OPERATOR: Oli
SHIFT SUMMARY:

Slow start to locking at the beginning of the shift, but once PSL work was done, ran an alignment and returned to locking (had one lockloss due to PSL/IMC), then made it to NLN/Observing and had a "normal lockloss" (i.e. NOT PSL/IMC).

Probably old news, but it feels like after locklosses DRMI/PRMI have been pretty misaligned.  Sometimes fixed by CHECK MICH FRINGES/PRMI, but sometimes a full INITIAL ALIGNMENT is required.  (Running 2nd Initial Alignnment of the shift before the end of the shift.)

Microseism is still high but winds calmed during this shift.
LOG:

• 0055 Eric back from CER
• 0103 SEI_ENV to USEISM (from MAINTENANCE)
• 0111-0139 Initial Alignment
• Locking Notes
  • µseism is still above the 95th percentile (but has been drifting down since 1800utc)
  • Winds finally dropped to 10mph at 0130utc
  • Lock#1 LOCKLOSS at TRANSITION_FROM_ETMX (557)
    • Did not get to see if H1 could ride through Elenna's time ramp lowering for LOWNOISE ESD ETMX (558) from alog81224.
    • Vicky looked at the lockloss and said she saw one of the IMC glitches (and also got the lockloss IMC tag)
• 0455-0510 LVEA Sweep (elenna, corey)
• 0525-0544 INITIAL ALIGNMENT RUN
• H1 is currently moving past DRMI but at 0555 had a LOCKLOSS during OFFLOAD DRMI.

E.Capote, C.Gray

With the recent lockloss, Elenna and I went out to do the LVEA Sweep, which also included unplugging the Freq Noise Injection cable they plugged in yesterday.

Long Maintenance/Preventative-Maintenance Day Today

Once Jason & RyanS finished their PSL work on the floor (and some observing of the IMC for glitches in the Control Room), went for locking at about 515pm PST---with an INITIAL ALIGNMENT which completed with no major hitches.  For locking, we continue to get Locklosses before/at LOCKING ARMS GREEN (so held at READY for a bit....but we had to wait a few minutes for the IMC to lock).  Once we got past this, went for our first lock of the night. 

[µseism is still very high, but winds dropped from 30mph down to 10mph]

Lock #1:  LOCKLOSS for H1 at TRANSITION FROM ETMX[557] (which is noteworthy because Elenna was wanting to see if the lowered T-Ramp (alog81224) at LOWNOISE ESD ETMX [558] and we didn't get to see this.  Vicky looked at this lockloss and sadly this LOCKLOSS was one of our infamous PSL/IMC Glitches.

Lock #2:  After the lockloss above, DRMI looked pretty bad, so I took it to PRMI (but it also needed CHECK MICH FRINGES).  After that, H1 went all the way to NLN automatically.  The Violins were high (~500Hz peak was at around 1e-15), so we had to stay at OMC WHITENING for 20min before going to NLN.  Then there were a list of SDFs which were all ACCEPTED (see below and attached).  H1 to OBSERVING at 0340utc with a range hovering just under 160Mpc.

Maintenance Day Notes:

• No Sweep of LVEA was made---so this should be done at next opportunity
• Cable left plugged in from Monday (see alog 81194)---(probably would have been caught if Sweep was done)
• Wifi turned off for LVEA & MY a few minutes after going to OBSERVING.

SDF Diffs That Were ACCEPTED: (see attached)

• SUS:  ETMy, ETMx, & ITMx all had a T-Ramp reduced from 10.0 to 2.0 seconds (alog 81224)
• PSL FSS:  Common Gain increased from 13 to 15.  Fast Gain increased from 5 to 6.
• PSL PMC:  PWR_HPL_DC_GAIN increased from 0.0160515000 to 0.0477320000

At 19:27:26 PST a PT132_MOD2 glitch caused a single-sensor VACSTAT glitch. The new code requires two chambers to glitch before alarming the VAC team, so in this case no cell phone alarms were sent.

The glitch lasted 4 seconds, and as before it was DeltaP which tripped, exceeded its trip level of 1.0e-08Torr  (see attached).

I restarted vacstat_ioc.service on cdsioc0 to reset the system.

TITLE: 11/13 Eve Shift: 0030-0600 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
OUTGOING OPERATOR: TJ
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 26mph Gusts, 19mph 3min avg
    Primary useism: 0.67 μm/s
    Secondary useism: 0.77 μm/s
QUICK SUMMARY:

Long Maintenance Day, high microseism, high winds, M5.0 Mexico earthquake.....but the IMC was just locked in the last few minutes!

TITLE: 11/13 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
INCOMING OPERATOR: Corey
SHIFT SUMMARY:
H1 was held in IDLE all day while we had a long maintenance day with a focus on the PSL's TTFSS repair.

The PSL Crew is still in the PSL room, re-installing the TTFSS.
Secondary microseism is still elevated wind is still elevated as well.  

Beckhoff updates were done today at 4PM as well.


LOG:

Famis 26336

Just over 6 days ago there was an increase in H0:VAC-EX_FAN1_570_2_ACC_INCHSEC
Both H0:VAC-MR_FAN1_170_1 & 2 ACC_INCHSEC saw an increase in noise in the last 3 days.
 

TITLE: 11/12 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
CURRENT ENVIRONMENT:
    SEI_ENV state: MAINTENANCE
    Wind: 33mph Gusts, 26mph 3min avg
    Primary useism: 0.08 μm/s
    Secondary useism: 0.85 μm/s
QUICK SUMMARY:

17:11 UTC Test T524646 EXTTRIG: SNEWS alert actve

Maintenance agenda:

• 8h30 PSL - [Enclosure] Incursion for inspection. Also note locations if new compoenents from NPRO swap (see WP 12155) (Jason, Ryan) WP12187
  PSL folks came out of the PSL and said we should be watching for glitches on these channels:
  H1:PSL-PWR_HPL_DC_OUT_DQ and H1:PSL-PMC_MIXER_OUT_DQ
  Mark is characterizing the TTFSS (Table Top Freqency Stableization Servo) box, then the PSL team will go back into the PSL, plug it in and we may get an IFO back.
  The expectation is we should have an Iby the Eve Shift.
   
• PSL Meassurement and adjustemnet (Keita)
• CDS - [VACSTAT]  Add new STATE and VERSION VACSTAT channels to DAQ. EDC+DAQ restart. (Dave) WP12185
• FAC - DGR contractor working land behind staging building MON, TUES, WED noisy ground movement. (T. Guidry R. McCarthy) WP12120
• VAC - [EY/ MX] Inspection and unpacking of new end station purge air compressor components. (Travis) WP12191

The VEAs in Mid X and Mid Y have four temperature sensors located inside the exterior wall. These four sensors are averaged by the automation system for the purpose of temperature control. The location in the exterior wall means all four of these sensors are influenced by outdoor ambient air and consistently read higher or lower than the interior of the VEA, depending on the season. At both mid stations, one of these sensors will be relocated to the interior of the room. Then, two of the sensors in the exterior wall will be taken out of the averaging so that one interior sensor and one wall sensor will be used to figure the average space temperature. This will have an impact on temperature trends for the mid stations, and although these are not critical like the temperatures at the corner and end stations, anyone keeping an eye on the trends will notice a significant change. 

Image 1: PSL top eurocrate
From left to right: ISS inner loop, old ISS second loop (depowered), reference cavity heater (depowered), and TTFSS field box.

Image 2: PSL bottom eurocrate
From left to right: injection locking field box (depowered), injection locking servo (depowered), monitor field box, PMC locking field box, and PMC locking servo.

Tue Nov 12 10:07:17 2024 INFO: Fill completed in 7min 13secs

Jordan confirmed a good fill curbside.

TITLE: 11/12 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: USEISM
    Wind: 18mph Gusts, 14mph 3min avg
    Primary useism: 0.06 μm/s
    Secondary useism: 0.78 μm/s
QUICK SUMMARY:

Good Maintenance Tuesday Morning Everyone.
H1 was in move spots when I walked in and shortly there after caught a lockloss.
So In_Lock_SUS_Charge Measurements will not be ran this week.
List of expected Maintenance Items :

• 8h30 PSL - [Enclosure] Incursion for inspection. Also note locations if new compoenents from NPRO swap (see WP 12155) (Jason, Ryan) WP12187
• PSL Meassurement and adjustemnet (Keita)
• CDS - [VACSTAT]  Add new STATE and VERSION VACSTAT channels to DAQ. EDC+DAQ restart. (Dave) WP12185
• FAC - DGR contractor working land behind staging building MON, TUES, WED noisy ground movement. (T. Guidry R. McCarthy) WP12120
• VAC - [EY/ MX] Inspection and unpacking of new end station purge air compressor components. (Travis) WP12191

We seem to be having lots of locklosses during the transition from ETMX/lownoise ESD ETMX guardian states. With Camilla's help, I looked through the lockloss tool to see if these are related to the IMC locklosses or not. "TRANSITION_FROM_ETMX" and "LOWNOISE_ESD_ETMX" are states 557 and 558 respectively.

For reference, transition from ETMX is the state where DARM control is shifted to IX and EY, and the ETMX bias voltage is ramped to our desired value. Then control is handed back over the EX. Then, in lownoise ESD, some low pass is engaged and the feedback to IX and EY is disengaged.

In total since the start of O4b (April 10), there have been 26 locklosses from "transition from ETMX"

• 14 of which have been since the vent recovery on Aug 21
• 5 of these locklosses are tagged "IMC", all occuring on or after October 4.
• The first lockloss in this state since the vent recovery occured on Sept 13
• There is a variety of state duration times in these locklosses, ranging from 4 seconds to 2 minutes 57 seconds
• most of these locklosses before and after the vent have additional tags, such as "windy", "earthquake" etc. Only three appear to have only "refined" as a tag

From the start of O4b (April 10) to now, there have been 22 locklosses from "lownoise ESD ETMX"

• 5 of these occured before the vent
• none are tagged as IMC
• All but two of the locklosses occured with state durations between 1-3 seconds in the state
• before the vent, the 5 locklosses have additional tags besides "refined", such as "OMC DCPD", or "WINDY". After the vent, most of the locklosses are only tagged as "refined".
• Since the vent, one of these locklosses occured on Aug 23, the rest have occurred on or after Sept 27

Trending the microseismic channels, the microseism increases seems to correspond with the worsening of this lockloss rate for lownoise ESD ETMX. I think, when correcting for the IMC locklosses, the transition from ETMX lockloss rate is about the same. However, the lownoise ESD ETMX lockloss rate has increased significantly.

Sheila and I went out to the floor to plug in the cable to run frequency noise injections (AO2).

I switched us to REFL B (79037) only to run the injections. I first ran the frequency noise injection template. Then, I disenaged the 10 Hz pole and engaged the digital gain to run the ISS injections (low, medium, and high frequency). I was fiddling with the IMC WFS pitch injection template to get it to higher frequency for a jitter injection when we lost lock.

Next step is to at least use the intensity and frequency measurements to determine how the noises are coupling to DARM (would be nice to have jitter too, but we'll see).