Camilla, Jenne. Started in 73345. H1 had been locked ~5 hours.

Didn't exactly follow instructions in lsc/h1/scripts/feedforward/README.md, as took residual measurements with no FF and took FF measurements with actuation through ETMY PUM rather than ETMX. 

• IFO taken to NLN_CAL_MEAS, turned MICH and SRCL FFs off (gains to zero), took MICH_excitation.xml and SRCL_excitation.xml measurements.
• Swapped FF actuation from ETMX to ETMY PUM with attached script (Jenne pasted line-by-line into interactive 'guardian'), ramp MICHFF /SRCLFF gain to 0, turn off all FF's but keep highpasses on, turn off INPUT, ramp gain back to 1, took MICHFF_excitation_ETMYpum.xml and SRCLFF_excitation_ETMYpum.xml measurements.
• Exported all data to .txt files.
• Didn't correctly undo the ETMY to ETMX FF actuation swap and caused a lockloss.

Lock loss was a control room user caused loss. Relocking now but we are also in the middle of a smaller earthquake.

Tony followed the instructions on the wiki and ran a broadband and then simulines measurement. I'm getting the start time from when the PCAL signal started, end time is from the script.

Start: 1381086932

End: PDT: 2023-10-11 13:48:41.623282

UTC: 2023-10-11 20:48:41.623282

GPS: 1381092539.623282

2023-10-11 20:48:41,458 | INFO | File written out to: /ligo/groups/cal/H1/measurements/DARMOLG_SS/DARMOLG_SS_20231011T202627Z.hdf5

2023-10-11 20:48:41,480 | INFO | File written out to: /ligo/groups/cal/H1/measurements/PCALY2DARM_SS/PCALY2DARM_SS_20231011T202627Z.hdf5

2023-10-11 20:48:41,496 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L1_SS/SUSETMX_L1_SS_20231011T202627Z.hdf5

2023-10-11 20:48:41,509 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L2_SS/SUSETMX_L2_SS_20231011T202627Z.hdf5

2023-10-11 20:48:41,523 | INFO | File written out to: /ligo/groups/cal/H1/measurements/SUSETMX_L3_SS/SUSETMX_L3_SS_20231011T202627Z.hdf5

Naoki, Vicky

Today we found that ZM6 output is close to saturation. We looked at ZM6 output and found three jumps in ZM6 output yesterday as shown in the attached figure. The first and third jumps are from the Set ZM HD and Set ZM IFO for homodyne work yesterday. The second huge jump (~10000) appeared in ZM5/6 and this would be the cause of the ZM6 saturation. This huge jump happened when the SQZ_MANAGER guardian moved from LOCK_CLF(30) to SQZ_READY_HD(40) at 12:30 PDT yesterday and this would be the cause of the strange seed alignment jump happened during homodyne work yesterday as reported in alog73365. We looked at SQZ_READY_HD state in SQZ_MANAGER guardian and found that there is a reset of SQZ ASC offset in the state. We commented out this offset reset. We need to offload ZM6 again as alog73171.

As suggested by Elenna/Jenne, ran the /lsc/h1/templates/PRCL/PRCL/PRCL_OLG_NOISE_FULL_LOCK_NLN.xml PRCL open loop gain measurement.

While we're commissioning this afternoon, I've got NonSENS cleaning engaged.  I've also temporarily accepted the SDF diff that turns on the cleaning, so that we can see the range of the _CLEAN channel in real time (this is why our range is high on our control room screenshots right now). 

The NonSENS cleaning was on starting a few tens of seconds before 20:00:00 UTC today, and I intend to leave it as-is for at least an hour.  Robert is doing work at this time, but it's quite minimally invasive, so this time should still be useful for PE verification software injections that are a part of the review of the cleaning.

Wed Oct 11 10:11:20 2023 Fill completed in 11min 16secs

Jordan confirmed a good fill curbside.
 

Tyler "has recently changed the chiller pumps to not be on at all times and come on when needed. He gave me some data for when the EX chiller has been turning on and off over the last 2.5 weeks" (TJ, 2023). I took this data and plotted it against our range as well as the average internal temperature at EX to see if we would lose range when the chiller at EX turned on(attachment1).

Over this date range, the longest amount of time that the chiller was on consistently was for just over two hours. With both these longer segments and the more regular shorter segments of 'on' time (sometimes just 10 minutes on), there is no noticeable change in the range when the chiller turns on or off. There are multiple times where the range trends downward after the chiller starts turning on for longer stretches of time (red attachment2), but it is not consistent - yellow(attachment3) and green(attachment4) rectangles show the range rising with chiller 'on' times. Therefore I am inclined to attribute the lowering of the range during these times as being due to changes in indoor/outdoor temperatures and wind and not the chiller.

TITLE: 10/11 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 147Mpc
OUTGOING OPERATOR: Ibrahim
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 16mph Gusts, 13mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.62 μm/s
QUICK SUMMARY:

Locked for 5 hours when I arrived.
Everything Seemed to look great,
15:02 UTC a seemingly random lockloss occured.
Richard informed me that the Dust monitors in the PSL were alarming again , likely due to the elevated wind speeds.
 

TITLE: 10/11 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
INCOMING OPERATOR: Ibrahim
SHIFT SUMMARY:

• 00:55 - Incoming earthquake from Afghanistan
  • 00:59 - EQ mode activated
  • 01:43 - SRM saturations as ground motion picks up
  • 01:43 - Lockloss: alog
  • Waiting for ground motion to calm before relocking
  • 02:42 - Seismic to calm
• 02:49 - Starting lock acquisition
• 04:04 - Reached NLN, fully automated acquisition
• 04:14 - Started observing

LOG:

No log for this shift.

During maintenance today I adjusted weights on the PSL periscope to try to reduce the DARM peak in the 120 Hz region. I reduced the highest part of the peak where the HVAC-produced seismic peak overlaps with a periscope peak,  by about 3/5.  Also, with the consent of Tyler, I shut off SF2, which is mainly responsible for the new HVAC peak, reducing the total LVEA flow from 31k CFM to about 27k CFM. Before the pandemic we ran with two fans pushing about 10k CFM each for a total of about 20k CFM, so I dont think it will be too much of an issue. I have been monitoring LVEA temperature and it looks like the excursions are getting smaller.

The improvement at 120 Hz is looking pretty good, more details later.

Lockloss @ 01:43 UTC from several earthquakes in Afghanistan (M6.3 followed by aftershocks of M5.0 and M4.1). Earthquake mode first activated at 00:59 UTC when the initial S-wave hit.

Holding H1 in DOWN until ground motion calms down.

TITLE: 10/10 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
OUTGOING OPERATOR: Tony
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 14mph Gusts, 12mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.31 μm/s
QUICK SUMMARY: H1 has been locked and observing for 2 hours.

• All systems look good; wind is slightly elevated

TITLE: 10/10 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
INCOMING OPERATOR: Ryan S
SHIFT SUMMARY:
Tuesday maintenance day recovery went well.
There was a H1:PSL-ENV_LASERRM_ASC_TEMP_DEGF  Channel That isstill getting back to nominal temps in the PSL
The PSL Dust mon has been going off since the wind has started to pick up.
H1 has been locked for 2 Hours and 12 Minutes.
LOG:
                                                                                                                

Vicky, Sheila, Camilla, Dorotea, Naoki

We went to SQZT7 this morning with the new homodyne (73241).  In the end we wer able to see decently flat shot noise and decent visibility.  On the way, we ran into some difficulties that caused some confusion:

• There was a cable from the homodyne very close to the seed beam path.
• The beam on homodyne PDA (LO transmitted through BS). 
• There is some seed leakage from the OPO path, even when that path is blocked by the flipper.  This means that the shot noise is very noisy unless the flipper is blocked and the seed is also blocked on SQZT0.
• We were able to improve the visibility by moving the alignment of the lenses.  This gave us better visibilty than we found just by adjusting the alignment of the steering mirrors.
• The half wave plate on the seed path is still in place, it is set to make the polarization vertical (checked with a PBS) which also results in a close to balanced power ratio on the two paths.
• After we were satisfied with our flat shot noise and visibility aroun 98% on each arm of the homodyne, we went to the control room.  Then there was an alignment shift mostly in pitch that badly misaligned the seed beam from the homodyne.  The ZM sliders and PSAMs values hadn't changed.

In the end we have flat shot noise, and a visibility of 98.5% measured on PDA (3.07% loss) and visibility of 97.8% (4.44% loss) measured on PDB.  The nonlinear gain of 11 measured with seed max/ no pump. A comment to this alog will contain the measured sqz/asqz/mean sqz.