TITLE: 04/29 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: Ryan C
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 7mph Gusts, 5mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.15 μm/s
QUICK SUMMARY:
H1 locked for 6 + hours and Observing.
Robert has removed his cable going across the road and the road cones.
SuperEvent candidate 240429an
And the Wind has died down over the last 4 hours.

After an Initial Alignment,H1 got back to Nominal_Low_Noise at 00:47 UTC .
Waited for the ADS Cameras, and realized that there are 2 new SDFs that needed accepting.
This must have been an automated change. Mr. Short also said that he had to Accept these Diffs.

H1 Is now in Observing.

On Friday I shut down the main HVAC (15:48 Apr 26 UTC  - 16:08) to evaluate coupling. The range was under 160 Mpc, so this will have to be redone after we regain range, in order to fully evaluate the effect of the improvements made over the break. The range did increase by a couple of Mpc, but Figure 1 shows this was due to jitter coupling in the 100-200 region, not input arm scattering at lower frequencies.

Figure 1 also shows that there are other drivers of jitter coupling below 100 Hz and above 200 Hz. I used a mobile accelerometer to search for the source of jitter in the 25-40 Hz band, and found that the dominant source was the Warehouse HVAC (see Figure 2). I think that the HVAC may be shorted to the building.

TITLE: 04/28 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 28mph Gusts, 15mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.18 μm/s
QUICK SUMMARY:
Lockloss a 22:58 UTC with unkown cause right after SuperEvent S240428DR and during the Stand Down Time.
Screen Shots of the Lockloss tools NDSCOPEs attached.

---Relocking---
Started relocking immediately without an Initial Alignment.
Increase flashes ran on both arms.
Lockloss at ENGAGE_DRMI_ASC
Will try again with out IA, and if that fails then I will do an IA.

Also Robert Still has Cones up on the road along Y arm to protect his cable that he has run across the street. Please be aware of this cable and try not to drive down the Y arm with out addressing this cable going across the street.

 

TITLE: 04/28 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Tony
SHIFT SUMMARY: Two locklosses this shift (one as I type this), observing for the rest of the time. Since relocking this afternoon, DARM in high frequency didn't look as good and range was slightly lower.

• 16:50 - Lockloss (alog77471)
• 17:20 - Restarting Picket Fence (alog77473)
• 18:14 - Reached NLN, automated relock
• 18:22 - Started observing
• 22:54 - S240428dr
• 15:58 - Lockloss

LOG:

Another picket fence issue at 03:37 UTC, I think the third in the past few weeks. I restarted the process on nuc5.

Sun Apr 28 10:09:35 2024 INFO: Fill completed in 9min 31secs

Lockloss @ 16:50 UTC - link to online lockloss tool

Looks like ETMX had a glitch/saturation immediately before the lockloss (also seen by LSC-DARM), but otherwise I don't see an obvious cause.

TITLE: 04/28 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 143Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 8mph Gusts, 5mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.15 μm/s
QUICK SUMMARY: One lockloss early this morning at 12:01; H1 was able to relock on its own. Now locked and observing for almost 2 hours. Planning for coordinated calibration sweeps with L1 at 18:30.

• Wind and microseism are moderately low
• All other systems nominal

TITLE: 04/28 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 151Mpc
INCOMING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 5mph Gusts, 2mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.11 μm/s
SHIFT SUMMARY:
Very quiet night.
The Wind is dieing down finally.
H1 Has been locked for 12 Hours and 12 minutes, and Observing.

BRS Drift Trends--Monthly Famis 26442

Trends go all the way back to Febuary which is when we let air into the vacuum chamber, so the ETMY Damp CTRL signal does make sense for that time frame in Febuary and early March.
BRSX has a few interesting spikes, April 2nd or 3rd Jim was adjusting the mass adjuster pico meter.
March 6th & 7th ish there was  some BRSX work & computer restart due to BRS not damping .

But Both BRS X & Y are within range!

A PCAL EndX Station Measurement was done on April, the PCAL team(    
 Dripta B. & Tony S.) went to EndX with Working Standard Hanford aka WSH(PS4) and took an End station measurements.
The EndX Station Measurement was carried out according to the procedure outlined in Document LIGO-T1500062-v15, Pcal End Station Power Sensor Responsivity Ratio Measurements: Procedures and Log.

Measurement Log
First thing they should have done was take a picture of the beam spot before anything is touched!

Martel:
Martel Voltage source applies voltage into the PCAL Chassis's Input 1 channel. We record the GPStimes that a -4.000V, -2.000V anhttps://alog.ligo-wa.caltech.edu/aLOG/uploads/77467_20240427213103_SPot.jpgd a 0.000V voltage was applied to the Channel. This can be seen in Martel_Voltage_Test.png . We also did a measurement of the Martel's voltages in the PCAL lab to calculate the ADC conversion factor, which is included on the above document.

Plots while the Working Standard(PS4) is in the Transmitter Module during Inner beam being blocked, then the outer beam being block, followed by the background measurment: WS_at_TX.png.

The Inner, outer, and background measurement while WS in the Receiver Module: WS_at_RX.png.

The Inner, outer, and background measurement while RX Sphere is in the RX enclosure, which is our nominal set up without the WS in the beam path at all.:  TX_RX.png.

The last picture is of the Beam spots after we had finished the measurement.

All of this data is then used to generate LHO_EndX_PD_ReportV2.pdf**** which is attached, and a work in progress in the form of a living document.

All of this data and Analysis has been commited to the SVN :
https://svn.ligo.caltech.edu/svn/aligocalibration/trunk/Projects/PhotonCalibrator/measurements/LHO_EndX/

PCAL Lab Responsivity Ratio Measurement:
A WSH/GSHL (PS4/PS5)FrontBack Responsivity Ratio Measurement was ran, analyzed, and pushed to the SVN.
The analysis of this measurement produces 4 PDF files which we use to vet the data for problems.
raw_voltages.pdf
avg_voltages.pdf
raw_ratios.pdf
avg_ratios.pdf

Obligitory BackFront PS4/PS5 Responsivity Ratio:
PCAL Lab Responsivity Ratio Measurement:
A WSH/GSHL (PS4/PS5)BF Responsivity Ratio measurement was ran, analyzed, and pushed to the SVN.
The analysis of this measurement produces 4 PDF files which we use to vet the data for problems.
AlphaTrends
raw_voltages2.pdf
avg_voltages2.pdf
raw_ratios2.pdf
avg_ratios2.pdf

This adventure has been brought to you by Dripta B. & Francisco L.

TITLE: 04/27 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
OUTGOING OPERATOR: Ryan S
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 23mph Gusts, 14mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.11 μm/s
QUICK SUMMARY:
Wind speeds are elevated, but H1 has been Locked and Observing for over 4 hours.
Robert has an accelerometer line going through the Hallway, out the door and across the road. Please dont drive down Y arm until after the cable has been removed sometime tomorrow.

TITLE: 04/27 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
INCOMING OPERATOR: Tony
SHIFT SUMMARY: One lockloss and an earthquake this shift, but otherwise a quiet one. Since neither H1 nor L1 were locked for the scheduled 18:30 UTC coordinated calibration sweeps, we have postponed them until tomorrow at the same time.

• 16:50 - Incoming EQ from Christmas Island
• 17:18 - Lockloss (alog77463)
• 17:33 - EQ mode activated while relocking
• 18:47 - Reached NLN
• 18:49 - Started observing

H1 has now been locked for 4 hours.

LOG:

Lockloss @ 17:18 UTC - link to online lockloss tool

There was a M6.1 quake from Indonesia incoming at the time, although I don't immediately see evidence that ground motion caused this lockloss.

Sat Apr 27 10:10:32 2024 INFO: Fill completed in 10min 28secs

Fri Apr 26 10:10:46 2024 INFO: Fill completed in 10min 42secs

Jordan confirmed a good Friday fill curbside.

TITLE: 04/27 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
OUTGOING OPERATOR: Oli
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 3mph Gusts, 2mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.12 μm/s
QUICK SUMMARY: Looks like H1 lost lock around 6 hours ago from a M6.5 EQ from Japan and Oli was able to help it back up. H1 has been locked and observing for 3 hours.

• Microseism is trending down and wind is low
• All other systems nominal

There was a drop in clean range around 5:20 this monrning, which doesn't seem to be a reapeat of the output arm shift we had earlier this week. 

Attached is a trend of the DARM blrms (based on DARM error, no calibration corrections or cleaning) and comparison of the cleaned and corrected range against the CAL-DELTAL range, only the cleaned channel sees the drop.  This made me concerned that we had a drop in optical gain, but the trend of the time dependent calibration correction factors doesn't show anything happening at this time. 

I don't know what would cause a sudden change in the clean range, since I don't think that the jitter subtraction would cause a sudden change like this.