TITLE: 07/29 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
SHIFT SUMMARY: One lockloss from an earthquake that didn't make us wait too long to relock. Quiet evening otherwise.

• 2325 Heard and saw on cameras three low-flying helicopters over corner station
• 0129 Incoming 5.6 EQ from El Salvador
  • 0135 EQ mode activated
  • 0145 Lockloss - ends lock stretch at 29.5 hours
  • 0209 Seismic to CALM
• 0147 Took H1_MANAGER to 'IDLE' and ISC_LOCK to 'DOWN' until ground motion settles
• 0206 Requested 'INIT' then 'LOW_NOISE' on H1_MANAGER to start relocking
  • Fully automatic relock
• 0250 NLN (and another incoming EQ from Central America)
  • 0309 Seismic to CALM - EQ didn't show
• 0304 Observing
  • Waited 14 minutes for camera servos to turn on

Handing off to Oli for the night.

LOG:

State of H1: Observing at 148Mpc

Just resumed observing having recovered from the earlier EQ-caused lockloss.

The ISS diffracted power had drifted high again (hovering just above 3%), so after this evening's lockloss I adjusted the RefSignal from -1.98V to -1.99V to bring the diffracted power back to around 2.5%.

Lockloss @ 01:45 UTC - 5.6 magnitude earthquake from El Salvador.

I've taken H1_MANAGER to 'IDLE' and ISC_LOCK to 'DOWN' until the ground motion settles.

TITLE: 07/29 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 143Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 16mph Gusts, 13mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.10 μm/s
QUICK SUMMARY: Taking over from Tony. H1 has been locked at low noise for 26.5 hours.

• CDS/SEI/SUS all okay
• Winds are moderate, PSL and lab dust monitors have reported high counts (as expected)

TITLE: 07/29 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 145Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 16mph Gusts, 12mph 5min avg
    Primary useism: 0.03 μm/s
    Secondary useism: 0.09 μm/s 
QUICK SUMMARY:

21:37 PSL Dust mon alarm started goign off during the Gusty high winds today.

Other wise very quiet shift.

No Log.

ENDY Station Measurement
During the Tuesday maintenace, the PCAL team(Julianna Lewis & Tony Sanchez) went to ENDY with Working Standard Hanford aka WSH(PS4) and took an End station measurement.
The ENDY 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, and was completed by 11 am.

First thing we did is take a picture of the beam spot before anything is touched!

Martel:
We started by setting up a Martel Voltage source to apply some voltage into the PCAL Chassis's Input 1 channel and we record the times that a -4.000V, -2.000V and a 0.000V signal was sent to the Chassis. The analysis code that we run after we return uses the GPS times, grabs the data and created the Martel_Voltage_Test.png graph. 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 document.

After the Martel measurement the procedure walks us through the steps required to make a series of plots while the Working Standard(PS4) is in the Transmitter Module. These plots are shown in WS_at_TX.png.

Next steps include: The WS in the Receiver Module, These plots are shown in WS_at_RX.png.

Followed by TX_RX.png which are plots of the Tranmitter module and the receiver module operation without the WS in the beam path at all.
The last picture is of the Beam spot after we had finished the measurement.
All of this data is then used to generate LHO_ENDY_PD_ReportV2.pdf which is attached, and a work in progress in the form of a living document.

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

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

All data and Analysis has been commited to the SVN.
https://svn.ligo.caltech.edu/svn/aligocalibration/trunk/Projects/PhotonCalibrator/measurements/LabData/PS4_PS5/

A surpise BackFront PS4/PS5 Responsivity Ratio appeared!!
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.
raw_voltages2.pdf
avg_voltages2.pdf
raw_ratios2.pdf
avg_ratios2.pdf

This adventure has been brought to you by Julianna Lewis & Tony Sanchez.

16:50 UTC FMC-MY_VEA202B_DEGF alarm went off for Temp in Mid Y station
Seems like it may have gotten too cold in Mid Y. I'll keep and eye on it throughout my shift hopefully as the day warms up it will warm up a bit.
17:04 UTC FMC-MY_VEA202C_DEGF alarm went off followed a few moments later by H0:FMC-MY_VEA_202D_DEGF
Seems like the AC heater just isn't turning ON.

The temps are just below 60F which seems pretty darn cold when Mid X temps tend to be between 67 -70 F .

Sat Jul 29 10:10:44 2023 INFO: Fill completed in 10min 39secs

TITLE: 07/29 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 3mph Gusts, 1mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s 
QUICK SUMMARY:
Current IFO Status: LOCKED in NOMINAL_LOW_NOISE  & OBSERVING

 

TITLE: 07/29 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 148Mpc
SHIFT SUMMARY:

Quiet night. We've been Locked for 18hrs 51mins.

7:00 Locked for over 11 hours.

13:58 Earthquake mode activated (nearby sudden seismic event but thankfully didn't lose lock - (see attached for ndscope of peakmon)
14:18 Back to CALM

LOG:

no log

Still Observing and have been locked for 14hrs 53min. Everything has been quiet except for the one quick out-of-Observing/back-into-Observing that we had earlier (71806).

TITLE: 07/29 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 147Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 5mph Gusts, 4mph 5min avg
    Primary useism: 0.01 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

Taking over from Ryan S. Detector Observing and Locked for 11hrs 7mins. Hopefully it'll continue being a quiet night!

TITLE: 07/29 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 149Mpc
SHIFT SUMMARY: Quiet shift this evening. H1 has been observing for the duration, a total of almost 11 hours now.

• 0548 MY low temp alarm, same as last night
  • Possibly related to the noisy fan? alog 71802

Handing off to Oli for the night.

LOG:

No log for this shift.

State of H1: Observing at 152Mpc

H1 has been observing for almost 7 hours. Very quiet evening so far.

FAMIS 25592, last checked in alog 71603

All of the out building fans look to have been switched to their counterparts on July 18th (Tuesday maintenance). There is not a specific log that I can find of this being done, but Tony's operator log from that day notes that fans were greased, so I assume this was done at that time.

Since this set of fans was turned on, all of them look fine except for MY FAN1, which appears very noisy (above the arbitrarily defined threshold of 0.7 noted in the FAMIS ticket). This was first reported by Oli in the previous check and escalated to the facilities team.

CS fans look fine.

After finding this nice table describing the changes to the OM2 heater, I started growing suspicious of these changes because while also trying to chase down the 1.6611 Hz comb seen in h(t) (see LHO aLOG 71108), the dates seemed to align with each other that was too close to be coincidental.

Not knowing yet what channels I should look at for these changes, I just took a guess that H1:AWC-OM2_TSAMS_THERMISTOR_1_TEMPERATURE and H1:AWC-OM2_TSAMS_THERMISTOR_2_TEMPERATURE, would be a good enough proxy for seeing what changes might correlate with the comb changes. I took a trend of these channels since May 15 to July 27 to see those changes and then plot on top of them the changes I have seen in Fscan spectra over that time. The curves are the two channels and the vertical lines mark *approximate* times when a comb appears (red), changes to a lower level (yellow), or mostly vanishes (green). The vertical lines are pretty close to significant changes in the OM2 heater settings, at least according to what I can see with Fscan.

I suggest further investigation is needed here to understand what the heater is doing that could be adding line artifacts to the DARM loop and degrading the data quality in h(t).

TITLE: 07/28 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 146Mpc
SHIFT SUMMARY: Two lock losses caused by commissioning activity today, but two fully automated relocks. We've been observing for almost 3 hours.
LOG:

• 1613 Out of Observing for commissioning
• 1615 Lock loss
• 1738 Back to low noise, Commissioning starting again
• 1816 Lock loss
• 2024 Observing

TITLE: 07/28 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 150Mpc
CURRENT ENVIRONMENT:
    SEI_ENV state: CALM
    Wind: 11mph Gusts, 9mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.05 μm/s
QUICK SUMMARY: Taking over from TJ. H1 has been locked and observing for almost 3 hours.

• CDS/SEI/SUS/dust all looks good