This morning the TCS-Y chiller water level had dropped to 9.0cm. I added 500ml water to bring it back up to 10.0cm. This means the chiller is losing about 0.5l/day.
TITLE: 05/22 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 109Mpc
INCOMING OPERATOR: Jim
SHIFT SUMMARY:
Quiet night
LOG:
11:01 GRB - acknowledged with LLO (Gary T)
12:22 restarted Verbal Alarms
13:31 Intention bit Commissioning - squeezer unlocked
13:33 Intention bit Observing - squeezer re-locked
14:30 I noticed there is some noise in DARM between 20 and 60 Hz
With help from Stuart Aston at LLO and RahulK, BetsyW, JeffK, and EdM at LHO, this entry documents our current best understanding of the suspended masses of the ETMs.
Note that the Photon Calibrators generate calibrated forces on the ETMs via radiation pressure. The overall uncertainty of the actuation forces is below 1%, closer to 0.5% for the observing run.
To accurately translate these calibration forces into calibrated displacements, we require accurate masses of the suspended ETMs. A 0.1% error in the suspended mass directly couples into a 1% error in the calibrated displacements.
Here is what we know:
LHOx - 39611 grams
LHOy - 39538 grams
LLOx - 39508 grams
LLOy- 39642 grams
44 grams (2 x 22 grams)
The total mass of AMD1, 2, 3 and 4 is 0.80gm, 0.54gm and 0.39gm and 0.32gm respectively.
Total: 2.05 g
Rahul looking into this issue.
So our current best guesses for the masses are (neglecting the fibers for now):
LHO EX: 39611 + 44 + 2.05 = 39657 g
LHO EY: 39538 + 44 +2.05 = 39584 g
LLO EX: 39508 + 44 +2.05 = 39554 g
LLO EY: 39642 + 44 + 1.78 = 39688 g (Missing one AMD)
h1etmx.m
pend.m3 = 39.603+ear_mass_total; % 39.647 = 39.603 + ear_mass_total; Updated on 7 Aug 2015 by K.Izumi, ETM 08 on https://galaxy.ligo.caltech.edu/optics/. +0.044 from Betsy to include ear weight.
h1etmy.m
pend.m3 = 39.597 + ear_mass_total; % 39.641 = 39.597 + ear_mass_total; Updated on 12 feb 2014 by Brett Shapiro, ETM 12 (H1ETMY) on https://galaxy.ligo.caltech.edu/optics/.
l1etmx.m
pend.m3 = 39.508 + ear_mass_total; % 39.552 = 39.508 + ear_mass_total; Updated on 15 Feb 2019 by Stuart Aston, old ETM 07 new ETM 10 (L1ETMX) on https://galaxy.ligo.caltech.edu/optics/.
L1etmy
pend.m3 = 39.642 + ear_mass_total; % 39.686 = 39.642 + ear_mass_total; Updated on 15 Feb 2019 by Stuart Aston, old ETM 09 new ETM 15 (L1ETMY) on https://galaxy.ligo.caltech.edu/optics/.
Thus the masses in the suspension models as of May 22, 2019 seem to be (models may not be including the 2 g from the AMDs):
LHO EX: 39603 + 44 + 2.05 = 39649 g
LHO EY: 39597 + 44 +2.05 = 39643 g
LLO EX: 39508 + 44 +2.05 = 39554 g (was 39552 +46 = 39598 until 2/15/2019)
LLO EY: 39642+ 44 +1.78 = 39688 g (was 39686+46 = 39732 until 2/15/2019)
Summary
H1ETMX
Current model value 39649 g, should be 39657 g, error: model 8 g lighter than actual (0.02%)
H1ETMY
Current model value 39643 g, should be 39584 g, error: model 60 g heavier than actual (0.15%)
L1ETMX
Current model value 39554 g (correct value)
L1ETMY
Current model value 39688 g, was 39732 g until Feb 15, 2019, error: model 44 g lighter than actual (0.11%)
All plots seem nominally ok. FSS TPD is currently at 2.535V, which is a bit low and the reflected spot has shifted from it's previous alignment.
Laser Status:
Front End Power is 32.08W (should be around 30 W)
70W Output Power is 69.49W
Front End Watch is GREEN
70W Watch is GREEN
PMC:
It has been locked 7 days, 14 hr 19 minutes (should be days/weeks)
Reflected power = 10.04Watts
Transmitted power = 54.78Watts
PowerSum = 64.81Watts.
FSS:
It has been locked for 0 days 7 hr and 5 min (should be days/weeks)
TPD[V] = 2.543V (min 0.9V)
ISS:
The diffracted power is around 2.2%
Last saturation event was 0 days 7 hours and 5 minutes ago (should be days/weeks)
Possible Issues:
TITLE: 05/22 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 106Mpc
OUTGOING OPERATOR: Travis
CURRENT ENVIRONMENT:
Wind: 3mph Gusts, 1mph 5min avg
Primary useism: 0.02 μm/s
Secondary useism: 0.32 μm/s
QUICK SUMMARY:
Smooth handoff from Travis. Front door was ajar upon my arrival.
TITLE: 05/22 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 107Mpc
INCOMING OPERATOR: Ed
SHIFT SUMMARY: New lock is now 6 hours old. No issues to report after Georgia fixed the ASC issues preventing us from getting to NLN.
LOG:
0:05 Kyle back from MY
4:03 Briefly out of Observe so Georgia can reload ISC_LOCK
4:43 Out of Observe due to SQZ losing lock
4:44 Back to Observe, SQZ relocked itself
We had some problems engaging the SRC ASC after maintenance day today.
I don't understand why we needed this offset at 2W and not at 5W. But as a temporary stopgap I will put it in the guardian, switching it on at PREP_ASC_FOR_FULL_IFO (line 2475), and switching it off at INCREASE_POWER (lines 3391 and 3392, hopefully no typos this time, sorry Jim!)
Patrick and Travis also noted that ALS_COMM required human intervention a few times while locking, the offset needed to be tuned up by hand and at least once the x-arm green alingment required tweaking in order to complete the FIND_IR state.
After 88:46:58-long nominal low noise lock was lost, we quickly drove to the EX to check the beam position on curved optics on TMSX telescope as well as the ISCTEX. We didn't expect this to be really bad but if we want to pico or set new offset to green QPD we need to at least have some idea about the starting point.
TMSX primary mirror was photographed from inside ISCTEX through the viewport for IR transmission using a monopod with cell phone attachment (glorified selfie stick) to go close. Though not totally in focus, you can see that the beam spot is low and close to me.
The secondary mirror beam spot was pictured using an unused IR analog camera port. We have found that the location of the illuminator and the camera (T1000746 Viewport FDR page 41) are inverted, i.e. the camera port was lower, which allowed us to look at the secondary very clearly. No disaster here. BTW the illuminator was not usable (no power, probably the bad cable).
On ISCTEX, two 1" lenses looked good (ALS-L5 and L6 in D1800270 ISCTEX Optical Layout) and the 2" lens ALS-L7 was fairly off for my taste. We checked the PBS for combining Hartmann and ALS green but nothing suspicious.
We would have fixed at least the table but it was already 12:30-ish so we gave up. Will check EY next week.
TITLE: 05/22 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
OUTGOING OPERATOR: Jim
CURRENT ENVIRONMENT:
Wind: 12mph Gusts, 7mph 5min avg
Primary useism: 0.04 μm/s
Secondary useism: 0.41 μm/s
QUICK SUMMARY: Georgia is working on ASC issues that are preventing us from getting to NLN.
The IFO lock broke at 11 am following which charge measurements on the ETMX and ETMY were performed. Results are attached below. For the ETMX the bias voltage is around 20-30 V and the long term trend also looks fine (is not rising too quickly). For the ETMY, the effective bias is within 10-30 V, except for the Yaw in the 2nd quadrant which is around 40V. The long term trend for the 2nd quadrant for the pitch and yaw mode, looks to be slowly rising; the other quadrant looks to be within the permissible limit.
The slider values for the optical levers were reset to their original position after the measurements were completed. Any SDF differences were removed too.
TITLE: 05/21 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Lock Acquisition
INCOMING OPERATOR: Travis
SHIFT SUMMARY:
LOG:
15:15 Hugh, Richard to EX
15:15 Robert and crew to LVEA
16:00 Marc to PSL rack
19:09 UTC DMT restarts done 19:09 UTC Hugh and Filiberto to end X 19:18 UTC Jeff J. to end X 19:18 UTC Gerardo out of LVEA 19:33 UTC SEI back to WINDY 20:25 UTC Initial alignment done. No issues. 23:03 UTC Hugh found end station illuminators were still switched on. Switched them off.
Got the bird nest cleared out (thanks Chris) and Richard hauled the cable up securing the last available anemometer to the frame of the weather station array, see first image. Second image includes the proto type fence in the background, sadly no shots of me or Richard. The third attachment has the new layout with some dims and sensor numbers. Instrument #3 which been just 2' above ground, AGL, just behind the fence was moved as far up wind, to the southwest, as available cable would allow; the instrument is 16'agl. Ideally that would have been sensor_1 but that cable must be faulty, we reconnected it with sensor_3 cable and it worked. Wind_Speed_2 is unmoved and is 12'agl.
Betsy, Patrick **Found WAP plugged in, despite being green on CDS. Unplugged.** Switched off power strip for computer in CER Unplugged RJ11 for phone in CER, phone power was unplugged **Found portable phone sitting in plugged in charger next to GV7. Unplugged charger, removed batteries from phone.**
End X illuminator is not functioning, appears to be field cable issue. Will look at next Tuesday.
Wind sensors were reported offline last Thursday, alog 49289. Beckhoff EP3174-0002 terminals and hub were power cycled. One of the terminals came back in PreOp state. Patrick logged into H1ECATX1 and changed state to Op.
Looked at cabling for PR3 camera. Found no issues with cabling. Camera was power cycled but still unresponsive. Carlos logged into the digital video server and was able to disable and restart the camera. Camera is now back online.
TSC-X chiller water level was full. Added no water. TCS-Y chiller has a leak in the front part of the chiller (perhaps pump shaft seal, loose fitting, hose leak). There is water on the floor. Did not pull panels as the chiller is still running. Added 2700ml of water to bring the level back up to 10.1. Informed Betsy of the leak. Closing FAMIS #11492
The V1 and V2 baluns in the LVEA were exchanged with the latest V3 baluns. Work is recorded on this ALOG-48165 to keep everything nice and tidy.
Theoretically, I estimated that each fused silica fibres should have a mass of about 0.494 grams, however if we consider around half of the fibre bending (when pendulum swings) then it should be around 0.247grams. Making a total of 0.988 grams for all four fibres.
If we want more precision, then it is better to take into account the actual bending length (which should around 20 mm from the top of the fibre). This should be around 0.172 grams (0.688 grams for all 4 fibres).
Seems there is a typo in what I wrote earlier.
"A 0.1% error in the suspended mass directly couples into a 1% error in the calibrated displacements." should have been "A 0.1% error in the suspended mass directly couples into a 0.1% error in the calibrated displacements."