PT110 (HAM6 pressure gauge) showed some sort of "hiccup" - see attached.

I lowered the exposure for the IO GigE cameras on the PSL from 4000 to 100.  At this new exposure the cameras are not saturated at 30W.  The beams are hard to see at 2W, but the SUM is still sufficient for reasonable x/y data.

Sheila, Fil, T Vo

We got a little time at the end of PEM injections to try a different method of disconnecting the ETMX ESD cables.  We had the sheildling box already installed at EX, so we went there and first disabled the HV ESD driver, then powered off the low voltage driver.  Fil grounded the sheilds of the ESD cables using the grounding box, and then disconnected the LL cable from the shielding box (on the chamber side) and connected it to the grounding box he made on monday.  The interferometer stayed locked and the noise didn't change, but just as we were touching the cables on the input side of the shielding box the interferometer unlocked.  It seems like something is extremly touchy here, which we already knew. 

IFO is locked at NLN, Intent Bit is Commissioning. Robert S. doing PEM injections from 16:00 to 20:00 (09:00 to 13:00PT). 

   HFD responded to fire alarm at LSB. Bubba and Richard were notified. Appears to have been a false alarm. 
 

PT343b at the X-mid went off at about 10:30 hrs. local.  I re-enabled it and it came back on in a few minutes.  John W. contacted Gil Hibbs who was in the X-mid VEA at the time.  Gil didn't think that he was near the area of the gauge.  Perhaps just coincidence.  We have had gauges along the X-arm turn off a few times this year when there was human traffic in the area of the gauge(s) but no causal determination has been shown.  Probably unrelated.  

John and I both got emails when the gauge dropped out but no texts (5 minute threshold for texts?)

   TJ swept LVEA before the start of commissioning. He unplugged one unused extension cord. 

TITLE: 08/09 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 53Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: No issues to report.
LOG:

14:36 UTC Ken pulling wire in OSB.

Have remained in observing. No issues to report.

TITLE: 08/09 Owl Shift: 07:00-15:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 54Mpc
OUTGOING OPERATOR: Ed
CURRENT ENVIRONMENT:
    Wind: 5mph Gusts, 2mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.06 μm/s 
QUICK SUMMARY:

0.03 - 0.1 Hz seismic BLRMS is coming down from after earthquakes near Alaska.

07:25 UTC Lock clock not updating. Lock timer python script not running. Started. Screenshot attached.

TITLE: 08/09 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Observing at 53Mpc
INCOMING OPERATOR: Patrick
LOG: N/A

SHIFT SUMMARY:

Mid_Shift Summary (never got posted)

After many failed attempts to recover lock after the EQ(s), I performed initial alignment. The furthest I've been able to get thus far is LOWNOISE_ESD_ETMY. I had to pause at DC readout to tame some ETMX violin modes.

Lockloss problems included:

• LOWNOISE_ESD_ETMY - consistent problem
• Trouble with ALS - intermittent problem; still not reconciled.
• CARM_ON_TR - random. Happened once. Not atypical.

ETMX Violin Mode damping:

• I noticed that the VIOLIN_MODE_DAMPING_1 default gain for mode 4 was causing that mode to ring up.
  • it starts at 50 but this seems to cause it to ring up a bit. I immediately turned it down to 20 while damping mode 2...segue
  • mode 2 has no gain on it and has been ringing up higher than mode 4 according o the new DTT template. I immediately set this gain to 50 and perhaps this should be hard coded. After this damping takes effect mode 4 can be turned up to 50. It will need to be.
  • the screen shot below is how modes 1-5 should look ( at least for now?)
  • also, PEM awg was left running and had to be halted in order to set the intention bit.

Lots of phone time with Sheila got H1 back in business.

I'd like to suggest that next time an earthquake takes us down we wait to re-lock and assess any artifacts from the event before beginning maintenance on the IFO and then take it down on our own terms to begin making changes.

06:27 H1 back to Observing

23:50UTC whilst trying o acquire lock and 95% of the way there, a 6+mag EQ in Khazakstan‌ took us down. The Observatory mode wasn't switched to environment until 00:40. Apologies for the late action.

Both X and Y End Stations had their pre-end-of-O2 calibration measurements today.  Full results can be found for: EndX and EndY.  The resulting PCal Force Coefficients are:

Currently used O2 force coefficients:

     LHOX: none, not used

     LHOY: RxPD = 1.0475e-9 N/V

               TxPD = 1.5160e-9 N/V

This measurement:

     LHOX: RxPD = 1.0473e-9 N/V

                TxPD = 1.3164e-9 N/V

     LHOY: RxPD = Not calculated due to clipping

               TxPD = 1.5202e-9 N/V

Note: The values I list for "This measurement" don't match what is shown in the results found at the links posted above.  This is due to the fact that we calculated these numbers by hand since they are corrected for optical efficiency, which we know to be an issue related to the known clipping.  We used the optical efficiency that was measured in previous measurements before clipping started. 

For LHOY TxPD, this give us 0.28% variation between this measurement and the O2 epics value.

TITLE: 08/08 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Preventive Maintenance
OUTGOING OPERATOR: Travis
CURRENT ENVIRONMENT:
    Wind: 11mph Gusts, 7mph 5min avg
    Primary useism: 0.02 μm/s
    Secondary useism: 0.06 μm/s
QUICK SUMMARY:

Currently trying to debug ALS troubles. Sheila is on the case.

Maintenance tasks: all times UTC

• 15:00 - Bubba - scafolding in CER - done?
• 15:00 - Kyle - EX - TMDS commissioning
• 15:00 - Betsy - charge measurements - done
• 15:00 - JeffK - rubbing checks on singles
• 15:20 - Karen - EY - cleaning - done
• 15:28 - Betsy - LVEA - gathering tools - done
• 15:30 - Rick, Sudarshan - EY - Pcal spots
• 15:30 - Fil - LVEA squeezer prep
• 15:35 - Amber - tour to LVEA - done
• 15:37 - Chris - LVEA - 1ton to receiving and opening inner roll up door - done
• 15:37 - Bubba - LVEA - running cleanrooms for a short time to check fans
• 15:42 - LN2 delivary to MY or EY???
• 15:44 - Jason - pump diode adjustment - done
• 15:45 - Pest Control here to spray
• 15:54 - Robert - LVEA - setting up for measurements
• 16:03 - Sheila - EX and then EY for replacing ESD grounding
• 16:18 - Liz - EY and MY to check fire pannel keys
• 16:40 - Karen leaves EY
• 16:45 - Betsy to LVEA for more SUS parts inventory
• 16:46 - Chris and Pest Control to EY and EX
• 16:51 - Liz - back from outbuildings
• 16:58 - TMSY trips - ISI rung up, unknown cause
• 17:16 - DaveB, TJ - rebooting H1fescripts0
• 17:33 - Dave, TJ - no external triggers - temporarilly
• 17:35 - Rick, Sudarshan - done at EX, leaving WiFi and computer on for Travis
• 17:35 - Travis - done at EY - now laser safe
• 17:45 - Thomas - Pcal transfer functions
• 17:53 - Hugh - End Stations to check HEPI fluid levels
• 17:56 - Amber - tour in LVEA
• 18:02 - Betsy - done
• 18:02 - Christine, Nicole - EY
• 18:15 - JeffK - done with rubbing checks
• 18:19 - Thomas - done with Pcal TF
• 18:23 - Rick - LVEA looking to talk to Robert
• 18:47 - Hugh - back from End Stations
• 18:54 - Christine, Nicole - leaving EY
• 18:55 - Bubba - done in LVEA
• 19:16 - Kyle - done at EX, has about 20 minutes of unloading at CS
• 19:23 - Robert - done in LVEA
• 19:27 - DaveB - external trigger certificate issues is not corrected - done

Current:

• 19:27 - Sheila has H1 and is commissioning

SudarshanK, RichardS

We moved the Pcal beam back to their optimal position at 111.6 mm away from the center of the optic. The actual position of the  current Pcal beams (last column) along with the history of where they were are in the table below. The number quoted on the table are distance of Pcal beam (in mm) from their optimal position of [0, +/- 111.6] mm. 

We also re-centered the Pcal beams on the receiver side to relieve it from any clipping that was happening outside the vacuum. The spectra attached below shows no significant clipping on the Rx beams.

We will run a set of calibration lines (from 4501.3 - 1501.3 at 500 Hz interval) with this Pcal beam configuration for about a week.

T Vo, Sheila

We measured a transfer function from PCAL X to DARM this afternoon.  The attached screenshot shows a comparison of driving the ETMX ESD in the low noise state (with the settings that allowed us to transition to it from ETMY) and a drive to PCALX_DARM with the filters that Thomas copied from the ESD filter banks.  The red trace (ref 14+15) were taken with a gain of -150 in the PCAL filter bank.