These tasks are being postponed until the COVID-19 restrictions are removed. 

   Currently the PSL is shutdown for post O3 upgrades. Additionally, the plumbing in the PSL enclosure is to be reworked for the new laser configuration. 

   The above factors render these check moot, therefore no need to make an entry into the PSL enclosure. 

Closing FAMIS #13090

   These tasks are being postponed until the COVD-19 restrictions are removed. 

Closing FAMIS #12981

The control room FOM machine nuc22 has been showing two copies of the vacuum overview screens during the day (with only one updating). I rebooted this machine at 22:18 and restored the wind speed and vacuum plots.

TITLE: 03/30 Day Shift: 15:00-23:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Commissioning
LOG:

14:56 UTC Took IFO from NLN to READY
15:00 UTC Jason shutting down PSL
15:02 UTC Jason done
15:04 UTC Richard purposely trips lasers from control room. Checking that they are all off.

The laser, oven, and all other electronics in the Pcal lab have been shut off for phase 3.

Richard already turned off all of the lasers and cameras physically (alog55819), and then I turned things off on the software side as well.

TCS

I took the TCS_ITM{X/Y}_CO2 Guardians to their DOWN state. I left their associated PWR nodes in the FAULT state since they don't have any laser power.

I left the ring heaters on.

HWS

I stopped the code on all of the machines in their tmux sessions. I turned off the CS SLEDs, cameras, and RCX links, from the medms. I also did this for EX and EY was already mostly off.

All trends look nominally ok, right up until they all dropped off the scope :/ . It seems that the DCHILLFLOW finally found a happy spot after stepping down one last time.

I've added a new "Vacuum" sidebar entry on the main CDS webpage (https://lhocds.ligo-wa.caltech.edu/index.html) to speed up viewing the vacuum overview snapshots.

The vacuum overview is snapshotted in two locations, the MEDM snapshots service (captures the medm version) and the control room FOM screen capture (captures the CaQtDm version). Both are displayed on the new vachome.html page linked by the sidebar entry.

Centering looks good. 

All oplev Sums, and Yaws are all within expected range. All Pits are within expected range except for ETMX. This was recently centered.

Started the shutdwon of the end stations after Jason shut off the PSL.  My first was a test of the interlock system. I pushed the kill button in the control room, Patrick T. restored the safety and I verified the lasers wer off.

EX-

• Photon Calibrator CryistaLaser- Key Removed
• ALS Laser- Key Removed
• HWS Source - Power removed and knob turned to off
• HWS Camera- Power supply on floor powered off.
• ESD-  Both High Voltage supply and +-18,+-48Vdc supply also shut down.

EY-

• Photon Calibrator Crystalaser- Key Removed
• ALS Laser- Key Removed
• HWS Source-  Not in place
• HWS Camera- Power supply on floor powered off
• ESD- Both High Voltage supply and +-18,+-48Vdc supply also shut down.

Corner Station-

• Turned off High Voltage Power supplies on Mezzanine
  • ESD Power supply off
  • PSL+-150 VDc +375VDc Powered Down
  • Sqeezer TTFFS HV pwered off
  • Ham 6 Shutter HV powered off
  • Ham 6 PZT powered off
  • TCS X and Y 100V Power Supply powered off.
• PSL- Make up air on PSL turned up to 100%
• TCS-Y- Key Removed Power supply in Mechanical Room off.  RF-40.668MHz off
• TCS-X- Key Removed Power supply in Mechanical Room off.  See RF above
• Squeezer Laser- Key removed
• HWS X-Y camers- Power supply under table off
• HWS X-Y Sled- Off by MEDM

All the SEI platforms are in ISI_DAMPED_HEPI_OFFLINE, ISI damping loops are engaged, but HEPI controls are off.

The suspensions are currently in the ALIGNED state (which was last week planned to be in the Damped, however after discussing with Jenne and Betsy this morning, we decided to keep it in Aligned state) - in response to the LHO PHASE 3 transition (COVID-19). In the ALIGNED state the beam will be centered on the OPLEV and we have useful OPLEV data.

This morning, in accordance with LHO's move to Phase 3 operations of our COVID-19 response, I shut down the PSL (WP 8581).  All stabilization loops (PMC, ISS, FSS) were disabled, then the laser was shut down; both shutters (external and 35W internal) are closed.  The chillers remain on for the moment, they will be shut down and drained by J. Bartlett and R. Savage at a later date.

Since we lost lock this morning, I took this opportunity to change the max gain to nominal values for ITMY mode 3, 12 and 15. Previously these modes had their max gain set to zero (although we had non zero nominal values for them). Often Guardian would set the gain to max for these modes and hence stop damping them - which is not ideal. In the changed scenario, Guardian will damp these modes regardless of whether max or nominal gain is applied. I have committed the lscparams.py on the svn and loaded the coefficients.

I will track their development over the next few lock stretches.

Cheryl (over phone), Rahul

This morning we made changes to the damping filter for ITMX mode 2,3,4. We narrowed down the band pass filter and moved them away from Interfering from each other. Next we loaded the coefficients and made the gains to be zero on lscparam (followed by svn commit). Jeff. B then attempted to lock  the IFO and during this time I found a good gain settings for ITMX mode 3 (gain of -20) and was tinkering with IMTX mode 2 (with a very small gain of -0.1). We lost lock after some time hence I was not able to find a good value for mode 2. 

During the second attempt of locking, the modes were rung up and we lost lock very quickly. Next I reverted all the damping filter settings (including lscparams) back to how it was this morning at 8am. In the third attempt I requested Jeff. B to hold on at PREP_ASC_FOR_FULL_IFO, while I was manually damping the rung-up modes. We stayed at this state for an hour or so, and the rung up modes were damping well. Hence I requested Ed (who took over form Jeff. B) to start moving up the ISC lock state - here we lost the lock once again.

In the fourth attempt, the violins looked fine and we are currently locked and Observing (at 0:14 UTC).