TITLE: 12/07 [OWL Shift]: 08:00-16:00 UTC (00:00-08:00 PDT), all times posted in UTC STATE Of H1: Unlocked OUTGOING OPERATOR: Cheryl QUICK SUMMARY: Cheryl has been having trouble locking MICH in initial alignment. Two earthquakes have just hit as I came on shift: 5.6 34km NW of Illapel, Chile 2015-12-07 07:51:11 UTC 48.4 km deep 7.2 109km W of Murghob, Tajikistan 2015-12-07 07:50:07 UTC 28.7 km deep A number of watchdogs have begun to trip. From the cameras: The lights are off in the LVEA. The lights are off in the PSL enclosure. I can not tell if the lights are on or off at mid X and mid Y. The lights are off at end X. The lights are off at end Y. The 0.03 - 0.1 Hz (earthquake) seismic band has so far risen to ~ 5 um/s with the earthquakes. The 0.1 - 0.3 Hz (microseism) seismic band is above the 90 percentile and has risen above .5 um/s with the earthquakes. The winds are between 0 and 20 mph. The ISI blends are on the nominal 45 mHz configuration. From pinging: CDS WAP is off at the LVEA. CDS WAP is on at mid X. CDS WAP is on at mid Y. CDS WAP is off at end X. CDS WAP is off at end Y.
The 0.03 - 0.1 Hz seismic band has now risen to 10 um/s with the earthquakes. Every chamber except HAM1 now has a watchdog tripped. I'll leave these tripped until the earth settles.
Make that 50 um/s.
Current listed recent earthquakes: 5.5 29km SSE of Chayek, Kyrgyzstan 2015-12-07 08:30:57 UTC 26.1 km deep 4.8 108km W of Murghob, Tajikistan 2015-12-07 08:24:15 UTC 45.2 km deep 5.6 34km NW of Illapel, Chile 2015-12-07 07:51:11 UTC 48.4 km deep 7.2 109km W of Murghob, Tajikistan 2015-12-07 07:50:07 UTC 28.7 km deep
Screenshot of ops overview showing currently tripped watchdogs attached. Screenshot of seismic blrms trends also attached.
Ops Eve Summary: 00:01-08:00UTC (16:00-23:59PT)
State of H1: unlcoked
Incoming Operator: Patrick Thomas
Helpers: Keita, Vern, Mike
Details:
7:00UTC, no locking
I decided to do an Initial alignment and look more closely that usual, and again made it to MICH DARK which isn't locking.
I looked at the BSC2/BS ISI and saw that when MICH DARK is trying to lock, the ISI stage 2 is dark red on the ST2_BLRMS monitors.
Plots attached show MICH DARK trying to lock and not trying to lock.
Maybe this is normal, but lots of shaking is the symptom of the MICH DARK not locking, and ther BLRMS readbacks are showing a lot of shaking in the BSC2/BS ISI.
Trending these channels, they spiked to these values 2 days ago, 12/5, but the level changes I see now are not present in the channels on 12/5.
As a test, I engaged stage 2 isolation, which no change to locking, and I ran INIT on the BSC2 SEI, and also no change to channels behavior.
State of H1: 9+ hours, no locks past DRMI
Current issues:
TITLE: 12/6 DAY Shift: 16:00-00:00UTC (08:00-16:00PDT), all times posted in UTC
STATE of H1: Lock Acquitistion
Incoming Operator: Cheryl
Support: None
Quick Summary:
Eerily similar to my shift yesterday: First half H1 locked, and then 2nd half unlocked. This time there was winds which forced me to not attempt locking. A good note (highlighted in GREEN below) is that I was able to (1) get through an alignment, (2) have decent looking DRMI locking/flashing, & (3) able to lock PRMI (although it wasn't needed since alignment still looked decent). Still NLN elludes me (seems like I've not taken H1 to NLN since early October!!) :(
Shift Log:
Beam Manifold Ion Pump looks like it is railed at 10 at the beginning of the shift.
After the 20:20 lockloss, checked to see if I could get any where in locking, but H1 could not get past FIND_IR (never saw any X-arm locks). Why are X-Arm locks suddenly harder? Is it really due to all this seismic?
The EY BSCISI Location monitor had over 10000nm oscillations. When it died, I tried switching Y-axis to 90mHz (this brought oscillations down, but did not improve anything with locking, so I returned 45mHz Blend).
Started an Initial Alignment. ALS was sort of fine (Y-arm would break lock every few seconds/minutes). INPUT_ALIGN would not lock the X-ARM. At this point, I took locking DOWN to wait out the wind (will watch the End Station drifts on the 0.03-0.1Hz DMT Viewer to see when winds die down).
Ambient emperatures are up and it appears that the LVEA is warming quickly so I have dialed down one heater;
HC 2B has been lowered to 9ma (one stage) from 13ma (2 stages).
John feared an electrical glitch could have knocked H1 here, but his temperature change was around 20:13, a few min before H1 went down.
Winds have started to avg up around 20mph site-wide (gusts on X-arm up to 40mph). Might be dying down?
Range dropped down to 74Mpc with winds.
EY BSCISI Location monitor has had some big oscillations of +/-10,000nm over the last few minutes. SUS EY on the Tidal FOM (nuc1) has some clear sinusoids recently, too.
From 11-11:30amPST, Air Handler MAJOR alarm for LVEA 2B ("as usual"?)
Similarly to yesterday, H1 drops out around lunch time (20:20UTC). Winds were picking up & adding to our noisy useism.
Everything seems back except for HAM2 ISI and HAM3 ISI. These both have guardian user code error messages. This is preventing the IMC from locking. The ISC_LOCK guardian is stuck in the DOWN state waiting for the IMC.