1510 - 1540 hrs. local -> Back and forth to/from Y-mid. Took ~20 minutes with LLCV bypass valve open 3/4 turn Next manual overfill scheduled for Tuesday, Jan. 19 th before 4:00 pm
We have been locked for more than 12 hours durring a time of unusally high microseism for Hanford. We have had elevated ground motion in the EQ band (0.03-0.1 Hz) which Robert thinks is due to a storm off of Greenland which has been slowly dropping off over the last 24 hours, but is still at 0.1 um/sec. We also have a storm in the Pacific and the corner station Z axis is reaching 2um/second in the useism band (0.1-0.3 Hz).
We have what seems to be a scattering shelf in DARM reaching up to just above 10 Hz, when the 0.1-0.3 Hz band is especially bad. The attached screenshot shows two particularly bad examples one at 22:54 UTC and one at 22:47:15
model restarts logged for Sat 16/Jan/2016 No restarts reported.
TITLE: 1/16 EVE Shift: 00:00-8:00UTC (16:00-00:00PDT), all times posted in UTC
STATE of H1: Observing at 80 Mpc
Incoming Operator:
Support: Evan
Summary:
Adam called off hardware injection due to LLO being DOWN. Robert couldn't get to the mid stations so he did injection on BS BSC for the up-conversion study. The ratty looking POP_A_LF was likely due to high seismic activity but the low output was due to TMSY was kicked by couple of micron during the last lockloss and slowly drifted since this lock was acquired.
Shift Activities:
01:45 Briefly out of Observing to stop the Hardware injection.
01:55 Robert to LVEA. Switched to Commissioning.
03:57 Touched TMSY to increase arm output power. Gained ~10 Mpc back in the BNS range.
04:29 Robert done. Back to Observing
My shift is *kind of* over but I have things to do so I will stick around probably close to midnight. Call control room if anyone need anything.
TITLE: 1/16 DAY Shift: 16:00-00:00UTC (08:00-04:00PDT), all times posted in UTC
STATE of H1: Observing with Injections.
Incoming Operator: Nutsinee
Support: Sheila
Quick Summary:
PEM Injections at the beginning of the shift & then a good 3.5hrs devoted to recovering from a lockloss.
Shift Activities:
So after the long overnight-lock, H1 dropped out of lock mid-shift (Robert was at EY, but we were running ragged for the last few hours with fairly high low-frequency seismic motion).
Note:
There were a few new tricks which Sheila taught me when we were working on locking H1 in these noisy conditions:
1) When the ALSy was having trouble locking, we did a Clear History (yellow button on the ALS screen). This then gave us a very misaligned Y-arm (but this was taken care of fairly easily by adjusting only yaw on only ETMy).
2) While waiting for PRMI, POP 18 & 90 looked pretty bad. So, while in this state, the PRM was misaligned and then we adjusted the BS by eye while looking at ASAIR video.
These were two new tricks which I was not aware of.
I just wanted to mention that the 'odd' behaviour in the 0.03-0.1 Hz band (EQ band) was caused by the larger than usual primary microseismic motion, which is peaked at 60-70 mHz (seen in the spectra) . This is usually small at Hanford and large at Livingston, which is the reason their EQ band rms is always larger. In the presence of a lagre primary microseism, the 90 mHz blend will almost certainly give worse performance due to it's gain peaking near 90 mHz.
So, in addition to wind and the secondary microseism, also watch out for the primary microseism :)
TITLE: 1/16 Eve Shift: 00:00-08:00UTC (16:00-00:00 PDT), all times posted in UTC"
STATE Of H1: Observing + Hardware injection on going
OUTGOING OPERATOR: Corey
QUICK SUMMARY: POP_A_LF seems lower than usual and ratty. High Useism (above 90th percentile) and earthquake band. Big tidal fluctuations. Hardware injection has been scheduled to end at 6pm.
As POP_A_LF continued to drop, Evan suggested I touch TMSY. I trended TMSY back to 2 hours before it lost lock and adjusted pitch and yaw accordingly. It worked awesomely. I already checked with Robert to make sure this doesn't affect him.
I've schedule more burst injections and CBC injections, these will begin at 20:00 PT (00:00 UTC). The last one will be at 21:40 PT (01:40 UTC). Here is the updated schedule: 1137024017 2 1.0 burst_GPS_76.259_ 1137025217 2 1.0 burst_GPS_76.262_ 1137026417 2 1.0 burst_GPS_76.263_ 1137027617 2 1.0 burst_GPS_76.264_ 1137028817 2 1.0 burst_GPS_76.266_ 1137030017 1 1.0 coherentbns1_1135135335_
FYI: I restarted the LDAS/DCS Disk2Disk script that copies raw data from the framewriter disks into the LDAS archive this morning, Jan. 16, at 10:04 am PST.
model restarts logged for Fri 15/Jan/2016
No restarts reported. h1tw0 continues to be down waiting h/w repair.
Slushy snowy morning here on site with useism slightly trending up (above 90 percentile at 0.7um/s), and the EQ band actually has been trending up slowly over the last 12 hrs from ~0.05 up to 0.2um/s. Winds are under 10mph.
H1 has been in Observing as TJ left it and it has been locked for 16hrs (for most of the night the range was hovering just under 80Mpc. Now it has been around 75Mpc for the last 2 hrs. On DARM, I can clearly see elevated noise in the 20-30Hz band, a line around 42Hz & also noise in between. POP A on the PRMI striptool & tidal channels on their striptool show oscillations at ~0.4Hz.
I believe I see Robert pulling onto site (as I was chatting with Landry).
I've tried contacting LLO Control Room (TeamSpeak & phone), but perhaps someone has just stepped out of the CR (According to their Summary Page, they someone has been working on bringing L1 up). Will touch base with them when they are available to coordinate double coincidence for a suite of hardware injections. In the meantime, Robert will be taking H1 for PEM injections soon. Robert has said that he can "stand down at any time to allow hardware injection work". Robert will be heading to an End Station for his PEM work.
Terramon after-the-fact notified us that there was a 4.9 Costa Rica quake at 17:23 with motion of 0.38um/s.
h1tw0 continues to be down (also causing a red EDCU)...not sure whether I need to keep reporting this. This comes up when operators run through the shift check sheet.
TITLE: 1/15 Eve Shift: 00:00-08:00UTC (16:00-00:00 PDT), all times posted in UTC"
STATE Of H1: Observing at 78Mpc for 7hrs
SHIFT SUMMARY: Had one small lockloss but it came right up.
INCOMING OPERATOR: none
ACTIVITY LOG:
In full lock (with the POP beam diverter open), I rephased POPAIR9 so that the appearance of PRCL is maximized in I, and I rephased POPAIR45 so that SRCL is maximized in I (same strategy as was done for POP).
The changes are as follows:
I don't think POPAIR is used for any LSC at any point during locking or initial alignment, so there should be no issue here.
Then I left the beam diverter open and redid the LSC sensing matrix measurement. Times as follows (2015-01-16 Z):
I then left the beam diverter open and collected quiet data from 02:43:30 to 03:32:30. Kiwamu and I had discussed the possibility of cross-correlating the POP and POPAIR PDs in order to look for correlated vertex LSC noise below the PD shot noises (à la the usual DCPD technique for DARM). In the case of POP45Q (attached), the cross-correlation seems to show correlated noise out to high frequencies, at a level of a few below the POPAIR45Q shot noise.
Done with calibration for the day, but it will resume again in the morning.
Sheila, Jenne, Evan
We had another instance of the integrated ALS tidal offsets causing the IMC-F offloading to bump up against the rail.
We weren't sure how to turn on the bleed feature of the ALS filters, so we instead doubled the digital limiter on the COMM control filters.
I've schedule another 2 runs of the long burst injections and a CBC BNS injection for tonight. These will start at 20:10 CT (6:10 UTC), there are 5 burst injections and 1 CBC injection, meaning that the last one wil be at 23:50 CT (9:50 UTC). Here is the updated schedule: 1136952617 2 1.0 burst_GPS_76.259_ 1136953817 2 1.0 burst_GPS_76.262_ 1136955017 2 1.0 burst_GPS_76.263_ 1136956217 2 1.0 burst_GPS_76.264_ 1136957417 2 1.0 burst_GPS_76.266_ 1136958617 1 1.0 coherentbns1_1135135335_ 1136959817 2 1.0 burst_GPS_76.259_ 1136961017 2 1.0 burst_GPS_76.262_ 1136962217 2 1.0 burst_GPS_76.263_ 1136963417 2 1.0 burst_GPS_76.264_ 1136964617 2 1.0 burst_GPS_76.266_ 1136965817 1 1.0 coherentbns1_1135135335_
Nominal Low Noise 01:10
While relocking, the OMC_LOCK Guardian reported a "Wrong mode?" notification just before DC_READOUT. The OMC Trans camera looked great, so I wasn't sure of the issue. I looked through the code and H1:OMC-DCPD_SUM_OUTPUT needs to be > 14 for it to move on. This channel was around 13.0 +/-0.5. Jenne thought that the PSL power was slightly low, and suggested that I use the rotation stage to bump it up a few tenths of a W. Evan also gave his nod of agreement and I changed the rotation stage from a request of 2.000W to 2.100W. Nothing. Then from 2.100W to 2.400W. Success!
While I was adjusting this, Jenne was inputing the PSL power into a small box on the LSC_OVERVIEW (shot attached). The Guardian will normally write to this value, but since we were changing it, it needed to be updated. So for future attempts at this, make sure to be changing the value in that box as the PSL power changes to keep everything happy.
Robert was running inj at the time, but I'm not sure if that was it or not. Still investigating.
Attaching the generic lockloss plot. Nothing evident here.
ISI BS St1 and St2 WD tripped during the lockloss, so I have also attached the ACT plot. Robert was inj on ISI BS at the time so I suspect it was this inj that caused the lockloss.
