TITLE: 01/17 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 119Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY: Several GRBs, nothing else
LOG:
 

TITLE: 01/16 Eve Shift 00:00 – 08:00 (16:00-00:00), all times posted in UTC

STATE of H1: Observing

INCOMING OPERATOR: Jim

SHIFT SUMMARY: Lost lock early during shift due to EQ, rode out another EQ later. Locked and Observing 4 hours.

LOG: 

02:29 (18:29) Lockloss from EQ in Guatemala. Didn’t hear the warning because Verbal Alarm was muted.

04:07 (20:07) At NLN, going into Observing

05:12 (21:12) Changing ETMY Mode 20 damping gain to 0

Ops Shift Transition: 01/16/2020, Eve Shift 00:00–08:00 (16:00-00:00) - UTC (PT)

State of H1: Locked

Intent Bit: Observing

Weather: 0-5 mph wind

Primary 0.03 – 0.1Hz: 0.01 um/s

Secondary 0.1 – 0.3Hz: 0.2 um/s

Outgoing Operator: Jeff

Quick Summary: Locked and Observing for 20.5 hours. Microseism on the decline.

Forgot to post this last night, the contents are probably not relevant but I'm adding it just in case.

TITLE: 01/15 Eve Shift 00:00 – 08:00 (16:00-00:00), all times posted in UTC

STATE of H1: Observing

INCOMING OPERATOR: Corey

SHIFT SUMMARY: Lockloss early in the shift, followed by some struggling with re-locking due to high microseism. Locked and Observing for 4.5 hours.

LOG: 

01:49 (17:49) Sudden lockloss

03:19 (19:19) At NLN, going into Observing

03:57 (19:57) Changing ETMY 20 damping gain to 0

   All good so far. Environmental conditions are improving as is microseism. Range is 119.0Mpc. 

   Out of Observing for about 1.5 hours for PEM work at End-Y (WP#8513)

   One GRB short alert after End-Y work finished.  

   18:53 (10:53) GRB Alert E360524 - Fermi #60093510 Lat = 20sec, Trigger Dur = 0.016sec

   15 minute stand down until 19:08 (11:08)

   Karen & Vanessa did the quarterly cleaning in the PSL enclosure and Anti-Room. 

Closing FAMIS #13789

  Jason inspected the hoses inside the PSL enclosure. No leaks were observed, however several hoses are showing signs of bulges at the clamps and fittings. See attached pictures. We will refresh the these connections in the near future. 

Closing FAMIS #13089

   Added 100ml water to the Crystal chiller. No water was added to the Diode chiller. No problems were observed with the filters and hoses connections.

Closing FAMIS #10544

TITLE: 01/16 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 117Mpc
INCOMING OPERATOR: Jeff
SHIFT SUMMARY:

H1's been locked over 12.5hrs with decent range even with the high microseism.  

There's also been noticeably less "seismic shelving" and glitches in the 20-50Hz band this evening.

Speaking of microseism, it has been turning around & dropping over the last 8hrs. 
LOG:

• 9:15 "GRB short" alert, conferred with LLO/Virgo operators, confirmed to be short, standing down until 9:30.
  • 11:30 INJ_TRANS back to INJECT_SUCCESS (I forgot to set timer on my phone.)
• 11:58 S200116ah alert received (later retracted, INJ_TRANS restored at 12:18)
• ~14:30 Driving forklift from LSB to fire water tank area (to fuel up big green) [Tyler]
• 15:45 FMCS MY Air Handler alarm (had a similar one yesterday due to Bubba working on increasing the temperature 

Smooth running for H1.  Had a GRB & a (retracted) superevent candidate.  Microseism is possibly begining to inch downward (still in USEISM_WINDY state).

TITLE: 01/16 Owl Shift: 08:00-16:00 UTC (00:00-08:00 PST), all times posted in UTC
STATE of H1: Observing at 114Mpc
OUTGOING OPERATOR: Niko
CURRENT ENVIRONMENT:
    SEI_CONF state: USEISM_WINDY
    Wind: 7mph Gusts, 4mph 5min avg
    Primary useism: 0.04 μm/s
    Secondary useism: 0.96 μm/s 

Microseism is the story with it jumping almost a factor of 3 in the last 14hrs!  (with this SEI_CONF is in USEISM_WINDY).  

There was a light dusting of snow for the drive in (most main roads were clear), and it is a little warmer tonight at 22°F.
QUICK SUMMARY:

H1's been locked almost 4hrs and even with the high useism, we are surprisingly not glitchy (no "seismic shelving") on DMT Omega---perhaps give thanks to not having the double whammy including high winds.  Here's to a nice night of triple coincidence!

Accepted the following sdf diffs to go into Observe. They're all quite small, and this is a known problem (to Jeff at least).

A few weeks ago I created a cron job for the lockloss summary code so that it runs Monday at 8 am every week. The plots are made for locklosses over the past week, the past month, and the O3 run. They exist at:

https://ldas-jobs.ligo-wa.caltech.edu/~yannick.lecoeuche/events/summary_plots/

There is a README.txt file that explains a bit about each plot and how it should be interpreted.

Unlike Alcatraz, you can escape Increase_Flashes. I added some code and made sure that it worked so if it is absolutely necessary, that exiting I.F. will restore anything on its way out of the state (ie. if you request a new state from one of the ALS ARM nodes, it will "gracefully" go there).

I also made it a protected state (redirect = False) to help avoid unecessary escapes from this state.

Users should still follow the usual rules for intervention.

Kyle noted some minor changes on the beam tube pressure at Y-Mid, upon closer inspection it was determined that today's VEA temperature increase caused the discrepancy.

Something to note, gate valve annulus ion pump controllers will rail and cause alarms at 10 mA, plot shows GV11 AIP system going up to 7.7 mA from 0.43 mA, with a glitch up to 8.40 mA.

We've noticed a peculiar behaviour on CP4 dewar level percent, the dewar is empty but the readback channel continued to read some level NOT = 0, some time ago we changed the level alarms to fix the channel from going yellow (alarm level).  Today the decision was to do a different fix, the equalizer valve at the instrument manifold was open a couple of turns (valve was closed), that makes the readback lines cancel each other out, thus making the dewar level percent for CP4 close to 0.

Alarm settings for CP4 dewar level percent have been reverted back to nominal numbers.

I identified an issue with the Pcal boards, and needed to find out what the impact is.

I modeled the boards with a photo diode in SPICE to see look at the frequency response of the output voltage. The issue with having the wrong capacitor manifests itself as rather intense gain peaking at around 1 MHz, and various instruments that Pcal oversees have different versions of the board which are all impacted differently.

Of concern to LIGO is how bad is this <5 kHz?

Well, with the current capacitor (in this 2_7_pf.png attachment) you see the response 5 kHz is roughly 8 * 10^-4 % higher.

With a replaced capacitor (in this 5_0_pf.png attachment) you see the response 5 kHz is roughly 4 * 10^-4 % higher.

Moral of the story: since Pcal isn't used above this kind of frequency, there is no need to worry about this issue since the error is miniscule in these frequencies.