Reports until 08:13, Saturday 03 October 2015
LHO General
corey.gray@LIGO.ORG - posted 08:13, Saturday 03 October 2015 - last comment - 08:45, Saturday 03 October 2015(22200)
Transition to DAY Shift Update

TITLE:  10/3 DAY Shift:  15:00-23:00UTC (00:00-8:00PDT), all times posted in UTC     

STATE of H1:  Guardian in DOWN state

Outgoing Operator:  Empty Control Room (Jim was in for part of the OWL shift, but the shift was pseudo-called-off due to H1 issues)

Support:  None

Quick Summary:  The GWI.stat page says H1 has been in the "NOT OK" state for the last 19+hrs.  Will catch up on alog, see if there's anything I can do, and wait for assistance/input.

Comments related to this report
corey.gray@LIGO.ORG - 08:45, Saturday 03 October 2015 (22202)
Link

A Little More:

Mike Called, and then I chatted with Daniel & then Sheila called.  More items worth noting:

Seismic:  Winds are below 10mph.  useism (0.1-0.3Hz) has perhaps drifted a little down in the last 12 hrs.  The signal is still in the high-ish range and is mostly in the middle of the dashed lines (90th & 50th percentile states).  So we still have useism which is higher than normal & according to Sheila we've not locked much with useism this high (NOT to say this is the reason for locking issues, but just something to NOTE).

Laundry List:  (Daniel plans to be in around 10am.  He listed a few items which he'd like to us to pursue.  Sheila mentioned issues she noticed last night (i.e. BS oplev glitching and ALS glitching).  She said they are bad, but probably not the reason for the Locking issues with H1.

  • Run Initial Alignment and return to try locking
  • DRMI, can we lock it alright (we did last night)
  • Revisit/investigate Suspensions (starting with end stations).  Try pushing on Suspension and see if we can see this with OSEMs/oplevs
  • Do we have Standard Spectra for each subsystem?  If we did, one could go through and make cursory checks for anything obviously bad.  If we don't have them, we should work on generating these (atleast for unlocked states).
  • Something uncontrolled?  Is there a fuse blown?  How would one diagnose this?
  • Oplevs.  Compare spectra with other unlocked stretches in the past.

Observatory Mode:  This has been in the "Lock Acquisition" state all night, but we were in the DOWN state.  I would not know what we would call last night.  A "Broken" state would be nice.  Using "Other", "Unavoidable", or "Unknown" are the only other states which I would use to describe our current state, but they don't offer any information & are too similar to each other.

OK, onto an alignment!