TITLE: 07/31 Eve Shift: 23:00-07:00 UTC (16:00-00:00 PST), all times posted in UTC
STATE of H1: Corrective Maintenance
SHIFT SUMMARY: Quiet evening up until a Dolphin glitch caused a lockloss. Dave assisted in CDS recovery then Oli and I recovered the IFO.
- 0550 Lockloss caused by Dolphin glitch: alog 71829
- 0648 CDS recovery complete, starting IFO recovery
- Noticed no light on ALS or AS AIR cameras, decided to revert optics sliders to position of last initial alignment (1374780849)
- Flashes now on cameras, alignment still looks not great
- Tried just aligning ALS using ITMs/ETMs/TMSs and quickly realized that wwasn't working
- Trending other optics to check for movement; saw via oplev that PR3 had moved significantly
- Brought PR3 back (mostly a pitch adjustment); ALS flashes now much better
- Trying manual initial alignment then will see what gives us trouble
- Initial alignment working well up until SRC
- Trending SR3 oplev shows it had moved as well (mostly in yaw)
- Brought SR3 back, SRC was able to lock
- 0846 Initial alignment complete, starting lock acquisition
Handing off fully to Oli for the rest of the night; IFO is currently locking DRMI.
LOG:
No log for this shift.
Detector back to Observing as of 9:52