TITLE: 02/21 Day Shift: 1530-0030 UTC (0730-1630 PST), all times posted in UTC
STATE of H1: Observing at 155Mpc
INCOMING OPERATOR: Tony
SHIFT SUMMARY:
- H1 Glitches continues as noted by Sheila here.
- Ring Heater was adjusted to address the new PI24 issues (as well as the glitches above). Because this is a slow aligment change, we may have to run Initial Alignments after locklosses for the next few days.
- Finally, there is the ITMy Mode 5 & 6 which are rung up and Rahul has been finding the best settings to damp it down. Don't have anything ready to update lsc_params with yet, but until we do, this is the current preferred settings (alog) for ITMy Mode 5: FM6 + FM8 + FM10 Gain +0.01 (+30deg phase) <----this needs to be entered by hand!
LOG:
- 1719-1750 Dust Mon FAMIS checks (mitch)
- 1754, 1813 PI 24 ring-up
- Around this time we begin to see the range drop and glitchiness again.
- 1756 Rahul taking a look at ITMy violin modes
- 1829-1851 Optics Lab cleaning (kim)
- 1816 PI24 takes us out of OBSERVING as H1 is very glitchy and overall range takes a step down
- 1829 LOCKLOSS (after 4.5hr lock)
- 1835 INITIAL ALIGNMENT (green arms didn't look great/stable)
- Sheila made a Ring Heater change to address PI24 (& hopefully our new H1 glitches as well).
- OPS NOTE: This will take a couple days to "normalize", so Alignments may be needed after every lockloss until H1 stabilizes from this change.
- For DRMI, it was taking a while to lock, so went for a PRMI which took about 5-min to lock, and then after this DRMI was able to finally lock within a min.
- 1958 NLN....2002 OBSERVING
- 2127 Lockloss due to M5.1and sounds north of Vancouver, BC
- Taking H1 to IDLE to wait out the rumbling for 30min first.
- 2142 Initial Alignment
- 2247 back to NLN & 2250 back to OBSERVING