STATE of H1: Calibration
SHIFT SUMMARY: Lots of IFO changes today, locking was a little tricky, we had 2 hours in Observing and now Losuis is taking some Calibration measurements,
LOG:
- Whitening gain on POP45 reduced by 6dB (alog 69350)
- DARM offset increased from 20mA to 40mA (alog 69358)
- SCRL offset changed to -265 (alog 69373)
- MICH and SRCL ASC changes (alog 69372)
LOCK#1
After the IFO was locked 5h13, we lost lock at 01:06UTC from ASC changes.
Elenna loaded a new MICH filter after the lockloss.
LOCK #2
Had a tough time relocking (later we noticed it seemed like CHECK_MICH_FRINGES moved the BS the wrong way at around 2:00UTC). This BS move made the DIFF beat note too low (-30) for LOCKING_ALS. I attempted an initial alignment. Couldn't get XAMR IR locked eso exited from initial alignment. Reverted BS pointing to before CHECK_MICH_FRINGES and touched PRM during ACQUIRE PRMI. Finally locked again. Inputting 76W at 03:45 UTC and at NLN at 04:20UTC. Delay due to OMC_WHITENING limited needed to be changed, alog69371.
Observing at 04:35UTC. SDFs accepted:
- SQZ sdfs screenshot for FC TRAMP, ZM3 offset, FC detuning and PSAMS;
- LSC and ASC sdf screenshot for alog 69373 and 69372;
- OMC and CAL sdf screenshot for 69375 The OMC TRAMP sdf may need to be re-accepted on next lock as it may been from Elenna manually changing Whitening.
At 05:59UTC we had the 10.4Hz PI ring up (PI # 24), I was notified via verbalalarms and it and was successfully damped by the PI_DAMPING guardian, no intervention needed, Vicky's alog 69318 changes were good. See attached plot.
| Start Time | System | Name | Location | Lazer_Haz | Task | Time End |
|---|---|---|---|---|---|---|
| 21:39 | COMM | Jennie.Naoki.Vicky | CR | N |
DARM spring and SCRL offsets, SQZ, FC alignments. |
01:08 |
| 03:22 | SQZ | Naoki | CR | N | Injecting SQZ during locking | 04:22 |
| 6:45 | SQZ | Camilla | CR | N | SQZ angle adjustments | 6:52 |
| 6:55 | CAL | Louis | Remote | N | Calibration | eta 7:30 |
Notes on struggle Austin (69378) and I had for ACQUIRE_XARM_IR (state 11 of ALIGN_IFO) during INITIAL_ALIGNMENT. ALIGN_IFO is checking for LSC-XARM_FM_TRIG_MON to trigger and then it will turn off MCL gain and continue, since Friday evening this has triggered but not hed and ALIGN_IFO hasn't moved forward.
Plot attached comparing on the left a successful Initial alignment 2023/05/05 04:15 UTC verus on the right the failed alignment 2023/05/06 02:00 UTC. Light levels on the H1:ASC-X_TR_A_SUM_OUT16 while unlocked didn't get above their zero values.
Attaching plot for time (2023/05/06 01:43 UTC) that CHECK_MICH_FRINGES reduced DIFF beatnote from -24 to -30. Not sure if this is expected.
