TITLE: 12/01 Day Shift: 16:00-00:00 UTC (08:00-16:00 PST), all times posted in UTC
STATE of H1: Observing at 112Mpc
INCOMING OPERATOR: Patrick
SHIFT SUMMARY: H1 lost lock due to local EQ, relocking had some issues, listed below, currently H1 has been in Observe for almsot an hour.
Relocking/Shift Highlights:
- trouble locking ALS Y
- locked and aligned by starting in LOCKED SLOW NO WFS
- PSL power seems to have dropped, so not giving 2W at low power
- I used the Rotation Statge calibration to get past this at low ppower
- I set the calibration back to it's nominal value before INCREASE POWER
- ALS Y fiber polatrization went bad
- I used the "RESTORE" feature, which brought the polarization down to 16%
- Turned off AC to fiber polarization, later than optimal, though I blelieve no change to H1
- at 00:12:25UTC, while talking to Patrick, I realized that I had left the ALS AC power to adjust the polarization ON, so turned it off
- did not go out of Observe, since H1 is not using ALS at the moment
Relocking LOG:
- Intention Bit: Commissioning (Dec 1 20:31:36 UTC)
- lock loss due to 3.6M EQ about 130 miles from the site
- First Attempt:
- ISC_LOCK state: LOCKING_ARMS_GREEN (Dec 1 20:32:45 UTC)
- waited 5 minutes, then aligned Y arm
- in order to do this, I had to run the ALS-Y Guardian
- this allowed me to get the arm locked, without WFS, in
- LOCKED_SLOW_NO_WFS
- Current time: (Dec 1 21:00:00 UTC)
- ISC_LOCK state: LOCKING_ALS (Dec 1 21:19:06 UTC)
- ISC_LOCK state: FIND_IR (Dec 1 21:20:02 UTC)
- IR was not found (Dec 1 21:20:15 UTC)
- this was due to my setting ALS-Y to Auto
- manually sent to INIT->DOWN
- Second Attempt:
- ISC_LOCK state: LOCKING_ARMS_GREEN (Dec 1 21:21:42 UTC)
- ISC_LOCK state: LOCKING_ALS (Dec 1 21:22:42 UTC)
- ISC_LOCK state: FIND_IR (Dec 1 21:23:37 UTC)
- ISC_LOCK state: CHECK_IR (Dec 1 21:32:34 UTC)
- ISC_LOCK state: ARMS_OFF_RESONANCE (Dec 1 21:32:39 UTC)
- ISC_LOCK state: ALIGN_RECYCLING_MIRRORS (Dec 1 21:32:41 UTC)
- ISC_LOCK state: ACQUIRE_DRMI_1F (Dec 1 21:32:52 UTC)
- ISC_LOCK state: LOCKLOSS (Dec 1 21:35:17 UTC)
- ASC beam on the camera was immediately was oscillating when DRMI locked
- possible FSS issues, but didn't happen again
- Third Attempt:
- ISC_LOCK state: LOCKING_ARMS_GREEN (Dec 1 21:36:25 UTC)
- .
- .
- .
- ISC_LOCK state: CARM_TO_TR (Dec 1 21:46:12 UTC)
- ISC_LOCK state: CARM_150_PICOMETERS (Dec 1 21:46:28 UTC)
- ISC_LOCK state: DARM_TO_RF (Dec 1 21:46:35 UTC)
- DRMI Unlocked (Dec 1 21:46:39 UTC)
- unknown cause for lockloss
- Fourth Attempt:
- ISC_LOCK state: LOCKING_ARMS_GREEN (Dec 1 21:47:46 UTC)
- ISC_LOCK state: LOCKING_ALS (Dec 1 21:48:46 UTC)
- ISC_LOCK state: LOCKLOSS (Dec 1 21:48:55 UTC)
- unknown cause for lockloss
- Fifth Attempt:
- ISC_LOCK state: LOCKING_ARMS_GREEN (Dec 1 21:50:03 UTC)
- ISC_LOCK state: LOCKING_ALS (Dec 1 21:56:15 UTC)
- ISC_LOCK state: LOCKLOSS (Dec 1 21:56:57 UTC)
- unknown cause for lockloss
- ISC_LOCK state: DOWN (Dec 1 21:56:59 UTC)
- ISC_LOCK state: PREP_FOR_LOCKING (Dec 1 21:57:03 UTC)
- ISC_LOCK state: READY (Dec 1 21:57:59 UTC)
- Current time: (Dec 1 22:00:00 UTC)
- I changed the Rotation Stage calibration to give 2W
- ISC_LOCK state: INIT (Dec 1 22:12:47 UTC)
- ISC_LOCK state: DOWN (Dec 1 22:12:54 UTC)
- ISC_LOCK state: PREP_FOR_LOCKING (Dec 1 22:13:15 UTC)
- ISC_LOCK state: READY (Dec 1 22:15:08 UTC)
- Sixth Attempt:
- ISC_LOCK state: LOCKING_ARMS_GREEN (Dec 1 22:15:14 UTC)
- Y arm was well aligned, but would not lock due to fiber pol.
- 22:28 - I turned on the AC power to the polarizer
- I used the RESTORE button, and polarization dropped to 16%
- Y arm immediately lockedc
- .
- .
- .
- ISC_LOCK state: ENGAGE_SOFT_LOOPS (Dec 1 22:48:39 UTC)
- I set Rotation Stage calibration back to nominal
- ISC_LOCK state: MOVE_SPOTS (Dec 1 22:50:32 UTC)
- .
- .
- .
- ISC_LOCK state: NOMINAL_LOW_NOISE (Dec 1 23:06:23 UTC)
- Intention Bit: Observing (Dec 1 23:07:18 UTC)