The following report has been submitted to the On-call interface.
On-call events -> Interferometer Sensing & Control
Title: ALS warm realignement
Author(s): gosselin
| Called at: 23:15, 01-07-2025, by: Montanari |
| Remote intervention: Started: 23:15, 01-07-2025; Ended: 00:30, 02-07-2025 |
| On-site intervention: Started: ; Ended: |
| Status: Resolved |
| Operator when issue resolved: Montanari |
Details:
I have been called by Beatrice because there were some trouble to go through the lock acquisition. The West arm was unlocking.
I checked and see that there was some power missing on the signal WARM_BEAT_DC.
I first try to realign the beam in transmission, ie into the fiber on EIB but the improvement was very little.
I then reliagned the beam in the arm with the galvo on SWEB. I slightly changed the set points of the tilt X and tilt Y and recover a much greater signal in transmission.
The lock acquisition went through the green lock but eventually unlocked at CARM NULL 1F.
* Note that any files attached to this report are available in the On-call interface.
