Virgo Logbook

Virgo Runs (O4b)

gherardini - 14:59 Monday 16 December 2024 (65813)

Operator Report - Morning shift

This morning the ITF unlocked from science at 7:06UTC, the following LOW_NOISE_3 locks lasted only few minutes with the longer science mode of about 18 minutes, the lock acquisition worked fine the ITF relocked each time at the first attempt , Manuel worked to understand the problem, in the last lock which is still ongoing he disabled the BS and PR ID reallocation.

Sub-system reports

SBE
at 8:49UTC the SPRB position loop was opened by the guardian, controls properly closed.
recovery of SQB1 vertical correction with F0 step motors from 9:40UTC to 9:35UTC.

Images attached to this report

65813_1734357580_Screenshot 2024-12-16 at 14-57-38 DMS Event Monitor.png

65813_1734357585_Screenshot 2024-12-16 at 14-59-06 Plots for logbook report.png

Comments to this report:

Paoletti, Fiori, Tringali - 15:36 Monday 16 December 2024 (65818)

Maybe it is a coincidence, but today there was an excavator that started working near the CEB, right at the beginning of the tunnel, moving towards West.

Images attached to this comment

pinto - 16:37 Monday 16 December 2024 (65819)

Given the time coincidence of the excavator moving near the central building there's a possibility of correlation with the unlocks/ mulfonctioning of the reallocation strategy at the central suspensions.

The reallocation engagement will be enabled if at the next unlock it will be reloaded ITF_LOCK metatron node.