Virgo Logbook

Reports 1-1 of 1

Detector Operation (Operations Report)

zaza - 16:28 Wednesday 31 December 2025 (68436)

Operator Report - Daily shift

ITF DOWN in UPGRADING
Activities carried out this morning:

Check of EER temperature: eurotherm sensor read 19.4 °C, ENV_EER_TE 16.8 °C. Room conditions were fine, ENV experts were notified (Andreazzoli, Tringali)
TCS chillers water levels check (Ciardelli)
SR RH was switched on and switched back off (68434 Nardecchia)
TCS Aux Lasers cooling tank filter maintenance (68435 Ciardelli, Zaza, Nardecchia)
SR tower pumping in progress (Vacuum team)

At around 13:30 UTC, INJ unlocked and EIB started oscillating. No seismic activity. I contacted INJ experts, relock in progress (Spinicelli).

Images attached to this report

68436_1767194864_Screenshot 2025-12-31 at 16-27-31 DMS Event Monitor.png

68436_1767194864_Screenshot 2025-12-31 at 16-27-09 Plots for logbook report.png

Comments to this report:

spinicelli - 16:41 Friday 02 January 2026 (68438)

Between Wednesday afternoon and Thursday morning, EIB started to oscillate several times, probably due to sismic activity, causing the BPC loop to open suddenly. As a consequence, BPC corrections went away and I had to recover them manually once the bench calmed down.

Moreover, after the last BPC opening, Narm couldn't relock by itself. PR mirror has been moved transversally to recover the arm lock. Finally I brought back the PR in its last position.