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Virgo Runs (O4b)
Montanari - 7:03 Saturday 03 August 2024 (64849) Print this report
Operator Report - Night shift

ITF found in Science, BNS Range ~50Mpc

  • 23:02UTC, ITF unlocked due to an Earthquake in Phlippines after some drops in BNS Range from 22:51UTC. Visible effects on suspension until 00:00UTC
  • 23:05UTC, reload and enable Etalon loop
  • During lock acquisition, NE Top Stage, WE F7, WE Top Stage, SNEB and SWEB Position Loops opened by the guardians.
    Closed all properly
  • During lock acquisition, several unlocks occurred for no obvious reasons in CARM_NULL_3F state or after reaching CARM_NULL_1F.
    Only three times seem to be due to the same causes of yesterday afternoon, too much power on B1s (01:48UTC, 02:15UTC and 03:26UTC).

After last unlock due to power on B1s, I put ITF in CARM_NULL_1F
Status reached at 03:38UTC

ALS
From 01:00UTC and 01:25UTC difficult to lock arms on green beam. Issue solved itself

Guard Tours (UTC)
21:11 - 21:40
23:02 - 23:31
01:01 - 01:31
03:01 - 03:32

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