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Virgo Runs (O4b)
amagazzu - 23:02 Monday 07 October 2024 (65275) Print this report
Operator Report - Afternoon shift

ITF found in LOW_NOISE_3_SQZ and in Science Mode. At 15:30 UTC I set the ITF In commissioning Mode to perform the planned measurements:
15:32 UTC - ENV injections, concluded at 16:14 UTC;
16:16 UTC - INJ Injections (inject_asc_test.py), concluded at 16:36 UTC;
16:38 UTC - Measurement of checkHrec, NE,WE,BS,PR,SR optical responses, and sensitivity, concluded at 17:33 UTC;
17:34 UTC - Measurement of actuators response for NE,WE actuators and NI,WI,BS marionnettes ​​​​​, concluded at 18:11 UTC;

ITF back in Science Mode at 18:39 UTC. It unlocked at 20:23 UTC, relock in progress.

Sub-system reports

DAQ
This afternoon, at around 20:40 UTC, I went to the DAQ room to replace the Tranceiver of the MUX/DEMUX 12 Slot 10 to try to restore the INJ missing data. Unfortunately even after it was replaced with a spare it showed the same behavior (no blinking LEDs). Expert informed of the issue.

SBE
At around 15:05 UTC the vertical loop of SQB2 opened, triggering a strong oscillation on the related LC_TY.
From 18:12 UTC to 18:39 UTC I acted on SQB2 Motor3 to return LC_Y close to its setpoint. Position loop closed at 18:36 UTC, the horizontal loop opened soon after (as it was previously during the last weeks) while the vertical loop remain closed. At 18:38 UTC I also opened and closed the Angular loop to stop the oscillation of LC_TY.

Images attached to this report
Comments to this report:
masserot - 4:34 Tuesday 08 October 2024 (65277) Print this report

DAQ

A Tolm link has two parts, ie the DBOX_SN123_LK0 and the MxDx_SN12_LK10.

The trial made yesterday evening at the MxDx_SN12_LK10 indicated that the issue is probably at the transceiver of the DBOX_SN123 side. But if we are un-lucky the 2 tranceivers are deads .

The trial has to be make at both side of a Tolm link.

masserot - 8:55 Tuesday 08 October 2024 (65279) Print this report

Francesco  Berni changed the 2 optical transceivers. After this operation, the channels coming from the DBOX123 were well received without any re-configuration actions

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