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Virgo Runs (O4b)
menzione - 6:56 Friday 12 April 2024 (63938) Print this report
Operator Report - Night shift

Upon arrival I found ITF relocking. The B1p spot was miscentered respect to the camera, so I moved with the fixed setpoint up to CARM_MC_IR, then I engaged again the floating setpoint.
ITF reached LN3_SQZ but at 22:00 UTC we discovered a problem with TCS_WI_CO2_PWROUT. I contacted TCS expert who fixed the problem (ADJUSTING MODE set).
After a couple of locking attempts ITF locked again in a stable way.
SCIENCE_MODE set at 23:37 UTC.
ITF unlocked 3 times during ACQUIRE_LN1 (TBC) so I decided to wait a bit in DC_READOUT. LN3_SQZ acheived at 04:30 UTC.
SCIENCE_MODE set at 04:31 UTC.

Guard Tours (UTC time)
21:06 - 21:35
23:01 - 23:29
01:02 - 01:31
03:02 - 03:31

Sub-system reports

DAQ
NewtonNoise
02"15 UTC - NNC_CEB_LEV2 process crashed. I tried to restart it via VPM without success:
Log: 
FATAL..-Device V1:NN_CEB_INF_Z_209> No response after IP configuration
WARNING-Device V1:NN_CEB_ACC_Z_226> Writing invalid data with comment INFO_ZEROS, INFO_DATA_INVALID, INNO_DATA_TOO_SHORT, INNO_DATA_LENGTH, SERVICE_TIME_INTERVAL_HIGH, SERVICE_TIME_INTERVAL_SKIPPED, SERVICE_DATA_NO_REQ_LAST_SEC, SERVICE_DATA_OVERWRITTEN, 
WARNING-Device V1:NN_CEB_ACC_Z_217> Writing valid data with comment SERVICE_TIME_INTERVAL_HIGH, SERVICE_TIME_INTERVAL_SKIPPED, SERVICE_DATA_NO_REQ_LAST_SEC, SERVICE_DATA_OVERWRITTEN, 

Oncall events

TCS
(11-04-2024 21:55 - 11-04-2024 22:20) From remote
Status: Ended
Description: Power_DAS_OUT_is_out_of_range
TCS_WI_CO2_PWROUT at 3.6

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Comments to this report:
ruggi - 9:39 Friday 12 April 2024 (63941) Print this report

The lock acquisition failures in fact happened around the transition to LN1, but the transition itself was fine, with no 1.8 Hz oscillation or other evident issue. The spikes visible in the corrections are normal: they are due to NI/WI relays switch.

he third unlock occurred before the transition.

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