ITF found relocking at LOCKED_ARMS_BEAT_DRMI_1F in PREPARE_SCIENCE (Autoscience ON). Achieved LN3 at 05:36UTC.
Almost immediately unlocked at 05:43UTC (pdf 1) due to BS glitch with ITF_LOCK request=LOCKED_PRWI, as has been the case for the 3 most recent unlocks (fig.1).
Automation stuck in LOCKING_ARMS_BEAT_DRMI_1F, fixed by performing cross-alignment in ACQUIRE_DRMI with Operator-in-trainining Zaza (SR_TY was misaligned by 12 urad).
Lock recovered at 07:14UTC, back in SCIENCE.
ITF set to DOWN in TROUBLESHOOTING mode at 09:50UTC to allow for CEB interventions:
- 09:55-10:51UTC swap of DSP card in BS rack, substitution of fan filters, resync of Timing_dsp by Boschi and Piendibene
- 10:00-10:20UTC inventory work in cabling lab by Dattilo.
Lock recovery after BS intervention (UTC):
- 10:53 Closed SPRB_SBE position loop
- 11:02 Realigned NE cavity for ARMS_LOCK on IR.
- 11:15 usual cross-alignment in ACQUIRE_DRMI. SUS_PR node stuck while MISALIGNING. Only fixed by restarting ITF_LOCK at 11:40UTC.
- 11:48 Unlock due to RFC unlock during second attempt at DRMI alignment.
- 12:12 Succesful cross-alignment in ACQUIRE_DRMI by Zaza, Bersanetti.
- 12:56 Relocked in LN3, back in SCIENCE with Autoscience ON.
ITF unlocked almost immediately again at 13:04UTC.
Sub-system reportsISC
07:24UTC Violin modes excited for a few minutes, see DMS flag in fig. 2
SQZ
10:22UTC Intervention on VAC system by Vardaro