Reports until 21:00, Wednesday 14 October 2026
H1 General
anthony.sanchez@LIGO.ORG - posted 21:00, Wednesday 14 October 2026 (92312)
Eve Shift report

TITLE: 10/15 Eve Shift: 2330-0500 UTC (1630-2200 PST), all times posted in UTC
STATE of H1: Commissioning
INCOMING OPERATOR: None
SHIFT SUMMARY:

NUC 30 never got re-imaged tonight as people were still actively using it.
 
Locking Notes:
Got up to PREP_ASC_FOR_FULL_IFO[429] @ 00:45 UTC for the first time tonight.
Duration: Stayed there for 14 minutes 48 seconds.  
Violin Damping: Damping On RF actually started 11 minutes into Prep-ASC_4_F-IFO and Damping Lasted 3 minutes. 
Delta PR_GAIN increased by ~0.6 once the damping started. 
Initial mean:46.823
Final mean : 47.59
PopAIR_B_RF18:  changed by -4.4 in the 14 minutes but it was a gradual change and the variabliliy in the signal may exceed this.
Initial: 101.9
Final: 97.51
PopAir_B_RF90 changed by +4.2 in the 14 minutes also gradually with variability in the signal. 
Initial:15.3
Final: 19.4
Lockloss at 00:59 UTC

Next attempt reached Prep ASC @ 1:15 UTC & lasted 5 minutes.
Damping started but lost lock before VIOLIN_DAMPING guardian got out of DAMPING_SETTINGS[3]. 
PR_GAIN: mean increased by ~0.18 in that duration.
Initial Mean: 47.32
Final Mean: 47.53

PopAir_B_RF18: No change 
PopAir_B_RF90 delta : 1.48 
Initial: 19.15
Final: 20.64 
Lockloss @ 1:20 UTC


Next attempt reached Prep ASC @ 1:40 UTC & lasted 6 minutes.
Damping started but lost lock before VIOLIN_DAMPING guardian got out of CLEAR_MONITORS[4]. 
delta PR_GAIN: mean increased by ~0.14 in that duration
Initial:47.25
Final:47.4

Delta PopAir_B_RF18: -3.2
Initial:101.27
Final:97.5

Delta PopAir_B_RF90: +2.1 
Initial: ~15.91  
final: ~18.08

Lockloss @ 1:46 UTC


Next Prep_ASC_For_FULL_IFO @ 158 UTC
Duration: 3 minutes.
No Violin damping.
PR_GAIN DELTA: 0.2
Initial:47.3
Final:47.5

PopAir_B_RF18 delta: no change
PopAir_B_RF90 delta: no change

Lockloss from Prep ASC @ 2:02 UTC

Lockloss from Start_TR_CARM @ 2:25 UTC

Arrived at Prep_ASC_For_FULL_IFO @2:51 UTC
Lockloss from Prep_ASC_For_FULL_IFO @ 2:52 UTC 
 



LOG:

Start Time System Name Location Lazer_Haz Task Time End
22:09 TCS Camilla, Sophie, Miriam, Travis LVEA Y Project CHETA beam onto barrier/wall, Travis Out at 23:46 00:00
23:10 VAC Gerardo, Jordan MidY N CP3 line investigation 23:47