Reports until 16:23, Friday 23 August 2019
H1 OpsInfo
sheila.dwyer@LIGO.ORG - posted 16:23, Friday 23 August 2019 (51474)
moving AS36 offset ramp off

Patrick, Jeff K, Sheila

After the lockloss this afternoon Patrick had two locklosses in a row in the state PREP_ASC_FOR_FULL_IFO.  (1250631114 and 1250630221).  The only thing that really was changing about the IFO state in PREP_ASC was that we were turning off the offsets in AS36 that are set after the DRMI ASC is run (with BS controlled by AS45) before we change to the AS36 sensors.  These offsets were particularly large today. 

After a seemingly unrelated lockloss at DHARD, we ran PREP_ASC manually leaving the offsets on, and manually turned them off after ENGAGE_ASC, which did make the POP18 + POP90 build ups worse but we were able to survive. 

I've now moved the ramping off of these offsets toward the end of ENGAGE_ASC, so I am hoping that we can see fewer of these locklosses in PREP_ASC.