camilla.compton@LIGO.ORG - posted 16:58, Thursday 04 November 2021 - last comment - 16:11, Friday 05 November 2021(60538)
TCS CO2 lasers and rings heaters now in more nominal state.
CO2 Lasers: Found that both TCS CO2X and CO2Y laser guardians were attempting to find a lock point - impossible as the lasers are powered off. This has been the case since our March commissioning period. I took these guardians to DOWN.
Maybe we need to change the guardians to go to DOWN if the lasers are off? Or update safe.snaps?
Ring heaters - ITMX and ITMY RHs have been requested to 0W since Feb 2021.
ETMX and ETMY have been requested at 0.45W and 0.42W. ETMX measured 0.44W. ETMY hasn’t actually been heating as measured power is 0W since 19th October 2021. Maybe the EY RH HV is off?
I have turned all ring heater powers to zero and placed all guardians in the NOMINAL state, previously in FILTER_RH_INPUT. Used Jeff K’s instructions here alog 50777 . I will check SDF status tomorrow.
Updated SDF safe.snaps for RH powers. They should be updated when we are locking the IFO again.
Updated safe.snap ITMY SLEDSETCURRENT which was missed in SLED swap (alog 58074). Observe.snap should be updated for this too when screen works*.
*Currently having sdf screen difficulties: cannot open GRD > SDF OPVERVIEW > {model} > SDF RESTORE SCREEN > ! SELECT REQUEST FILE. Command "/opt/rtcds/lho/h1/scripts/fe_load_burt -s LHO -i h1 -d 1026 h1syscstcssdf &". Jonathon found a rcg error and will get it fixed, thank you! Tagging CDS.