IFO STATUS: UNLOCKED
Sudden Lockloss for an Unknown reason 34 minutes into lock:
https://ldas-jobs.ligo-wa.caltech.edu/~lockloss/index.cgi?event=1369731497
Tried to relock right after the lockloss and has a lockloss at LOCKING ALS
I'm having troubles getting through Align_IFO's INPUT_ALIGN_OFFLOADED because the IMC is losing lock during the process.
I'm now going to try pausing both INIT_ALIGN and ALIGN_IFO until the IMC is locked again.
Seems like the IMC is taking a while to get Locked.
Started troubleshooting Init_Align:
https://cdswiki.ligo-wa.caltech.edu/wiki/Troubleshooting%20the%20IFO#Initial_Alignment_Troubleshooting
Got to the diagnosing IMC Locking Issues.
https://cdswiki.ligo-wa.caltech.edu/wiki/Diagnosing%20IMC%20locking%20issues
DiagMain has a message PSL_ISS: Diffracted power is high.
Searched for an Alog about this message.
Trending these channels: I noticed that these signals
H1:PSL-ISS_DIFFRACTION_MIN H1:PSL-ISS_DIFFRACTION_AVG H1:PSL-ISS_DIFFRACTION_MAX
Using alog 58264 as a reference I followed the instructions for adjusting the diffraction power.
H1:PSL-ISS_REFSIGNAL current value: -1.99 -> back to -1.99
H1:PSL-ISSSECONDLOOP_AC_COUPLING_OFFSET Current Value 0.050 -> back to 0.050
command for the ndscopes I was using to determine if my changes are actually doing anything at all:
ndscope H1:PSL-ISS_SECONDLOOP_AC_COUPLING_OFFSET H1:PSL-ISS_DIFFRACTION_AVG H1:PSL-ISS_SECONDLOOP_ENABLE_MON H1:PSL-ISS_REFSIGNAL H1:IMC-PWR_IN_OUT16 -k
It seems like no matter what I do with the REFSIGNAL there is not a responce on the Diffaction AVG even if I change the AC Coupling Offset.
H1:PSL-ISS_SECONDLOOP_CLOSED and Cylced this on and off.
IMC can lock when ISC goes into Prep for locking. But still has a PSL-ISS: Diffraction Power too High error message. And IMC is still unlocking during Initial Alignment.