craig.cahillane@LIGO.ORG - posted 03:58, Sunday 04 November 2018 - last comment - 10:26, Sunday 04 November 2018(45000)
Injections Tonight
Frequency noise injections Into CARM Servo Board EXC A via LSC-EXTRA_AO_2_EXC (Pic 1)Inj Amp Start Time End Time ------------------------------------- 1e-2 1225337909 1225338605 3e-2 1225338652 1225340457 3e-3 1225340607 1225341956 1e-3 1225341989 1225344477Intensity noise injections Into PSL-ISS_SECONDLOOP_EXCITATION_EXC with the low pass disengagedInj Amp Start Time End Time ------------------------------------- 1e3 1225346150 1225347492 3e3 1225347687 1225348986 1e4 1225349022 1225350095 3e2 1225350140 1225351784 1e2 1225351821 1225353267MICH Feedforward I changed the actuators for the MICH FF to DARM measurements from the ITMs to the ETMs per Sheila's suggestion. I did not have permissions to write to/opt/rtcds/userapps/release/lsc/h1/templates/, so I created two new templates in/opt/rtcds/userapps/release/lsc/h1/scripts/feedforward. Have not had a chance to fit the MICH FF because I unlocked the IFO during the test. That is the only reason we lost lock this evening, had 13 straight hours of IFO time. I also altered ALS guardian so that X arm green WFS don't come on. Mediocre alignment makes the WFS cause locklosses during LOCKING_ALS.
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I forgot to log this yesterday, but I noticed that the X arm WFS have been set to off using the gain slider, so that they have not been on during initial alignment unless someone notices and turns them on. This is probably the reason why we ended up with bad alignments after several inital alignment attempts during the day Friday, so I added a line that turns the WFS gain on in the ENABLE_WFS state.
I think that we should still be able to turn off the X arm WFS by hand if needed. It is likely that turning the X arm WFS off in the guardian is also turning off the Y arm WFS, which do work. We should look into why the X arm WFS don't work anymore.