Reports until 16:13, Wednesday 30 August 2023
H1 ISC
jenne.driggers@LIGO.ORG - posted 16:13, Wednesday 30 August 2023 - last comment - 17:11, Wednesday 06 September 2023(72578)
Updated NonSENS cleaning for LSC, Jitter, and Laser noise (but not in Observe) after h1oaf and h1bos restart

After regenerating the NonSENS c-code and restarting the h1bos and h1oaf models yesterday, I tried some new cleaning during our commissioning time this afternoon.  Now I can get all 3 of LSC, Jitter, and Laser noise subtraction all to work, with no mysterious minus signs needed.

Attached is my DTT 'NonSENS budget' from a time when we were still in commissioning.  The blue is the CALIB_STRAIN_NOLINES channel, and red is CALIB_STRAIN_CLEAN.  The black is the sum of all the other colors' noise estimates.  This LSC subtraction was from a time before the MICH FF was retuned, so it may not have as big an effect were I to turn it on now that MICH FF was updated.

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jenne.driggers@LIGO.ORG - 17:11, Wednesday 06 September 2023 (72722)

Today I turned on the Jitter and Laser noise subtraction during commissioning (without having retrained it), and it performed at a similar level to this plot from last week.  The LSC subtraction was not as effective as this plot, but that's because the LSC in-loop feedforward was tuned later in the week last week, and so there just was less that needed to be subtracted.