J. Kissel

Executive Summary: Took SUS OFI health-check transfer functions. Looks good. H1SUSOFI is GO FOR DOORS.

Here're the results of pre-doors health check of the suspended dynamics and OSEM electronics after we've swapped the KTP crystal (LHO:79344) and Fused-Silica Wedge (LHO:79363) to repair the OFI. Note, this is also after the SD OSEM was pulled and replaced (see LHO:79387). 

Attached are 
    - the individually processed full DOF to DOF plots -- 2024-08-01_1741_H1SUSOFI_M1_ALL_TFs.pdf
    - the comparison between the most-recent pre-vent data from LHO:79198 -- allofiss_2024-08-01_H1SUSOFI_Phase3a_PreDoorsCloseout_ALL_ZOOMED_TFs.pdf

The OFI suspension and electronics look healthy, with a similar frequency response to the 2024-07-17 data with the expected lower coherence that one gets in air with purge running. 

ISI was floating and damped during this measurement. Digital request of coil driver state was 2, matching the analog electronics (a HAM-A driver) that has been jumpered with the low pass filter ON. No alignment offsets were on during the measurement.

Data lives here:
    /ligo/svncommon/SusSVN/sus/trunk/OFIS/H1/OFI/SAGM1/Data/
        2024-08-01_1741_H1SUSOFI_M1_WhiteNoise_L_0p02to50Hz.xml
        2024-08-01_1741_H1SUSOFI_M1_WhiteNoise_T_0p02to50Hz.xml
        2024-08-01_1741_H1SUSOFI_M1_WhiteNoise_Y_0p02to50Hz.xml

Data comparison script with this data added to it has been updated and committed to
/ligo/svncommon/SusSVN/sus/trunk/OFIS/Common/MatlabTools/
    plotallofis_tfs_M1.m  [rev 11909]