Reports until 18:13, Thursday 13 October 2022
H1 SUS
elenna.capote@LIGO.ORG - posted 18:13, Thursday 13 October 2022 - last comment - 13:41, Tuesday 24 June 2025(65327)
HSTS new damping installed on MC1-3

Today I installed Jeff's Level 2 HSTS damping filters on MC1 2 and 3. See alog 65310 as a reference for installation and rearrangement of the filters. I measured the new OLG for all dofs of MC1, and measured both the old and new OLG for all dofs of MC2. See the SusSVN for the OLG measurements.

The new and old filters are set up following the same scheme as we did for the recycling cavity mirrors. The SDFs have been updated for the new locations of the old filters (see attached screenshots).

Once I finished the measurements, I took all three MC damping filters to the new filters, and confirmed the IMC still locks with the new damping filters (yay). After, I reset the MC damping filters to the old filters for the time being. I am leaving the IMC locked overnight (with old damping filters).

Images attached to this report
Comments related to this report
jeffrey.kissel@LIGO.ORG - 13:41, Tuesday 24 June 2025 (85291)
Here're the templates for the MC1 and MC2 that Elenna used for these measurements:
/ligo/svncommon/SusSVN/sus/trunk/HSTS/H1/
    MC1/SAGM1/Data/
        2022-10-13_1900_H1SUSMC1_M1_CDBIOState_1_WhiteNoise_L_0p01to100Hz_OpenLoopGainTF_new.xml
        2022-10-13_1900_H1SUSMC1_M1_CDBIOState_1_WhiteNoise_P_0p01to100Hz_OpenLoopGainTF_new.xml
        2022-10-13_1900_H1SUSMC1_M1_CDBIOState_1_WhiteNoise_R_0p01to100Hz_OpenLoopGainTF_new.xml
        2022-10-13_1900_H1SUSMC1_M1_CDBIOState_1_WhiteNoise_T_0p01to100Hz_OpenLoopGainTF_new.xml
        2022-10-13_1900_H1SUSMC1_M1_CDBIOState_1_WhiteNoise_V_0p01to100Hz_OpenLoopGainTF_new.xml
        2022-10-13_1900_H1SUSMC1_M1_CDBIOState_1_WhiteNoise_Y_0p01to100Hz_OpenLoopGainTF_new.xml

    MC2/SAGM1/Data/
        2022-10-13_2230_H1SUSMC2_M1_CDBIOState_1_WhiteNoise_L_0p01to100Hz_OpenLoopGainTF_new.xml
        2022-10-13_2230_H1SUSMC2_M1_CDBIOState_1_WhiteNoise_P_0p01to100Hz_OpenLoopGainTF_new.xml
        2022-10-13_2230_H1SUSMC2_M1_CDBIOState_1_WhiteNoise_R_0p01to100Hz_OpenLoopGainTF_new.xml
        2022-10-13_2230_H1SUSMC2_M1_CDBIOState_1_WhiteNoise_T_0p01to100Hz_OpenLoopGainTF_new.xml
        2022-10-13_2230_H1SUSMC2_M1_CDBIOState_1_WhiteNoise_V_0p01to100Hz_OpenLoopGainTF_new.xml
        2022-10-13_2230_H1SUSMC2_M1_CDBIOState_1_WhiteNoise_Y_0p01to100Hz_OpenLoopGainTF_new.xml

There don't appear to be measurements of MC3's open loop gain TFs.