I've made plots comparing the M1 stage BSFM BOSEM noise to the BBSS QOSEM noise to see how much better we are. This is similar to the plots TJ O made in 91466. During the time the BBSS data was taken from, we did have the LED sum current feedback switched on, but comparing our BBSS QOSEM noise to the two QOSEM noise floor plots (taken from G2501105 slide 29), it really looks like we are currently being limited by the constant LED current, as if we didn't have the feedback on at all.

We know the sum current feedback loops are doing something because when we first turned them on, they adjusted the sum counts on two of the osems that were reading too high of counts, but based on these plots it doesn't look like they're doing much? TJ O and I will talk with Tom to investigate more.

Results:
/ligo/svncommon/SusSVN/sus/trunk/BBSS/H1/BS/SAGM1/Results/2026-07_OLG_tfs_4_BSFMvsBBSS/allDampRegressCompare_H1SUSBSFMvsBBSS_M1_NoiseComparison_1435435038vs1469227619-1200.pdf
r13134

Loop suppression used to divide out:
BBSS: /ligo/svncommon/SusSVN/sus/trunk/BBSS/H1/BS/SAGM1/Data/Data/2026-07_OLG_tfs_4_BSFMvsBBSS/2026-07_H1SUSBS_M1_CDBIOState1_WhiteNoise_{L,T,V,R,P,Y}_0p02to50Hz_OLGTF.xml
BSFM: /ligo/svncommon/SusSVN/sus/trunk/BSFM/H1/BS/SAGM1/Data/2023-07-18_1740_H1SUSBS_M1_CDBIOState_1_OLDampingON_WhiteNoise_{L,T,V,R,P,Y}_0p01to50Hz_OpenLoopGainTF.xml