aLIGO LHO Logbook

H1 CAL (CAL, ISC, SUS)

darkhan.tuyenbayev@LIGO.ORG - posted 13:37, Friday 13 May 2016 - last comment - 14:49, Tuesday 17 May 2016(27180)

SUS ETMY L2 and L3 stages compensation filters updated with measured zeros and poles

Kiwamu, Darkhan,

We updated the ETMY L1 stage (UIM) compensation filters FM2, FM3, FM4, FM7, FM8, FM9 of ETMY_L1_ESDOUTF_{UL,LL,UR,LR} with zeros and poles more accurately fitted to the most recent measurements by Jeff K. from ER8 (LHO alogs 20846, 21283). We have not updated the acquisition circuit zero-pole pair, because the measurements do not include the response of this circuit (for details see LHO alog 21142).

We've also updated the ETMY L2 stage (PUM) compenstation filters FM1, FM2, FM3, FM6, FM7, FM8 of ETMY_L2_ESDOUTF_{UL,LL,UR,LR} to their fitted values (LHO alogs 20846, 21232).

Python scritps were used to load new vailes into the Foton file, the scripts are based on Kiwamu's script for updating filter in the L3 stage (ESD) (LHO alog 27150). The scripts are committed to CalSVN at

Runs/PreER9/H1/Scripts/SUS/setH1SUSETMY_UIMDriver_compensations.py Runs/PreER9/H1/Scripts/SUS/setH1SUSETMY_PUMDriver_compensations.py

Notes for CAL FOLKS:

UIM and PUM filter replicas in CAL-CS model have not been updated accordingly at the moment;
The extra compensations (for imperfect front-end filters) in the Matlab DARM calibration model are not necessary anymore, must be removed from the model.

Comments related to this report

jeffrey.kissel@LIGO.ORG - 14:49, Tuesday 17 May 2016 (27246)

Link

J. Kissel, K. Izumi, D. Barker

Dave noticed that these changes to the foton filter file never were pushed to the H1SUSETMY front-end with a LOAD COEFFICIENTS, so we 've loaded them just now.

While at it, we've made the necessary update to the CAL-CS actuation compensation, which involved simply turning OFF (and subsequently deleting to avoid future confusion) FM6 of the H1:CAL-CS_DARM_ANALOG_ETMY_L2 and H1:CAL-CS_DARM_ANALOG_ETMY_L3 filter banks called "mis_coil" that were originally installed before O1 (see LHO aLOG 21275).