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Reports until 06:39, Tuesday 30 October 2012
H2 SUS
jeffrey.kissel@LIGO.ORG - posted 06:39, Tuesday 30 October 2012 (4549)
H2 SUS ITMY COILOUTF Gains Restored to Nominal (and report of new OSEMINF values)
After a long, sorted history (see LHO aLOG 4112, and previously LHO aLOGs 2109 and 2022), Travis and I were apparently successful in re-installing the M0 OSEMs on H2 SUS ITMY in such a way that they now obey convention, as per E1000617, and subsequently T120015. 

I've changed the COILOUTF gains accordingly, such that they're now

      F1 F2 F3 LF RT SD
M0 = [ +  -  +  -  +  -]
R0 = [ +  +  -  +  -  -]

I've confirmed that the damping loops are stable on M0 with these new COILOUTF gains (R0 OSEMs are not centered, so I cannot confirm their functionality, but nothing has changed there.)

Also, as per request, with the open light currents as measured by the test stand setup, the H2 SUS ITMY OSEMINF gains an offsets should be / are:

M0_OFFSETS =
F1 -14764
F2 -14379
F3 -14471
LF -13457
RT -12564
SD -14795
M0_GAINS =
F1 1.016
F2 1.043
F3 1.037
LF 1.115
RT 1.194
SD 1.014

R0_OFFSETS =
F1 -12472
F2 -12619
F3 -13171
LF -13894
RT -12380
SD -13062
R0_GAINS =
F1 1.203
F2 1.189
F3 1.139
LF 1.080
RT 1.212
SD 1.148 

Displaying report 1-1 of 1.