OSEM calibration of H1:SUS-SR3
Stage: M1
2025-07-22_1530 (UTC).

The suggested (calibrated) M1 OSEMINF gains are
(new T1) = 2.174 * (old T1) = 3.213 
(new T2) = 1.610 * (old T2) = 1.517 
(new T3) = 1.569 * (old T3) = 1.494 
(new LF) = 1.331 * (old LF) = 1.733 
(new RT) = 1.374 * (old RT) = 1.494 
(new SD) = 1.390 * (old SD) = 1.793 

To compensate for the OSEM gain changes, we estimate that the H1:SUS-SR3_M1_DAMP loops must be changed by factors of: 
L gain = 0.740 * (old L gain)
T gain = 0.719 * (old T gain)
V gain = 0.545 * (old V gain)
R gain = 0.545 * (old R gain)
P gain = 0.629 * (old P gain)
Y gain = 0.740 * (old Y gain)

The calibration will change the apparent alignment of the suspension as seen by the at the M1 OSEMs
NOTE: The actual alignment of the suspension will NOT change as a result of the calibration process

The changes are computed as (osem2eul) * gain * inv(osem2eul).
Using the alignments from 2025-07-22_1530 (UTC) as a reference, the new apparent alingments are:

DOF        Previous value       New value            Apparent change
---------------------------------------------------------------------------------
L          -5.0 um              -3.1 um                 +1.8 um
T          -21.6 um             -15.5 um                +6.1 um
V           11.8 um              9.8 um                 -2.0 um
R          -576.3 urad          -327.5 urad          +248.9 urad
P          -266.5 urad          -158.3 urad          +108.2 urad
Y          -585.0 urad          -431.9 urad          +153.1 urad

We have estimated a OSEM calibration of H1 SR3 M1 using HAM5 ST1 drives from 2025-05-21_0000 (UTC).
We fit the response M1_DAMP/HAM5_SUSPOINT between 5 and 15 Hz to get a calibration in [OSEM m]/[GS13 m]

This message was generated automatically by OSEM_calibration_SR3.py on 2025-07-22 16:24:05.000267+00:00 UTC

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EXTRA INFORMATION 

The H1:SUS-SR3_M1_OSEMINF gains at the time of measurement were:
(old) T1: 1.478 
(old) T2: 0.942 
(old) T3: 0.952 
(old) LF: 1.302 
(old) RT: 1.087 
(old) SD: 1.290 

The matrix to convert from the old Euler dofs to the (calibrated) new Euler dofs is:

+0.74	-0.0	+0.0	-0.0	+0.0	-0.001
+0.0	+0.719	-0.0	+0.0	+0.0	-0.0
-0.0	+0.0	+0.545	-0.006	+0.0	+0.0
+0.0	+0.0	-1.209	+0.545	-0.003	-0.0
+0.0	+0.0	+0.18	-0.013	+0.629	-0.0
-0.148	+0.0	-0.0	+0.0	-0.0	+0.74

The matrix is used as (M) * (old EUL dof) = (new EUL dof)
The dof ordering is ('L', 'T', 'V', 'R', 'P', 'Y')

Please see the attached images of before calibrating and after calibrating.