Reports until 16:08, Thursday 01 August 2013
H1 SUS
mark.barton@LIGO.ORG - posted 16:08, Thursday 01 August 2013 - last comment - 10:29, Friday 02 August 2013(7326)
ETMX TFs

Richard investigated the problem with the ETMX BIO reported in 7313 and got M0, R0 and L1 fixed, but not L2. I verified that actuation and damping now work for M0 and R0, but couldn't check L1 because the OSEMs there are still backed out.

To see whether it will be worth Doug and Jason's time to do alignment tomorrow or whether more mechanical adjustments are in order, I'm starting a round of undamped M0 and R0 TFs on ETMX from 4:10 pm.

Comments related to this report
mark.barton@LIGO.ORG - 10:29, Friday 02 August 2013 (7332)

The measurements had completed successfully when checked at 08:30:

M0: ^/trunk/QUAD/H1/ETMX/SAGM0/Data/2013-08-01-1059433785_H1SUSETMX_M0_0p01to50Hz_tf.mat

R0: ^/trunk/QUAD/H1/ETMX/SAGR0/Data/2013-08-01-1059452258_H1SUSETMX_R0_0p01to50Hz_tf.mat

For M0 there are a few small L/P peaks in Y in M0 and the fundamental pitch mode is a touch low, but otherwise everything is pristine.

R0 has the usual issue where the pitch mode is higher than in the model due to the stiffness of the cables but otherwise looks good.

The Y issue in M0 is similar to past cases of misaligned OSEMs rather than touching, so the suspension is OK to do alignment on.

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