betsy.weaver@LIGO.ORG - posted 16:34, Wednesday 31 July 2013 - last comment - 16:48, Wednesday 31 July 2013(7312)
H1 ETMx Monolithic suspension ~under damping control
Travis, Betsy, Mark
Today, we continued on the ETMx monolithic suspension assembly. We fixed a few course misalignments, plumbed in all 12 of the top stage BOSEMs, and launched damping loops. Mark is now doing a few checks of the BOSEM actuation as well as taking a sneak peek at the resonances to check for rubbing before we invoke IAS for fine alignment sometime tomorrow.
I attempted to enable damping and take TFs but it appears that actuation is disabled. Changing the BIO state request doesn't give changes in the readback flags, so probably the BIO chassis is powered down or broken.
In the meantime, to get Betsy and Travis a quick go/no-go, I started a set of spectra at 16:40 Pacific. (Obviously the damped will be the same as the undamped.)