betsy.weaver@LIGO.ORG - posted 08:48, Tuesday 31 January 2012 - last comment - 12:15, Tuesday 31 January 2012(2110)
H2 ETMy Status
Yesterday Travis and I finished lacing the OSME cables and suspending the ETMy reaction chain. The chain is hanging side-shifted 1-2mm relative to the main chain, so we will need to make some adjustments to fix that. We made one round of coarse pitch adjustment and now Jason is looking at the DOFs closer with the theodolite/autolevel.
Set up an optical level to look at the ERM and while I currently have no way of quantitatively measuring the ERM height, I can at least confirm that it is in fact sitting slightly high and little to the left (when viewing from the HR side of the ETM). If I had to guess, I'd say the ERM is sitting roughly 1mm high.