rahul.kumar@LIGO.ORG - posted 13:04, Wednesday 21 January 2026 - last comment - 09:41, Wednesday 28 January 2026(88834)
HAM1 update - JAC damper
Jason. JennieW, Rahul
This morning we added the damper parts to the JAC in HAM1 chamber - see picture attached. The cables were re-routed slightly so that they don't interfere with the damper.
I have finger tightened the screws of the damper for now - since no torque spec was provided and we were worried that tightening them too much might affect its position/angle.
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EPO-tagged.
Masayuki and I fully tightened the JAC body mode dampers yesterday. We were only able to get the screws ~1/2 turn past finger-tight before we could no longer tighten them. No changes in JAC alignment were observed while we were doing this.