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VIS (EY)
jenne.driggers - 22:36 Monday 16 September 2019 (10551) Print this report
ETMY damping updated

I have added velocity damping of the MN oplev to the MN stage of ETMY, as well as for the TM stage of ETMY to the TM stage. 

I have turned off the outputs of the P## filtes in the OLSERVO screen, since most of them seem to not do much, or ring up modes.  I'm not happy with it yet though, so we need to revisit this more tomorrow - just wanted to write a note explaining why ETMY is in a different state for now.

I know that people have told me this, but to show myself, I did a rough calibration of the ETMY photosensors to the ETMY test mass staget optical lever (the marionette oplev has a different calibration by a factor of almost 2!)  Anyhow, indeed the photosensors are very, very noisy, and it's not clear that using them even just for damping will be very useful.

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