after about 2 hours of trying to damp mode 3 with the filters that H1 has been using, with little to no effect, I talked to Jeff about changing the filters, since mode3 damping had always been mariginal. 

Changes to IX mode3:

• removed 1.5KHz filtering that was from some previous attempt to damp at the frequency
• moved the filter I made, title n504.719, to FM2, next to the filter we're currently using, FM1
• moved +/-60deg filters to FM8 and FM9, and adjusted their gain to restore gain = 1 (was found at 1.5)
• created +/-30deg, in FM6 and FM7
• moved the 100db gain to FM10
• saved and loaded
• Jeff made changes to the filtering phase and gain, over the span of about an hour
  • the mode peak in darm was reduced, eventually all the way to background
• filter bank gain is now -40
• I've updated lscparams to reflect these changes, and they were successfully loaded by guardian before reaching NLN

Attachment 1: IX mode3 from abandoning the old filters to damping at relocking H1

• the first vertical marker shows the end of trying with the old filters to the left, and the new filters working on the right
  • mode3 used to have +60deg, and now runs with -60deg
• the second vertical marker shows H1 relocking with the new filters/gain, and successfully damping

Changes to IX mode2:

• updated gains in +/-60deg and +/-30deg, renormalized to a gain of 1
• saved and loaded
• mode2 is running with the same gain as before, -25, though higher gains were used to damp after the ring up

Attachment 2: IX mode 2 from unsuccessful redamping to (mostly) successful damping at relock

• IX mode 2 damping is not reducing the peak to background, but is keeping it from ringing up (needs more work)

Other modes, other optics, damped by Jim:

• EY modes 1 and 6
• IY mode 15
• all were rung up to greater than 5 on the RMS
• all successfully damped at relocking H1

Attachment 3:  IY mode 15

Attachment 4:  IY modes 1 and 6

- Jeff, Cheryl, Jim