J. Kissel reporting for D. Sigg, K. Kawabe, L. Barsotti, M. Evans, K. Izumi, R. Savage, P. King, J. Oberling, J. Driggers, R. McCarthy

The following ideas / action items were discussed at this mornings 9a LHO commissioning meeting to battle / reduce intensity noise; the primary high-frequency noise contribution/ limitation to the DARM sensitivity at the moment. I don't know every detail, so hopefully you can glean the action from the words I was able to capture from the meeting. The list is also in no particular order, but the hope is to accomplish most of these tasks over the next few days.

- Look at recent DBB scans for any evidence of free-running intensity noise badness.
- Reduce PSL HPO chiller flow rate from 0.7 [L/min] to 0.5 [L/min] returning to O1 level flow rate
- Remove ND filter that had been recently installed to rule out scattering noise from the 1st loop PD array
- Inspect PMC output ports for excessing scattering / badness
- Move EOM on its translation stage, checking for changes in intensity noise output.

- Install high-sensitivity electronics on EOM PD (IO_AB_PD3 in D0902114, read out as H1:IMC-PWR_EOM_OUT16) and IMC PWR IN (IO_AB_PD2 in D0902114, readout as H1:IMC-PWR_IN_OUT16)
- Install extra high-sensitivity PD in ALS path on PSL table. (This path is upstream -- toward the front-end laser -- of the EOM. The PD will be used to compare the intensity noise upstream vs. downstream of the EOM  which is currently an area of suspicion. The worry is that there is too much between the pickoff on the PSL and where this pickoff is already captured on ISCT1, which may confuse the intensity noise measurement)

- ISS front-end model reboot in order to improve channel naming conventions for ISS channels (e.g. INNERLOOP / OUTERLOOP to FIRST/SECOND LOOP-like changes)
- PEM front-end model changes to store PSL accelerometers at higher sampling rate
- ASCIMC front-end model changes / or create a new front-end model to process/store EOM PD, IMC PWR IN PD, and IM4 TRANS at higher, (4? 16 kHz?) rate. 

- Modify new ISS 2nd loop analog electronics (drill a few holes in front panels) to pull out more signals to analog BNC spigots

- Move IMC / IFO alignment offsets to find jitter coupling minimum.


Hope this helps!