vernon.sandberg@LIGO.ORG - posted 11:01, Friday 08 July 2016 - last comment - 15:07, Friday 08 July 2016(28273)
Return to 40 W Commissioning
We have operated for over 10 hours in "nominal low noise, observation, intent bit set" condition. This was a temporary configuration to allow locking, after the laser diode box failure, for the purposes of testing ER9 pipelines. We are returning to 40W operation.
(Cheryl, Sheila, Kiwamu, Haocun, Ross, Keita)
ISC_LOCK.py and lscparams.py were reverted so the target power is 40W and SOFT offsets are set correctly.
ISS offset was remeasured at 40W and set to -0.932693 (instead of the original -0.9826934814453125).
IMC_LOCK.py was changed to set this offset, and also the final ISS 2nd loop gain was set back to 20dB for 40W (instead of 24dB for 25W).
No change was made to TCS as nobody touched the TCS CO2 guardian yesterday.
IFO got back to the correct 40W nominal low noise state after the above change.
After this, SUS_PI was also changed (yesterday it was accidentally changed such that QPD and OMC-based damping were enabled for the same mode at the same time).