Following on from Jenne's common ring heater change (lowering power), we are taking a differential ring heater step tonight. We will reduce ITMY to the same power as Jenne did, and take a smaller step on ITMX. If there are problems with ASC while reacquiring lock, these changes might need to be reverted.
| ITMX RH Filter input [W] | ITMY RH filter input [W] | |
| Nominal | 0.5 | 1.4 |
| Common step today | 0 | 0.9 |
| Differential step tonight | 0.25 | 0.9 |
( - I'm quoting filter input requested power here, there's an offset from the actual ring heater set power I'm not sure about.)
Craig has coded up a live monitor of the frequency and intensity noise lines which I'm running on ZOTWS22. The realtime monitors are found here:
/ligo/home/craig.cahillane/monitors/AWG_Line_Monitors.py
To run them you might need to use craig's environment, by running:
source /opt/rtcds/userapps/release/cds/h1/scripts/setup_anaconda
source activate cragenv
(edit: original title to alog quoted wrong start time timezone for measurement)
Just to clarify: the nominal ring heater values I quoted in this alog are 0.1 W higher than the actual nominal ring heater vales: I got confused by the slow response of the filtered output.
Before yesterday, ITMX_RH_INVERSE_FILTER_IN was 0.4 W, and ITMY_RH_INVERSE_FILTER_IN was 1.3 W.