camilla.compton@LIGO.ORG - posted 19:36, Tuesday 27 February 2024 - last comment - 09:06, Thursday 29 February 2024(76021)
ITMY Ring Heater test running overnight: 2W/segment for 12 hours
After aligning ITMY and checking HWS, I've set the ITMY ring heaters to be on at 2W/segment for the next 12 hours: ~7:30pm to 7:30am PT (03:30UTC to 15:30UTC). ITMY will then spend tomorrow cooling down. This test should help the IFO modeling team get more recent data on the effect the ring heaters have.
Using script: python3 /tcs/common/scripts/power_adj_scripts/ring_heater_schedule.py ITMY -s 'now' -d 12 -p 2.0
ITMY ring heaters turned back to nominal 0W at ~15:32UTC, plot attached.
HWS plots after 20 minutes and 2 hours attached. The origin cross should be the center of the IFO beam, we'll need to check that's correct once we start locking. Note that HAM5 is currently locked but we checked that the SR3 (HWS beam bounces off) oplevs are within 3urad of nominal.
Updated plot attached. Shape and size of simulation is very similar to data (simulation gives 70uD single pass, measuring 140uD double pass). There is a strange initial transient bump in the SIM model, should check it which filter is incorrect and causing it.