Reports until 10:02, Friday 07 June 2019
H1 ISC (TCS)
sheila.dwyer@LIGO.ORG - posted 10:02, Friday 07 June 2019 (49738)
started step of ETMY ring heater

TJ, Ed, Sheila

We started a step up in the ring heater power for ETMY (while in observing) to see if we can identify which optic the PI mode that rung up Thursday morning (49698 and comments).  

To do this step I added both the ETM ring heater guardians to the list of excluded guardians in GRD_IFO, so that we can use them to speed up the ring heater steps.  When I loaded IFO_GRD we were momentarily taken out of observe.  

I took the TCS_ETMY_RH_PWR guardian to RESET, but had trouble entering a number in the H1:TCS-ETMY_RH_INVERSE_FILTER_IN field, TJ helped me figure out that I was just confused by a strange feature of the MEDM screen.  We stepped the requested power from 0.2W to 1.2W for ETMY at 16:53 UTC on June 7th.

Note: The most recent summary of test mass mode identifications I know about is the attachment Georgia pointed me to on this alog from Terra (45812), which was after the test masses were replaced.  The only 10400 mode which isn't identified there is ETMX, so that might suggest that the mode that rang up Thursday (at 10430.5 Hz) could be on ETMX, or is not a drumhead mode.   We initially suspected ETMY since there is more power in the Y arm, and ITMY has not been replaced since the mode identification that Carl linked in his alog.