Sheila, Gabriele, Elli

ETMx ring heater turned on at 15:04:16 1:56:00 UTC requesting 0.5 W in upper and lower segments.

The ring heater is on because it looks like we have been watching a parametric instability build up at 15540.5 Hz over the last hour or so of lock.  There is coherence between the X-arm ASC QPDs and Darm at this frequency, which is why we are trying using the ETMX ring heater.  There is a script  in /ligo/home/eleanor.king/netgib/SR785/SPSR785omcdcpds.yml that we have been using to track the amplitude of this mode (use the command <    ./SRmeasure SPSR785omcdcpds.yml > to take a measurement).

For some reason all of the gains on the ETMx upper and lower segments were set to 1, so I have changed them back to what they were in February (which is also what the ITMs are currently set to).

H1:TCS-ETMX_RH_SET UPPER&LOWER DRIVECURRENT_GAIN =12.5

H1:TCS-ETMX_RH_UPPER&LOWER VOLTAGE_GAIN =3.5

H1:TCS-ETMX_RH_UPPER&LOWER PCB_GAIN=3.5

H1:TCS-ETMX_RH_UPPER&LOWER CURRENT_GAIN=-0.08