Craig, Danny, Georgia

This week (nominally tomorrow) we plan to try taking some small steps down in power with the SR3 heater. We will run several injections before taking each step, and to leave the interferometer in Observing for an hour at a time between steps, while the system reaches thermal equilibrium.

Before taking heater steps

    * Engage SR3 cage servo
    * Let IFO thermalise
    * Injection: DARM plant (DARM and PCAL excitations)
    * Injection: Frequency noise (Band-limited Craig injections)
    * Injection: Intensity noise (Noise budget style broad band injections)
    * Injection: 9 MHz RIN (Broad band injection)
    * (Maybe) turn off ADS (caused problems in the past when SR3 heater serring changed)

Take a 0.5 W step down on SR3 heater

    * Reconcile SDF, return to observing for 1 hour

After an hour has passed

    * Check for offsets in SRC ASC
    * Rerun all injections listed above
    * If ADS is off, maybe let it come back on and converge

We will repeat this for ~3 steps of the SR3 heater