Once the HWS-DET beam has been re-centered (54004), we started the measurements to calibrate the CH.
Thus, we switched on the NI CH at 19.28 UTC injecting P=115 mW, then we switched it off at 20.31 UTC.
We left the CP cooling down, we increased the power up to P=160 mW, and we switched it on at 22.15 UTC. Since it is the current power used for the ITF work, it has been left ON for the tomorrow ISC activity.
At 23.52 UTC also the NI DAS actuators have been switched ON at the previous powers (see tab 1).
The analysis of the data will follow.
Tab.1
| CH (W) | DAS IN (W) | DAS OUT (W) | |
| WI | 0.08 | 0.24 | 0.54 |
| NI | 0.16 | 0.39 | 1.95 |
We left the arms locked on the IR.