Yesterday (Mon July 4th), I prepared the system for the SQZ measurement campaign of this week.

First there was a change in the PLLs setpoints (slow) during the week-end, for unknown reasons : 

Old one:

• MAIN: 27029 
• CC: 34477
• SC: 33220

New one:

• MAIN: 26329
• CC: 33864
• SC: 32035

Then the FC was aligned with both GR and IR. Once this was done I did some quick measurements of FIS with RR :

• before 10:47 UTC : CC contrast optimization on RR
• 10:48 UTC : scan of phase from 0 to 3.5 rad in 120s. ASQZ at 0.86 rad, sqz at 2.18 rad.
• 10:54:00 to 11:01:00 : ASQZ phase.
• 11:01:10 to 11:06:10 : SQZ phase. Fast unlock at 11:05:45.
• 11:07:20 to 11:12:20 : Shot noise.

After this, the RR was removed and the system was left untouched. This morning it was found that the IR_AA was probably left on when the RR was moved in, causing IR_M3 and IR_M5 to change positions. This means that the measurements of FIS on RR had probably more losses in alignment. 

Attached is the plot of the FIS on RR. I estimate : 

The losses are quite high (14%), correlating with the un-optimal alignment of the IR_M3 and IR_M5.