We starteed to realign the SQZ beam toward ITF.

Preliminary operation

SQZ_MAIN in SQZ_LOCKED_NO_FC, SQZ_FLT in GR_AA

Open SDB1 Shutter before the ITF lock

CC PLL stopped to work: we reduced the starting set point from 29585 to 29500. 

Remove SQB1 Retroreflector: at 17:52:38. 300000 steps verticl positive. Then we relaigned mainly in vertical to optimize again the HD 4MHz mag. We measured about 8.7dB of ASQZ and 5.6 dB of SQZ

Removed SQB1 Shutter steps 500k downward at 18:05:21 UTC

HWP Rotated for Injection into ITF at 18:12:40 -32500steps

The interferometer unlocked at: 18:09 UTC

Opening of shutter and check alignment

New lock in LN2 at 18:25 UTC

B1_4MHz 0.18mV 

Working on SQB1 M22 and M23 I managed to reach 1.6mV of magnitude but the signal is strange and also the CC error signal is strange. I don't manage to close the CC loop. i also disengaged the active phase noise cancellation loop but I did not improve.

I leave all the shutter open SQB1 and SDB1. Only the fast shutter is closed