In the afternoon shift we recovered the alignment between SQZ and ITF

At 15:30 UTC we conclude to open the SQB1 shutter and to rotate the SQB1 HWP2 in order to send SQZ light toward ITF

At 15:32 UTC we open the fast shutter to check the level of B1 4MHz mag

Then we open the SQZ Fast Shutter and with the automation we started the realignment

We found that SQB1_M1_X was saturating at +9V. Thus we increased by a factor 5 the amplitude of dither lines, then we discharged SQB1_M1_X acting on the picomotors SQB1_M32_H and SQB1_M33_H in positive direction with iterations of 700 steps

At the end of the process the SQB1_M1_X was at 5.2V

Then we checked the clipping with SQB1_RetroRef but was ok. So finally we moved SQB1_LC_X and we passed from -3300 um to -3700 um and the magnitude increased at its maximum

We noticed that passing from SQZ to ASQZ the effect on the range was negligible thus we decided to run a phase scan.

Start GPS 1440867965, end GPS: 1440869748

The squeezer is completely recovered but its effect on the ITF is negligible (fig 1).We left the interferometer with SQB1 shutter closed and SDB1 shutter open in order to not unlock