[Daniel, Kar Meng, Eric, Sheila]

This afternoon, we continued with the realignment of the VIP after the VOPO swap.  When we first started, we briefly lost the CLF input alignment between the fiber and the VOPO cavity.  It turned out that the collimator was loose in the mount.  We took out the collimator holder and noticed that the 2nd grub screw hadn't been tightened all the way.  After fixing, we realigned the cavity till we could see a reasonably strong beam in transmission while the cavity was scanning.  

We then began the painful process of aligning the weak transmitted beam through the various components in HAM 7.  Using only the first steering mirror between the VOPO and SFI1 on the VIP, we managed to get the beam roughly aligned up to FC1.  However, we couldn't quite figure out how to get the return beam from the filter cavity retroreflected through SFI1 again.  We eventually decided to move FC1 a bit to get the beam back through SFI1, through SFI2, and onto the iris right before ZM4.  We're thinking of doing the following to finish the alignment process:

• Walk the alignment a bit more to get to the beam diverter and onto the 1064 trans PD on SQZT7
• Optimize the alignment of the seed to the VOPO using the PD
• Dither lock the seed and finish aligning the SQZ path on HAM 7 with the brighter beam.  We will need to revert the FC1 alignment at some point.  Initial settings before we started tweaking things:  
  • H1:SUS-FC1_M1_OPTICALIGN_Y_OFFSET = - 153
  • H1:SUS-FC1_M1_OPTICALIGN_P_OFFSET = 232