Ryan C, Rahul

The broken PSAMS unit has been replaced (again for the 2nd time in the last two weeks) with a repaired one (ZM5-SN4, repaired by CIT and characterized by Camille). Once the PSAMS optic was installed in ZM5 suspension, we suspended all stages and balanced it and laced the mighty mouse cable. ZM5 was then re-installed in HAM7 chamber and dogged down by two dog clamps for now.

Inside the chamber, the PSAMS and BOSEM cables are now connected to the electronics chain and all stages of the suspension are set free. 

I will take health check measurements once the front end comes back online.

In the meanwhile we tested the PSAMS near the SQZ racks and the results are given below,

SG (Strain Gauge) resistance was measured to be 355.7 ohms (pin 11&24) and 707 ohms (pin 12&24).

We were able to drive the PZT voltage from 0 to 200V and obtain the strain gauge voltage ranging from 0.365V to 5.41V.

Attaching latest pictures of ZM5 below after it has been re-installed in the chamber.