Faulty auxiliary receiver in chopper 2X LLRF system makes control loop quadrant detection unspecific. Since this procedure has been already activated we lost phase baseline. It is still possible to run chopper 2X LLRF but after power glitch or another quadrant init activation phase my jump by multiplication of 90 deg ( this change will not be visible on the screen).
We are planning to replace this module tomorrow.
Many BLVac trips while ramping up cavity 1. That will likely clean up though. Field Emission onset at ~4.1 MV/m (GMES)
At about 5 MV/m (GMES) I began to see indications of a too high heat load. Calling Emax there.
Started on Cavity 2. Some BLVac activity but no trips. FE Onset at ~3.7 MV/m (GMES)
Looks like quench at 5.7 MV/m. Will verify tomorrow.
So far, this cryomodule still has problems at least with end cavities.