Vessel backfilled with CF4 to 40mbar(30 torr), pressure reached before backfill was 8.44x10^-7 mbar
Drift field achieved and stable 3200V (compared to 2700V previously) Getting better can at do 100V/cm field at least.
Anode voltage Bottom left starts to spark at approx 0.5-1Hz when at a voltage of 650V, 50V short of where I usually try and take data to see how everything is behaving.