Another attempt today to run the HAM6 system with only the 500 l/s "main" ion pump (valved out the turbo pump), but once again the controller was not able to keep up with the load.
We are back to pumping with the turbo/ion pumps in parallel.

Note: The turbo pump was valved out today at a pressure of 4.0x10^-07 torr.
Yesterday the turbo was valved out at a pressure of 5.3x10^-07 torr.