Pressure should be 1e-6 mbar
Position heater between 2 sources, opposite to YBCO
Open N2 purge on the pump. Do not forget this!
Open the O2 valve at the front of the system. Do not touch the O2 needle valve! Flow should be around 40.
Open the YBCO shutter, keep other shutters closed (unless you make a multilayer of course)
Switch on the YBCO power supply, current regulation
Set the setpoint at 8 ma, display actual current and voltage
Switch turbo to pressure control, setpoint 3.5
Short after that, when the pressure is between 5e-2 and 1e-1 torr, switch power supply to on. The plasma should ignite. Get help if it doesn't!
Let the pressure increase until the voltage gets below 350-380 V (the lower the better!)
The voltage keeps decreasing, keep it constant at 350-380 V by increasing current (it is critical that you follow this rate given by the O2 backfill rate of the chamber and not faster!
The turbo pump is at 0 Hz now and starts to accelerate
At 100 Hz, set pressure setpoint to previous value from the logbook
Keep increasing current, set current to 350 mA (never get above 390 V!)
Use the Keithley to read O2 pressure, fine adjust setpoint so that pressure is between 2.99 and 3.01 mbar (better: 2.995 - 3.005)
Let everything stabilize