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- If it was open, close angle valve VV3202 VV3201 isolating the plasma beamline from the plasma turbo
- Close valve FV-PB on the foreline of the Picnic Basket. Turn off Picnic Basket turbo. Wait for 5 min for turbo to stop (the speed readback immediately goes to zero, but it takes some time for the turbo to stop)
- From the E300 panel - Set Fill Gas #1 to ON
- From the MFC controller - Adjust the "Flow setpoint" on the MFC to reach the desired fill pressure.
- There is a slow response so make changes slowly.
- In previous tests these set points were used with the MFC:
- Helium at 5 Torr = 420
- Argon at 5 Torr = 130
- Hydrogen at 5 Torr = 580
- It will likely take 5-10 minutes for the pressure to approach the pressure setpoint. Make small changes and wait for 5-10 minutes for the pressure to stabilize before proceeding with more adjustments.
- Continue to monitor the IP pressure and make minor adjustments to the flow rate if necessary.
- To adjust the pressure, simply increase or lower the setpoint on the MFC.
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