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- Close angle valve VV3202 isolating the plasma beamline from the plasma turbo
- Close valve FV-PB on the foreline of the Picnic Basket. Turn off Picnic Basket turbo
- Close Beryllium window valve VV3208
- Adjust the flow regulator to reach the desired fill pressure. There is a slow so make changes slowly.
- In previous tests a setting of ~0.8 SCFH results ~5 Torr for He
- 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.
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Drain the
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IP:
- If using the Li oven, follow appropriate procedures to shut down and secure the oven
- When ready to drain the He gas - close the fill valve. The IP pressure will drop at an initial rate of ~1 Torr/min.
- Open valve FV-PB on the foreline of the Picnic Basket to aid in the pump down
- Start the PB turbo when the IP pressure is below 1 Torr.
- Close the valve on the gas bottle.
- Open the DS Beryllium window valve VV3208 after the IP pressure is <<1 Torr.
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