Instructions for reaching a static fill of gas in the IP while the DPS is running.
This guide assume the fill is being performed in a state where both the upstream and downstream Be windows have holes, and that a fixed Be window exists on the upstream side of the IP and a movable Be window on the downsstream side
Step-by-step guide
- Verify vacuum conditions in the IP of approximately 1e-6 Torr, and UHV in the US-DPS and DS-DPS.
- Start a strip tool and load the file: DPS_Gasjet_Pressures.stp
- Verify the oven fill line is connected to the gas bottle of the desired gas type.
- Open the gas bottle and set the regulator to 10 psig.
- Read the gas bottle pressure and ensure that there is enough gas for the intended fill.
- Previous measured rate of He usage at 5 Torr IP pressure = 165 psi/day (one full 2500 psi bottle drained in ~15 days)
- Verify gas bottle on fill line #2 is closed and that the fill valve for this line is closed.
- If operating the Li oven, follow the E300 procedure to prepare the Li oven for a static fill.
- 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
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