- Check the outside gHe pressure and make sure it is below 85 psi.
- Insert the stinger into Dewar C.
- Set up the power supply for the "pressure builder" of the Dewar C.
- Navigate to the "Overview Screen" on QT HMI.
- Start pre-cool phase: Open VPC → Open VJV(A/B) → Monitor TX1, TX2, TX3
- After ~8mins: Open magnet-bypass (hand-valve right next to the magnet flow controller) → Open VJVT on the HMI screen.
- After ~1min: Close VPC and monitor magnet pressure and maintain ~5psi using the pressure builder on the Dewar C.
- Try to regulate the pressure difference of ~4psi between the magnet and the Dewar (during the entire fill), using the pressure builder on the Dewar C.
- After a couple of minutes, you will observe that the magnet pressure drops down suddenly and stay around ~1.4-1.5 psi (this indicates that LHe is flowing to the magnet after the pre-cooling of the last part of the transfer line).
- Fill the magnet until the level shows ~44% → Open VPC → Close VJVT → Close VJV(A/B) → Close Magnet bypass hand valve. Make sure that you leave the VPC open to capture all the boil-off from the transfer line until it is warm (check TX1).
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