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Magnet_LHe_Fill_Checklist.docx
Magnet_LHe_Fill_Checklist.pdf

Preparation:

1. About ~3 hours before the fill, select the Dewar (A or B) to perform the fill (based on the current available LHe levels).
2. Set the “Dewar Set Pressure” to 3 psi on the QT HMI Liquefier A/B screen’s “Settings” page.
3. Check the outside gHe pressure and make sure it is below 90 psi. If it's equal, near, or above, then relieve its pressure down to ~80 psi.
4. Check The cave for insulation on cryostat with fans.
5. Open the Connect to the “Cryo Control Panel” on the cryo-computer, or connect to the Cryo Control Computer (via VNC: see Polarized Target System for SpinQuest at FNAL for the instructions)
6. Monitoring screens during the fill
   a) "Transfer-Line Cool Down" : During the pre-cool
   b) "LHe Transfer": During the fill
   

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