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- Shut Down and Restart Procedures
- Filling LN2 on Purifier Dewar
- QT System Starting Procedure
- Liquefier Cleaning when Dewar contains LHe
- Cleaning QT purifier Helium-space (pumping-purging the purifier)
- Cleaning QT purifier LN2 space
- Fixing dewar level indicator (related to (9))
- LHe Dewar cleaning procedure
- Cold-helium Circulation Procedure (Cooldown Transferline)
- Cleaning gHe outside tank using the purifier
- Resolving Liquefier Blocking Alarm when Liquefier is on Liquefy Mode
- Resolving Liquefier Blocking Alarm when Liquefier is on Idle Mode
- Purifier LN2 Fill Procedure.pdf (or see docdb 10337 by Jordan Bohn)
- LN2 Shield Fill Procedure.pdf (or see docdb 10337 by Jordan Bohn)
Useful information
- The volume of an outside gHe tank: 1600 cubic feet
- 100 slm rate on Magnet FC is equivalent to ~ 192 LHe liters per day (i.e. assuming both LQ A and B are running)
- QT recommendation to keep system minimally pressurized: ~20 psi
- Running from 40 psi down to 20 psi would produce about 80 liquid litters and we should be able to do that in about 10 hours (assuming both LQ A and B are running).
- HR3.docx
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