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  1. Shut Down and Restart Procedures
  2. HR3 operations
  3. Filling LN2 on Purifier to the purifier using a portable Dewar
  4. QT System Starting Procedure
  5. Liquefier Cleaning when Dewar contains LHe
  6. Cleaning QT purifier Helium-space (pumping-purging the purifierOLD)
  7. Cleaning QT purifier LN2 space
  8. Fixing dewar level indicator (related to (9))
  9. LHe Dewar cleaning procedureDewar Cleaning Procedure (using the transfer line)
  10. Cold-helium Circulation Procedure (Cooldown Transferline)
  11. Cleaning gHe outside tank using the purifier
  12. Resolving Liquefier Blocking Alarm when Liquefier is on Liquefy Mode
  13. Resolving Liquefier Blocking Alarm when Liquefier is on Idle Mode
  14. Purifier LN2 Fill Procedure-updated-labels.pdf ( Please use this updated one, or the original one on docdb 10337 by Jordan Bohn)

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  1. The volume of an outside gHe tank: 1600 cubic feet (45306.95 L)
  2.  The pressure increase in the gHe tank per tube (in the tube trailer) is 10psi (i.e. 10 psi difference per tube)
  3. 100 slm rate on Magnet FC is equivalent to ~ 192 LHe liters per day (i.e. assuming both LQ A and B are running)
  4. QT recommendation to keep system minimally pressurized: ~20 psi
  5. 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).
  6. Putting a 2200 psi gas bottle into the system will produce 8 liquid liters per bottle.
  7. HR3.docx (It's a copyright of QT-technology. Please do not make it public. )

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