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The procedure written by Jordan Bohn (docdb 10337 ) needs to be updated.


Magnet Shield Fill: Routine Fill


Checklist:

  1.  LL-106-N Shows < 75%.
  2.  Ensure the level probe readout in the magnet power supply rack (cryoplatform) is ON, and the output from it to the PLC is ENABLE.
     Check with the Target Expert on Shift to find the status of the level probe readout status.
  3.  PT-106-N is below 25 psig.
  4.  PT-110-N reads a value between 20psig-60psig.
  5.  Ensure EV-200-N is closed. It may be left open from an earlier time, since the purifier was filled.
  6.  Ensure VNFA on the purifier overview LN2 is CLOSED.
  7.  LN2 tank (Tank #54) outside has > 20 inwc level.
  8.  HCV13 is CRACKED OPEN (on 12/21/2023 we decided to leave it at this position).


Steps:

  1.  Open EV-102-N
  2.  Open EV-100-N
  3.  Monitor TE-104-N, TE-107-N, TE-108-N, and they should reach < 90 Kelvin.
  4.  When the temperatures reach below 90 Kelvin, Open EV-105-N to 100% (input 100% + press 'Enter')
  5.   Close EV-102-N.
  6.  Monitor PT-106-N and ensure it doesn't reach above 25psig. If it reaches 25psig, then STOP the filling by Closing EV-100-N and Opening EV-102-N, then Close EV-105-N (input 0% + press 'Enter').
  7.  Monitor LL-106-N reaching 90%.
  8.  Close EV-100-N
  9.  Open EV-102-N
  10.  Close EV-105-N  (input 0% + press 'Enter').
  11.  After ~4 hrs, ensure TE-104-N, TE-107-N, TE-108-N are at room temperature and then Close EV-102-N.



Warm Magnet Shield Fill


Checklist:

  1.  LL-106-N Shows ~0%.
  2.  The level probe readout in the magnet power supply rack (cryoplatform) is ON, and the output from it to the PLC is ENABLE.
  3.  PT-106-N is below 25 psig.
  4.  PT-110-N reads a value between 20psig-60psig.
  5.  Ensure EV-200-N is closed. It may be left open from an earlier time, since the purifier was filled.
  6.  Ensure VNFA on the purifier overview LN2 is CLOSED.
  7.  LN2 tank (Tank #54) outside has > 20 inwc level.
  8.  HCV13 is CRACKED OPEN.


Steps:

  1.  Open EV-102-N
  2.  Open EV-105-N to 100% (input 100% + press 'Enter').
  3.  Open EV-100-N
  4.  Monitor TE-104-N, TE-107-N, TE-108-N, and they should reach < 90 Kelvin.
  5.  When the temperatures reach below 90 Kelvin, then Close EV-102-N.
  6.  Monitor PT-106-N and ensure it doesn't reach above 25psig. If it reaches 25psig, then STOP the filling by Closing EV-100-N and Opening EV-102-N, then Close EV-105-N (input 0% + press 'Enter').
  7.  Monitor LL-106-N reaching 90%.
  8.  Close EV-100-N
  9.  Open EV-102-N
  10.  Close EV-105-N  (input 0% + press 'Enter').
  11.  After ~4 hrs, ensure TE-104-N, TE-107-N, TE-108-N are at room temperature and then Close EV-102-N.



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