Difference between revisions of "MEDCON6 Shutdown Plan"

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#  Text Chris Keith at 757-746-9277.  -- Tim
 
#  Text Chris Keith at 757-746-9277.  -- Tim
 
#* Chris will come in and secure the system.  That should require an access to the hall of only 5 minutes;
 
#* Chris will come in and secure the system.  That should require an access to the hall of only 5 minutes;
#** Ensure that both H2 tanks are valved off
+
#** Ensure that both H2 tanks are valved off ?
#** Turn off the turbo station that is pumping on the OVC
+
#** Turn off the turbo station that is pumping on the OVC ?
#** Turn off the pulse tube compressor and kill power at the service disconnect
+
#** Turn off the pulse tube compressor and kill power at the service disconnect ?
  
 
==Solenoid==
 
==Solenoid==

Revision as of 18:20, 22 March 2020

Initially based on the Florence shutdown checklists.

File:HCO - Hall D Electronics Hall D Shutdown Checklist.pdf
File:HCO - Hall D Mechanical Hall D Shutdown Checklist.pdf
File:HCO - Hall D Solenoid Hall D Shutdown Checklist.pdf
File:HCO - ENP Target Hall D Shutdown Checklist.pdf


Target

  1. EMPTY the target. This boils almost all the hydrogen back into the storage tank and takes about 10 minutes or so; -- Shiftworker?
  2. When the target reads "EMPTY and ready for beam", turn the pulse tube refrigerator OFF. -- Tim
  3. Text Chris Keith at 757-746-9277. -- Tim
    • Chris will come in and secure the system. That should require an access to the hall of only 5 minutes;
      • Ensure that both H2 tanks are valved off ?
      • Turn off the turbo station that is pumping on the OVC ?
      • Turn off the pulse tube compressor and kill power at the service disconnect ?

Solenoid

Intention is to keep magnet full and cold at 4k

  1. Solenoid is powered down -- Tim
  2. Cryogenics is secured for the shutdown -- Tim and Cryo

Mechanical

  1. Thin window guards
    1. Tagger window shutter lowered
    2. Reinstalled in Collimator Cave
    3. Reinstalled on Pair Spectrometer
    4. Reinstall on FCAL beampipe
  2. Vacuum (Valves closed and pumps off)
    1. Goniometer pump ON/OFF
    2. Tagger pump OFF
    3. Beam line valve VBV5H00 closed (and disconnected)
    4. Beam line pump from Tagger to Collimator Cave OFF
    5. Collimator Cave beam line under vacuum?
    6. Valve VBV5H03 CLOSED
    7. Pair Spectrometer pump OFF
    8. Solenoid and distribution box pumps OFF
    9. FCAL platform beam pipe vacuum status VACUUM/ATMOSPHERE?
  3. Cooling
    1. Fan on microscope ON/OFF
    2. BCAL Chillers OFF (drain and flush with nitrogen?)
    3. FDC Chiller OFF
    4. Blower CDC OFF
  4. Drift Chamber gas
    1. Lower gas flow
    2. Bypass alcohol bubbler
  5. Turn off Tagger NMR probe
  6. Make a log entry with status of windows, vacuum and cooling
  7. Ramp down Solenoid, Turn off Solenoid Power Supply and stop recording PXI data
  8. Ramp down pair spec magnet, turn off power supply.
  9. Ramp down sweep magnet, turn off power supply.
  10. Record status of this checklist into Logbook (HDLOG)


Electrical

Retract devices, Computers ON, DAQ Crates OFF, control crates ON

  1. Secure for shutdown
    1. Radiators retracted
    2. Profile monitor retracted
    3. Collimator in blocked position
    4. TPOL converter retracted
    5. PS convertor retracted
    6. COMPCAL retracted
    7. TAC retracted
  2. Magnet power supplies OFF
    1. Tagger (controlled by accelerator)
    2. Sweep
    3. PS
    4. Solenoid
  3. Detector Power Status: OFF
    1. BCAL (LV, bias)
    2. CDC (HV, LV)
    3. DIRC (Would prefer to keep full and flowing.)
    4. FCAL. [Note: Usually the Anagate supplies are left ON. But to turn off, first hit the crash button near the door, then power off the connection boxes (on the back) and the power strip on the front.]
    5. CCAL
    6. FDC (HV, LV)
    7. PS, PSC
    8. TAGH
    9. TAGM
    10. TOF
    11. ST (Bias, LV)
    12. Beam line Voltages (Active Target, TAC, halo)
    13. TPOL
  4. Keep Power ON
    1. All computers, switches, control modules
    2. Accelerator crates (US1-1, US1-2)
  5. Crate Power OFF
    1. DAQ crates: VXS, VME Hall D
    2. DAQ crates: VXS, VME Tagger building
  6. Record status in the Log book.