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1. Cover the IGRINS entrance window
   1. If the calibration unit is still on the cryostat, close the calibration unit slide window
   2. Otherwise, place the metal cover over the cryostat entrance window
2. On the ICC shutdown the DTP, QLP, and SCP. It is useful to keep the HKP running for temperature monitoring and logging.
   
   
3. Home the calibration motors:
   1. Open a terminal window and type “cd ~/igrins_admin”
   2. Close the HKP
   3. Type “python mtini.py”, it will ask to close HKP. 
   4. Follow the commands of that program to home each motor
   5. Restart the HKP after completion
   6. to home the motors (select "0" to initialize then "5" to exit).
   
   
4. Detector Shutdown:
   1. Using “Remote Desktop Connection” log onto each of the three detector computers to shutdown the detectors and Jade2 cards.
      1. IP Addresses for each computer are listed here:
         1. SVC: 192.168.2.4
         2. H: 192.168.2.5
         3. K: 192.168.2.6
      2. When logged into Windows navigate to the “HXRG Testing Software” window.
      3. In the top left panel, press the “RESET ASIC” button. This will grey out most of the other options on the panel.
      4. In the top left panel, uncheck the “ASIC Main Power” box to power down the detector.
      5. Close the “HXRG Testing Software” window
      6. Navigate to the “HalServiceApp” window.
      7. Press the “Stop” button.
      8. Close the “HalServiceApp” window.
      9. Using the Windows Start menu shut down the computer. Answer the question regarding shutdown.
   
   
5. Computer Shutdown:
   1. The IGRINS DSC will normally be left running at all times, but if you need to shut it down:
      1. On the ICC, open a “Remote Desktop Connection” to 192.168.2.1
      2. Once logged into the DSC, shut down the DSC with the normal Mac OSX shutdown command.
   2. Unless necessary, leave the ICC and HKP running to maintain temperature logging during warmup. Otherwise, shutdown the ICC using the normal Mac OSX shutdown command
   
   
6. Instrument Disconnect:
   1. Turn off the helium compressor by flipping the white and yellow switches to the off position. This will stop cooling IGRINS.
   2. Wait at least one minute to release latent heat from the helium and then turn off the recirculating water chiller and the coolant booster pump.
   3. Remove the He flex lines and cover the ends with dust caps.
   4. Remove all electrical connections from the calibration unit
   1. 1. Three Ethernet motor controllers
      2. Two locking power cables
      3. One locking circular connector
      
      
   2. MAKE SURE THAT THE JADE2 CARDS HAVE BEEN TURNED OFF IN SOFTWARE BEFORE PROCEEDING!

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1. 1. Remove the Ethernet and power cables from each of the Jade2 cards.

12. Remove the helium flex lines and refrigerator power cable from IGRINS, place dust caps on the ends of each helium line fixture

13. Wait for IGRINS to warm to room temperature

1. If you passively let IGRINS warm to room temperature, this takes about 40 hours.
2. You can decrease the warm time by using the heater ramp function on the bench heaters only.
3. DO NOT APPLY RAMP HEATING TO THE DETECTORS!
4. To further decrease the warming time, you can backfill the dewar with dry nitrogen, but this is not recommended.

14. When all of the internal temperature sensors are approximately at room temperature you can gently release the vacuum using the valve.

1. Remove the plastic dust cap from the vacuum valve flange
2. Place clean tissues in front of the flange to filter out dust
3. Release the lock on the red valve handle by turning it CCW
4. Gently open the valve by turning it CCW. You will begin to hear air entering the cryostat. Try to limit the airflow to prevent damage to internal components
5. In general, keeping the backfill noise at the same volume as a whisper will prevent damage.
6. When the cryostat is backfilled, fully open the vacuum valve and replace the plastic dust cover.

15. Remove the pressure sensor cable

16. Remove the three temperature sensor/heater circular cables labeled A, B, and C from the cryostat.

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1. 1. Turn off the main power to the electronics box and secure all remaining cables to the box.

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1. 1. Remove the orange IGRINS fiber connection from the network switch in the electronics box.

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1. 1. The calibration unit may be removed or left on the cryostat at this time.
      
   
   
2. The shutdown procedure is now complete and IGRINS can be stored. Refer to the other notes on opening in the lab and transport.