1. If radioactive beam is off follow steps 9 through 19 and 25, otherwise follow steps 2 through 25

   Safety Note: You need to take the TRIUMF cryogenics training before handling LN2. Check with your supervisor if you do not have the required training.

   Safety Note: Do not wear sandals or open-toed footwear while filling detector

   Access

2. Contact controllers (Ext. 7500), and let them know you intend to access DRAGON

3. When entering DRAGON area, access the transfer lock on your left at the entrance to the facility and make sure the "Ok to release key" LED is illuminated. If it is not illuminated contact ISAC operations who will establish proper conditions (Ext. 7500)

4. Press the "push to release key" button when the LED is on

5. The key is now released for 5 seconds and the "key released" LED should be illuminated

6. When the key is released turn it counterclockwise and removed from the ASU box

7. Insert the key into the transfer lock (bottom lock) and turn clockwise to release all DRAGON keys

8. Remove the key for ED1 West and unlock the corresponding gate to gain access to the Germanium detector

   Filling Germanium Detector

   
9. Check the last time the detector was filled (if it has been un-attended for more than one day it will require significantly more liquid Nitrogen to fill)

10. Remove the lid and place the plastic funnel in the opening (should be nearby)

11. Proceed to DRAGON gas target dewer and put on gloves and face shield (should be nearby)

12. Place available thermos or liquid nitrogen transport device under the tap, which is beneath the red handle.
    

13. Pull up handle slowly and allow nitrogen gas to fill and cool the tubing (with the thermos in place).

14. Once liquid nitrogen is coming out of tap instead of gas increase flow as you feel comfortable and fill available flask. You can usually tell that you have liquid instead of gas as there is far less visible gas flying around.

15. Once the flask is full turn off the liquid nitrogen supply and carry the nitrogen over to the detector.

16. Pour the nitrogen into the funnel trying to pour directly into the center to avoid damaging the funnel.

    Safety Note: Ensure gloves and face shield are on for step 17

17. After each filling use the detection rod nearby. This is a piece of metal approximately 40 cm in length with a red end cap. Lower the end without the red cap into the tank until the tape marking is level with the top of the dewer. If you see nitrogen emerging from the top of the rod (it will be obvious) then the detector is full enough.

18. Continue to add nitrogen until the rod indicates that the detector is full enough.

19. Remove the funnel and place cap back on detector.

20. Record the date and time of filling as well as your name on the "Filling Sheet" attached to the detector.

    Lockup

21. Ensure no one is inside the confines of the fence and lock the ED1 West gate.

22. Insert the gate key back into its corresponding place in the transfer lock and turn it clockwise.

23. Remove the DRAGON ASU key from the transfer lock and insert it back into the ASU release unit and turn it clockwise until the key is trapped.

24. "DRAGON Locked" signal is now sent to controller which will allow for delivery of RIB.

    Finish

25. Remember to record that you've filled the detector in the counting room (date, time and name).

Updated 26/April/2019
Annika Lennarz