Evacuate 1 K Pot

Now you are going to evacuate on the 1 K pot. Similar to the main bath (MB), you want to make sure there is no contamination left in there as you start to cool-down; otherwise, contaminants will freeze in the 1 K pot.

1. Make sure the speedivalve connected to the 1K pot is closed (should have already been closed from previous steps, but check nonetheless).
2. Make sure the He4 gas supply is off and the vent valve is closed.
3. Turn on He4 pump.
4. Open V5A, V2A, V4A (this pumps out leftover He4 gas in lines before we pump out 1K pot line).
5. Fully open 1 K pot Speedivalve and then close it.
6. Close V5A, V2A, V4A.