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No more He in Mono Hutch - What to do ?

last modified 04-09-2008 09:32

In the Monochromator hutch:


We use a liquid He vessel to have He flux in Mono chamber		He Level in Mono Hutch - Visualization on Monitor in Control Room

Ball must be between 2 marks
Ball down means there is NO MORE He in Mono chamber. Stop immediately the beam! Danger for Be window !!!!

To change He bottle:

1) First thing to do: Close mechanical valve 0 in Experimental hutch		2) Close mechanical valve 1 in Mono hutch

3) Close mechanical valve 3 in Mono hutch		4) You are ready to pump Mono chamber
		Connect pumping group to Mono chamber
5) Verify that Mono Hutch Electronic Valves are open		6) Open completely mechanical valve 2 in Mono hutch to pump the whole chamber
Image 'vacuum synopsis'
7) Call Floor coordinator (25-25) to get a new liquid He bottle Connect it - Note new date on camera field of view 9) Close mechanical valve 2 - Stop pumping 11) Do not forget to reopen mechanical valve 0 in Experimental Hutch before working		8) Check vacuum state on jauge 10) Open mechanical valve 1, then 3 He surpression must go up the ball