[Hallb-engineering] torus cooldown
kashy at jlab.org
Fri Nov 19 14:48:12 EST 2010
The Torus and Buffer dewar have been cooled. It went quite well.
Please check for dripping water in the hall as the cooldown lines warm
up. They should be melting now as we are fully on cold return for both
Also we need to check the final flows once the system has stabilized
because I'm not convinced the distribution vacuums are as good as they
were in the past...
Cryo is using our pressure sensor PI1028 to control the back pressure
regulation valve EV6721B to keep constant back pressure. At present this
signal is very noisy. Hopefully it will stabilize when the magnet is
full of liquid. Please keep an eye on this too. We may need to find a spare.
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