Need to quench a scanner now

[emammendes]

Hello

I have on old Oxford 4.7 T scanner that has been working since 2011. Unfortunately these last few days we could not transfer He in. Although our He liquefier is completely full and the transfer line is connect to the magnet, no He is transferred. The transfer line has been made vacuo efficient two months ago and should be ok.

It seems that we need to quench the magnet. We don't have any external power supply to connect to the magnet and retrieve the current.

What can we do? Is there any safety measures? Can we leave the magnet as it is? Should we evacuate the building? Should we isolate the area?

Thank you ever so much for your time and help.

I have contacted Oxford several times but they didn't return my emails.

Many thanks

Ed