Dear all,
So far I have received about a dozen responses. I still don’t know exactly what caused the noise; however, I have got what I want. I worried much about our whistling magnet before (I described this as hissing in my previous post, due to my English limitation), but now I feel relieved, because three other ammrl members have had the similar experience with the Magnex magnets during LHe refilling. I would take this whistling as normal right now. Thank you very much for your inputs.
Guangyu
Received on Mon Feb 17 2014 - 22:25:32 MST