The was a small leak of helium within the instrument. Such incidents are completely unexceptional with superconducting magnets, and pose no risk to anyone outsi

The was a small leak of helium within the instrument. Such incidents are completely unexceptional with superconducting magnets, and pose no risk to anyone outside the room where it happen, since both helium and nitrogen are about as inert as gases can get. I suspect it wouldn’t even have made the news if it hadn’t delayed the experiments.