A magnetic trap captures elusive ultracold plasma

Cold plasma is squirrely, but researchers found a new way to hold it in place for a bit

researcher working on laser-cooled plasma experiment

Using magnets, physicists can pin a laser-cooled plasma (experiment shown) in one place for up to half a millisecond — about 10 times longer than it would otherwise last.

Jeff Fitlow/Rice University

In terms of difficulty, trapping a plasma is right up there with catching a cloud and pinning it down, or holding a moonbeam in your hand.