Noun
container consisting of any configuration of magnetic fields used to contain a plasma during controlled thermonuclear reactions
Source: WordNetMagnetic bottles This image shows how a charged particle will corkscrew along the magnetic fields inside a magnetic bottle, which is two magnetic mirrors placed close together. Source: Internet
A magnetic bottle is two magnetic mirrors placed close together. Source: Internet
For example, two parallel coils separated by a small distance, carrying the same current in the same direction will produce a magnetic bottle between them. Source: Internet