Plasmoid

Plasmoids produced in the laboratory include the compact toroids (similar to a vortex ring in low temperature fluid dynamics or hydrodynamics) field-reversed configurations, spheromaks, and filamentary variants in dense plasma focuses.

The word plasmoid was coined in 1956 by Winston H. Bostick (1916–1991) to mean a "plasma-magnetic entity":[8] The plasma is emitted not as an amorphous blob, but in the form of a torus.

We shall take the liberty of calling this toroidal structure a plasmoid, a word which means plasma-magnetic entity.

Plasmoids can be made to spiral to a stop if projected into a gas at about 10−3 mm Hg pressure.

Plasmoids have been formed in discharges with local magnetic field strengths on the order of 16,000 Tesla.