1992 年 61 巻 6 号 p. 1844-1847
The toroidal plasma current is enhanced by means of plasmoid injection in toroidal Z pinch experiments. Increment of the toroidal current increases with total energy of the plasmoid, but does not depend much on the initial toroidal current. The conversion rate from plasmoid energy to electric energy is evaluated to be roughly 40%. Simple theoretical interpretation indicates that the toroidal current is enhanced through a physical process similar to that in spontaneous generation of the toroidal flux.