What is Tokamak?

and Tokamak is a toroidal (dough) magnetic plasma retaining device, a leading candidate for energy production of magnetic fusion. The term Tokamak comes from Russian words: "toroidalnaya", "camera" and "magnitnaya", which mean "toroidal, chamber, magnetic". The last letter g has been replaced to prevent analogy of magic. This was invented in the 1950s Igor Yevgenyevich Tamm and Andrei Sakharov. This can be compared with another toroidal magnetic retention device, a star star in which all limiting magnetic fields are produced by external coils and there is a negligible current flowing through plasma. Essentialy problem is a furry sentence about a ball. If the ball grows out of the hair, it is impossible to comb it so that no hair does not stick. However, the hairy donut can be so combat.

This is important because the fusion reactor is a hairy donut, while the hair is the line of magnetia bunch of fields. The hair that stands at the end would be instability in the reactor.