Fission of a Hot Plasma

It has been observed that the plasma formed in a fast $B_z$ compression develops an instability after about a 4- to 5-μsec quiescent period. The consequence of the instability is that the plasma fissions into two well-defined filaments that rotate with an angular velocity $\Omega \sim {10}^7$ ${\sec }^{-1\mathrm{}}$. This configuration has been observed for many rotational periods. The plasma appears to remain confined although impurity radiation indicates that some plasma reaches the walls during the fission process. The fission process in a deuterium plasma is accompanied by a rapid decline in neutron production. The origin of the rotation and the development of the instability are discussed.