Abstract
The US. fusion power development program is aimed at the first significant production of fusion power on an experimental scale in the early 1980's, and at a demonstration of the commercial production of fusion power between 1995 and 1997, according to a status report by Robert L. Hirsch.1 In order to achieve this god, four major concepts are being pursued in the U.S. at this time. Three concepts use magnetic fields to confine a plasma for either pulsed or steady-state operation: the tokamak, theta-pinch, and mirror devices. The fourth concept is laser fusion, which utilizes inertia to hold a plasma for a very short period of time (−9 sec).