A Neutral-Beam Injector for the Tandem-Mirror Fusion Reactor Delivering 147 MW of 1.2-MeV D°

A conceptual design of a high-current, 1.2-MeV Do injector is presented. This injector has an anticipated operating efficiency of 73%. Major advances in beam technology are needed to meet these specifications, including a continuous source of negative ions, an efficient electron-stripping cell, and the development of associated power conditioning and control equipment. All components in the proposed beam line are elaborations of physics experiments already reported in the literature; therefore, it should be possible to satisfy the neutral-beam requirements of the tandem-mirror reactor (TMR) in the not too distant future.