COLLIDING BEAM FUSION-REACTOR

Recent results with Tokamak experiments provide insights into the prob lem of magnetic confinement. They demonstrate how to avoid anomalous t ransport and thus solve the major problems of Tokamak reactors: size, the production of 14-megaelectron volt neutrons, and maintenance. An a lternate confinement system, the field-reversed configuration, confine s beams of protons and boron-11. For the proton-boron-11 fusion reacti on, the fusion products are all charged particles for which direct con version is feasible and neutron flux is negligible.