Abstract

A field-reversed configuration (FRC) is a compact toroid predominantly with a poloidal magnetic field. Because of its simply-connected configuration, a FRC is able to be translated into, and trapping in a confinement chamber along an interconnecting guide magnetic field. In the most promising scenario of a FRC reactor, a FRC is first formed by the field-reversed theta-pinch (FRTP) method, then translated into a confinement region where it is heated by neutral beam injection (NBI) to reach a burning state. However, the usual arrangement of a FRTP-FRC does not achieve sufficient trapped flux to capture tangentially-injected fast NBI ions. To demonstrate additional heating and control methods a new FRC machine called FAT (FRC amplification via translation) has begun operations. FAT has a FRTP plasma source and a large-bore confinement chamber.

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