- NEGATIVE ION-BASED NEUTRAL BEAM INJECTOR

摘要

The negative ion-based neutral beam injector includes an negative ion source, an accelerator, and a neutralizer to generate an approximately 5 MW neutral beam having an energy of approximately 0.50 to 1.0 eV. The ions produced by the ion source are extracted by an electrostatic multi-hole grid pre-accelerator, which is used to extract the ion beam from the plasma and accelerate it to a fraction of the required beam energy prior to incidence into the high energy accelerator. Pre-accelerated. The beam from the ion source passes through a pair of deflecting magnets that allow the beam to shift out of the axis before entering the high energy accelerator. After acceleration to maximum energy, the beam enters the neutralizer where the beam is partially converted to a neutral beam. The remaining ionic species are separated by the magnet and also directed into the electrostatic energy converter. The neutral beam passes through the gate valve and enters the plasma chamber.