Development of Target Injection System by Using Electromagnetic Coils

In this paper, we propose a fuel target injection method using electromagnetic coils for fusion power reactors. When a current pulse is applied to the coil, the iron sabot is attracted by electromagnetic force and enters the coil. As the current pulse attenuates, the magnetic force dissipates, and the iron sabot is propelled out of the coil due to inertia. The fuel target is separated from the iron sabot by a sabot separator consisting of ring-shaped permanent magnets. It is found that the velocity of the injected target increased to some extent by increasing the number of coil turns. It has been demonstrated that multi-stage acceleration using multiple coils is effective for increasing the velocity of the injected target.