Numerical Investigation on Superconducting Linear Acceleration System for Pellet Injection by Using Equivalent-Circuit Model

According to a rough estimation, a superconducting linear acceleration (SLA) system might be able to inject a fuel pellet into a core plasma. However, as the consequences of numerical simulations, it was found that the SLA system with only one electromagnet cannot inject the pellet into the core plasma. Therefore, the multiple electromagnets must be used in order to improve the acceleration performance of the SLA system. In this paper, the SLA system with the multiple electromagnets is numerically investigated by using an equivalent-circuit model (ECM). The ECM is composed of a set of ring-shaped electric wires and the multiple electromagnets. According to the numerical investigation, it was found that the ECM is a tool for investigating the SLA system instead of a finite-element method. In addition, the SLA system with the multiple electromagnets has the same acceleration performance as the conventional pellet injection system.