Numerical Investigations on Enhanced-Performance Superconducting Linear Acceleration System for Pellet Injection

Improvement of the achievable speed of the pellet container in the superconducting linear acceleration (SLA) system has been investigated numerically. To this end, a numerical code has been developed for analyzing the shielding current density in a high-temperature superconducting film. Moreover, another coil is placed on the outside of the conventional one. The results of computations show that the acceleration time of the SLA system is 2.1 s, and this time becomes shorter 5.7 s as compared to the only use of the conventional coil. In addition, it is found that the distance of electromagnetic rails is reduced to 1/3 or less compared with the numerical results of the previous study. However, we found that even this value is too long. We conclude that it is necessary to make the shape of the rail not straight but circular. Furthermore, our study also needs to be discussed in the circular shape of electromagnetic rails.