Plasma and Fusion Research

Volume 14, 3401077 (2019)

Regular Articles

FEM Simulation of Axisymmetric Pellet Injection System Using HTS Linear Acceleration
Teruou TAKAYAMA, Takazumi YAMAGUCHI, Ayumu SAITOH, Atsushi KAMITANI and Hiroaki NAKAMURA1)
Graduate School of Science and Engineering, Yamagata University, Yonezawa 992-8510, Japan
National Institute for Fusion Science, Toki 509-5292, Japan
(Received 24 December 2018 / Accepted 13 March 2019 / Published 25 April 2019)


The acceleration performance of the pellet injection system used in a superconducting linear acceleration to fuel the nuclear fusion reactor has been investigated numerically. To this end, the numerical model has been developed for analyzing the shielding current density in a high-temperature superconducting (HTS) film by using the finite element method. By using the code, the pellet injection system has been simulated. The results of the computations show that, for the single acceleration coil, the final velocity increases almost in proportion to the height of the coil. For the multiple coils, the pellet container can be accelerated to 5 km/s or more by about 6.87 seconds. Consequently, the length of the electromagnetic rails for a single coil becomes shorter than that for the multiple coils.


accelerator magnet, finite element analysis, linear accelerator, nuclear fuel, thin film

DOI: 10.1585/pfr.14.3401077


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