2003•プラズマ・核融合学会誌Open access

MHD Simulation of Current Drive by Repetitive Plasmoid Injection in Helicity-Driven Spheromaks.

Yasuhiro Kagei, Masayoshi Nagata, Yoshio Suzuki, Yasuaki Kishimoto, 忠男宇山

Abstract

The dynamics of spheromak plasmas in coaxial helicity injection (CHI) systems has been investigated using three-dimensional magnetohydrodynamic (MHD) numerical simulations. It was found that toroidal current is driven by repetitive asymmetric plasmoid injection, which is related to the n = 1 oscillations. In addition, we propose that multiple pulse operation of the helicity injection is effective for improving confinement because it reduces the n = 1 fluctuations.

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Key concepts: Plasmoid, Spheromak, Helicity, Magnetohydrodynamics, Magnetohydrodynamic drive, Physics, Coaxial, Toroid