Plasma and Fusion Research

Volume 17, 2402068 (2022)

Regular Articles

Effect of Collision Axes Offset of the Plasmoid in the Collisional Merging Process of FRC Plasma
Hiroki SOMEYA, Tomohiko ASAI, Daichi KOBAYASHI, Taichi SEKI, Takuto YAMANAKA, Tatsuhiro WATANABE, Tsutomu TAKAHASHI and Naoki MIZUGUCHI1)
College of Science and Technology, Nihon University, Tokyo 101-8308, Japan
1)
National Institute for Fusion Science, Toki 509-5292, Japan
(Received 10 January 2022 / Accepted 5 April 2022 / Published 6 June 2022)

Abstract

In this study, the effect of the collision axes offset in the collisional merging process of field-reversed configuration (FRC) in the FAT-CM (FRC amplification via translation-collisional merging) device was experimentally investigated for the first time. The offset of incident axes during collision does not exhibit any considerable effect on particle inventory and trapped magnetic flux of the merged FRC, which is inconsistent with the results predicted via the three-dimensional magnetohydrodynamic (MHD) simulation using the MHD infrastructure for plasma simulation (MIPS) code. Based on the obtained results, the FRC exhibits robust stability and it does not collapse even when subjected to destructive perturbations during the dynamic translation and collision processes.

Keywords

field-reversed configuration, three-dimensional magnetohydrodynamic simulation, offset

DOI: 10.1585/pfr.17.2402068

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