Experimental evidence for super-Alfvénic acceleration of the field-reversed configuration due to a magnetic pressure gradient

Daichi Kobayashi, Tomohiko Asai

研究成果: ジャーナルへの寄稿記事査読

22 被引用数 (Scopus)

抄録

The super-Alfvénic acceleration of an extremely high beta plasmoid due to a magnetic pressure gradient is evidenced in translation experiments involving the field-reversed configuration (FRC) in the FRC amplification via the translation-collisional merging (FAT-CM) device. Inside the FRC, there is a population of unmagnetized particles that forms a volume with extremely high beta. Formed using the field-reversed theta pinch method, the FRC is accelerated and injected into a quasi-static confinement magnetic field that is weaker than the formation and acceleration fields. Because the FRC is injected with nonzero axial translation speed and cannot slow down, its speed exceeds the Alfvénic and sonic speed upon entering the confinement field. This phenomenon is predicted from two-dimensional resistive magnetohydrodynamic simulations, and experimental results that are consistent with the magnetohydrodynamic approximation show that the FRC acceleration process is due mainly to magnetic pressure on the thin magnetized layer.

本文言語英語
論文番号022101
ジャーナルPhysics of Plasmas
28
2
DOI
出版ステータス出版済み - 1 2月 2021

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