Generation of energetic electrons during spherical tokamak merging in UTST

Tomohiko Ushiki, Michiaki Inomoto, Kotaro Yamasaki, Xuehan Guo, Takumichi Sugawara, Keita Matsuyama, Haruhisa Koguchi, Takuma Yamada

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4 Citations (Scopus)

Abstract

Bursts of bremsstrahlung soft X-ray (SXR) emission ( > 200 eV) were observed during spherical tokamak merging in the University of Tokyo Spherical Tokamak (UTST) experiment. SXR signal waveforms coincided well with the time evolution of a reconnection electric field, and their intensity shows a clear dependence on the strength of a toroidal magnetic field. This result suggests that electrons near the X-point are effectively accelerated in the toroidal direction by a parallel electric field during plasma merging in the presence of a strong toroidal magnetic field.

Original languageEnglish
Article number2402100
JournalPlasma and Fusion Research
Volume11
Issue number1
DOIs
Publication statusPublished - 2016

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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  • Cite this

    Ushiki, T., Inomoto, M., Yamasaki, K., Guo, X., Sugawara, T., Matsuyama, K., Koguchi, H., & Yamada, T. (2016). Generation of energetic electrons during spherical tokamak merging in UTST. Plasma and Fusion Research, 11(1), [2402100]. https://doi.org/10.1585/pfr.11.2402100