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

doi:10.1585/pfr.11.2402100

Regular Articles

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

著者情報

キーワード: spherical tokamak, plasma merging, energetic electron, magnetic reconnection

ジャーナルフリー

2016 年 11 巻 p. 2402100

DOI https://doi.org/10.1585/pfr.11.2402100

詳細

抄録

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.

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