Electron acceleration by magnetic reconnection during spherical tokamak merging experiment

Shuji Kamio, Kotaro Yamasaki, Koichiro Takemura, Qinghong Cao, Takenori G. Watanabe, Hirotomo Itagaki, Toshiki Tsutsui, Koji Ishiguchi, Ryota Imazawa, Takuma Yamada, Chio Zong Cheng, Michiaki Inomoto, Yuichi Takase, Yasushi Ono

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Electron acceleration in magnetic reconnection event has been experimentally investigated using the plasma merging technique in the University of Tokyo Spherical Tokamak (UTST) device. Intense emission of He II line (468.58 nm) was observed only in the vicinity of the X-point by using a multi-channel spectroscopic measurement system. This localized emission indicates the generation of energetic electrons inside the current sheet region, possibly due to the electron acceleration by the strong toroidal electric field induced by magnetic reconnection in the presence of a guide field.

Original languageEnglish
Pages (from-to)166-172
Number of pages7
JournalIEEJ Transactions on Fundamentals and Materials
Issue number4
Publication statusPublished - 2013 May 10


All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Kamio, S., Yamasaki, K., Takemura, K., Cao, Q., Watanabe, T. G., Itagaki, H., ... Ono, Y. (2013). Electron acceleration by magnetic reconnection during spherical tokamak merging experiment. IEEJ Transactions on Fundamentals and Materials, 133(4), 166-172. https://doi.org/10.1541/ieejfms.133.166