Generation of Energetic Electrons during Spherical Tokamak Merging in UTST

Generation of Energetic Electrons during Spherical Tokamak Merging in UTST

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 cle...

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Veröffentlicht in:Plasma and Fusion Research 2016/07/15, Vol.11, pp.2402100-2402100
Hauptverfasser: USHIKI, Tomohiko, INOMOTO, Michiaki, YAMASAKI, Kotaro, GUO, Xuehan, SUGAWARA, Takumichi, MATSUYAMA, Keita, KOGUCHI, Haruhisa, YAMADA, Takuma
Format: Artikel
Sprache:eng
Schlagworte:
Bremsstrahlung
Electric fields
Electrons
energetic electron
Magnetic fields
magnetic reconnection
Magnetism
Plasma
plasma merging
Soft x rays
spherical tokamak
Tokamak devices
Waveforms
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Zusammenfassung: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.
ISSN:1880-6821
1880-6821
DOI:10.1585/pfr.11.2402100