Measurements of edge plasma parameters during internal reconnection events in the TST-2 spherical tokamak

H. Furui, A. Ejiri, Y. Nagashima, Y. Takase, M. Sonehara, N. Tsujii, B. Roidl, T. Shinya, H. Togashi, H. Homma, K. Nakamura, T. Takeuchi, S. Yajima, Y. Yoshida, K. Toida, W. Takahashi, H. Yamazaki

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Abstract

Measurements of edge plasma parameters such as current density, electron density, and electron temperature were performed during internal reconnection events in TST-2 Ohmic plasmas. The measured current density consists of two components: a slowly varying component and a spiky bipolar component. The magnitude of the slowly varying component is comparable to the mean current density averaged over the poloidal cross section, and it seems to represent the global transport from the core to the edge. The spiky bipolar component is about an order of magnitude larger than the slowly varying component, but the spatial structure seems to be localized and its effect on plasma confinement is not catastrophic.

Original languageEnglish
Article number062504
JournalPhysics of Plasmas
Volume24
Issue number6
DOIs
Publication statusPublished - Jun 1 2017

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current density
plasma control
electron energy
cross sections

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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Measurements of edge plasma parameters during internal reconnection events in the TST-2 spherical tokamak. / Furui, H.; Ejiri, A.; Nagashima, Y.; Takase, Y.; Sonehara, M.; Tsujii, N.; Roidl, B.; Shinya, T.; Togashi, H.; Homma, H.; Nakamura, K.; Takeuchi, T.; Yajima, S.; Yoshida, Y.; Toida, K.; Takahashi, W.; Yamazaki, H.

In: Physics of Plasmas, Vol. 24, No. 6, 062504, 01.06.2017.

Research output: Contribution to journalArticle

Furui, H, Ejiri, A, Nagashima, Y, Takase, Y, Sonehara, M, Tsujii, N, Roidl, B, Shinya, T, Togashi, H, Homma, H, Nakamura, K, Takeuchi, T, Yajima, S, Yoshida, Y, Toida, K, Takahashi, W & Yamazaki, H 2017, 'Measurements of edge plasma parameters during internal reconnection events in the TST-2 spherical tokamak', Physics of Plasmas, vol. 24, no. 6, 062504. https://doi.org/10.1063/1.4985077
Furui, H. ; Ejiri, A. ; Nagashima, Y. ; Takase, Y. ; Sonehara, M. ; Tsujii, N. ; Roidl, B. ; Shinya, T. ; Togashi, H. ; Homma, H. ; Nakamura, K. ; Takeuchi, T. ; Yajima, S. ; Yoshida, Y. ; Toida, K. ; Takahashi, W. ; Yamazaki, H. / Measurements of edge plasma parameters during internal reconnection events in the TST-2 spherical tokamak. In: Physics of Plasmas. 2017 ; Vol. 24, No. 6.
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AU - Ejiri, A.

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AU - Takase, Y.

AU - Sonehara, M.

AU - Tsujii, N.

AU - Roidl, B.

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AU - Togashi, H.

AU - Homma, H.

AU - Nakamura, K.

AU - Takeuchi, T.

AU - Yajima, S.

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AU - Takahashi, W.

AU - Yamazaki, H.

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