Electron density measurements of non-inductive start-up plasmas in the TST-2 spherical tokamak

Hiroki Kurashina; Akira Ejiri; Yuichi Takase; Kentaro Hanashima; Takuya Sakamoto; Osamu Watanabe; Yoshihiko Nagashima; Takashi Yamaguchi; Byung Il An; Hiroaki Kobayashi; Hiroyuki Hayashi; Kotaro Yamada; Hazuki Matsuzawa; Hidetoshi Kakuda; Junichi Hiratsuka; Takuma Wakatsuki; Takuya Oosako

doi:10.1585/pfr.5.024

Electron density measurements of non-inductive start-up plasmas in the TST-2 spherical tokamak

Hiroki Kurashina, Akira Ejiri, Yuichi Takase, Kentaro Hanashima, Takuya Sakamoto, Osamu Watanabe, Yoshihiko Nagashima, Takashi Yamaguchi, Byung Il An, Hiroaki Kobayashi, Hiroyuki Hayashi, Kotaro Yamada, Hazuki Matsuzawa, Hidetoshi Kakuda, Junichi Hiratsuka, Takuma Wakatsuki, Takuya Oosako

Research output: Contribution to journal › Article › peer-review

Abstract

A new 50 GHz microwave interferometer was installed, and non-inductively sustained spherical tokamak plasmas in the TST-2 device were measured. The line integrated electron densities (nels) on five chords were compared with visible CCD camera image and equilibrium analysis. It is concluded that the high-density region has a C-like shape along the outboard boundary. This shape suggests that the electron density is not constant on the magnetic flux surface.

Original language	English
Article number	024
Journal	Plasma and Fusion Research
Volume	5
DOIs	https://doi.org/10.1585/pfr.5.024
Publication status	Published - 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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Kurashina, H., Ejiri, A., Takase, Y., Hanashima, K., Sakamoto, T., Watanabe, O., Nagashima, Y., Yamaguchi, T., An, B. I., Kobayashi, H., Hayashi, H., Yamada, K., Matsuzawa, H., Kakuda, H., Hiratsuka, J., Wakatsuki, T., & Oosako, T. (2010). Electron density measurements of non-inductive start-up plasmas in the TST-2 spherical tokamak. Plasma and Fusion Research, 5, [024]. https://doi.org/10.1585/pfr.5.024

Electron density measurements of non-inductive start-up plasmas in the TST-2 spherical tokamak. / Kurashina, Hiroki; Ejiri, Akira; Takase, Yuichi; Hanashima, Kentaro; Sakamoto, Takuya; Watanabe, Osamu; Nagashima, Yoshihiko; Yamaguchi, Takashi; An, Byung Il; Kobayashi, Hiroaki; Hayashi, Hiroyuki; Yamada, Kotaro; Matsuzawa, Hazuki; Kakuda, Hidetoshi; Hiratsuka, Junichi; Wakatsuki, Takuma; Oosako, Takuya.

In: Plasma and Fusion Research, Vol. 5, 024, 2010.

Research output: Contribution to journal › Article › peer-review

Kurashina, H, Ejiri, A, Takase, Y, Hanashima, K, Sakamoto, T, Watanabe, O, Nagashima, Y, Yamaguchi, T, An, BI, Kobayashi, H, Hayashi, H, Yamada, K, Matsuzawa, H, Kakuda, H, Hiratsuka, J, Wakatsuki, T & Oosako, T 2010, 'Electron density measurements of non-inductive start-up plasmas in the TST-2 spherical tokamak', Plasma and Fusion Research, vol. 5, 024. https://doi.org/10.1585/pfr.5.024

Kurashina, Hiroki ; Ejiri, Akira ; Takase, Yuichi ; Hanashima, Kentaro ; Sakamoto, Takuya ; Watanabe, Osamu ; Nagashima, Yoshihiko ; Yamaguchi, Takashi ; An, Byung Il ; Kobayashi, Hiroaki ; Hayashi, Hiroyuki ; Yamada, Kotaro ; Matsuzawa, Hazuki ; Kakuda, Hidetoshi ; Hiratsuka, Junichi ; Wakatsuki, Takuma ; Oosako, Takuya. / Electron density measurements of non-inductive start-up plasmas in the TST-2 spherical tokamak. In: Plasma and Fusion Research. 2010 ; Vol. 5.

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abstract = "A new 50 GHz microwave interferometer was installed, and non-inductively sustained spherical tokamak plasmas in the TST-2 device were measured. The line integrated electron densities (nels) on five chords were compared with visible CCD camera image and equilibrium analysis. It is concluded that the high-density region has a C-like shape along the outboard boundary. This shape suggests that the electron density is not constant on the magnetic flux surface.",

author = "Hiroki Kurashina and Akira Ejiri and Yuichi Takase and Kentaro Hanashima and Takuya Sakamoto and Osamu Watanabe and Yoshihiko Nagashima and Takashi Yamaguchi and An, {Byung Il} and Hiroaki Kobayashi and Hiroyuki Hayashi and Kotaro Yamada and Hazuki Matsuzawa and Hidetoshi Kakuda and Junichi Hiratsuka and Takuma Wakatsuki and Takuya Oosako",

note = "Funding Information: This work was supported by Grants-in-Aid for Scientific Research (S) (21226021) and for Scientific Research (A) (21246137) of JSPS, Japan",

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doi = "10.1585/pfr.5.024",

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T1 - Electron density measurements of non-inductive start-up plasmas in the TST-2 spherical tokamak

AU - Kurashina, Hiroki

AU - Ejiri, Akira

AU - Takase, Yuichi

AU - Hanashima, Kentaro

AU - Sakamoto, Takuya

AU - Watanabe, Osamu

AU - Nagashima, Yoshihiko

AU - Yamaguchi, Takashi

AU - An, Byung Il

AU - Kobayashi, Hiroaki

AU - Hayashi, Hiroyuki

AU - Yamada, Kotaro

AU - Matsuzawa, Hazuki

AU - Kakuda, Hidetoshi

AU - Hiratsuka, Junichi

AU - Wakatsuki, Takuma

AU - Oosako, Takuya

N1 - Funding Information: This work was supported by Grants-in-Aid for Scientific Research (S) (21226021) and for Scientific Research (A) (21246137) of JSPS, Japan

PY - 2010

Y1 - 2010

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AB - A new 50 GHz microwave interferometer was installed, and non-inductively sustained spherical tokamak plasmas in the TST-2 device were measured. The line integrated electron densities (nels) on five chords were compared with visible CCD camera image and equilibrium analysis. It is concluded that the high-density region has a C-like shape along the outboard boundary. This shape suggests that the electron density is not constant on the magnetic flux surface.

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