Development of a local current diagnostic using a small Rogowski coil for a spherical tokamak plasma in TST-2

Hirokazu Furui; Yoshihiko Nagashima; Yuich Takase; Akira Ejiri; Hidetoshi Kakuda; Masateru Sonehara; Takuya Oosako; Naoto Tsujii; Junichi Hiratsuka; Kazuhiro Imamura; Takuma Inada; Keishun Nakamura; Ayaka Nakanishi; Takahiro Shinya; Hiro Togashi; Shintarou Tsuda; Takuma Wakatsuki; Takashi Yamaguchi

doi:10.1585/pfr.9.3402078

Development of a local current diagnostic using a small Rogowski coil for a spherical tokamak plasma in TST-2

Hirokazu Furui, Yoshihiko Nagashima, Yuich Takase, Akira Ejiri, Hidetoshi Kakuda, Masateru Sonehara, Takuya Oosako, Naoto Tsujii, Junichi Hiratsuka, Kazuhiro Imamura, Takuma Inada, Keishun Nakamura, Ayaka Nakanishi, Takahiro Shinya, Hiro Togashi, Shintarou Tsuda, Takuma Wakatsuki, Takashi Yamaguchi

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Abstract

A local current diagnostic using a small Rogowski coil was developed in the TST-2 spherical tokamak device (R = 0.38 m, a = 0.25 m, Bt = 0.3 T, Ip = 0.1 MA). A Rogowski coil is a cost effective tool for local current diagnostic that can detect the current signal directly. A new small Rogowski coil (outer diameter = 20 mm, inner diameter = 12 mm, number of turns = 360) with small sensitivity to external magnetic fields, such as Bt and Bp, was developed and successfully installed in the TST-2. The measured local current at the edge just inside the last closed flux surface for ohmic heating was about 15 A.

Original language	English
Article number	3402078
Journal	Plasma and Fusion Research
Volume	9
Issue number	SpecialIssue2
DOIs	https://doi.org/10.1585/pfr.9.3402078
Publication status	Published - 2014

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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Furui, H., Nagashima, Y., Takase, Y., Ejiri, A., Kakuda, H., Sonehara, M., Oosako, T., Tsujii, N., Hiratsuka, J., Imamura, K., Inada, T., Nakamura, K., Nakanishi, A., Shinya, T., Togashi, H., Tsuda, S., Wakatsuki, T., & Yamaguchi, T. (2014). Development of a local current diagnostic using a small Rogowski coil for a spherical tokamak plasma in TST-2. Plasma and Fusion Research, 9(SpecialIssue2), Article 3402078. https://doi.org/10.1585/pfr.9.3402078

Furui, H, Nagashima, Y, Takase, Y, Ejiri, A, Kakuda, H, Sonehara, M, Oosako, T, Tsujii, N, Hiratsuka, J, Imamura, K, Inada, T, Nakamura, K, Nakanishi, A, Shinya, T, Togashi, H, Tsuda, S, Wakatsuki, T & Yamaguchi, T 2014, 'Development of a local current diagnostic using a small Rogowski coil for a spherical tokamak plasma in TST-2', Plasma and Fusion Research, vol. 9, no. SpecialIssue2, 3402078. https://doi.org/10.1585/pfr.9.3402078

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title = "Development of a local current diagnostic using a small Rogowski coil for a spherical tokamak plasma in TST-2",

abstract = "A local current diagnostic using a small Rogowski coil was developed in the TST-2 spherical tokamak device (R = 0.38 m, a = 0.25 m, Bt = 0.3 T, Ip = 0.1 MA). A Rogowski coil is a cost effective tool for local current diagnostic that can detect the current signal directly. A new small Rogowski coil (outer diameter = 20 mm, inner diameter = 12 mm, number of turns = 360) with small sensitivity to external magnetic fields, such as Bt and Bp, was developed and successfully installed in the TST-2. The measured local current at the edge just inside the last closed flux surface for ohmic heating was about 15 A.",

author = "Hirokazu Furui and Yoshihiko Nagashima and Yuich Takase and Akira Ejiri and Hidetoshi Kakuda and Masateru Sonehara and Takuya Oosako and Naoto Tsujii and Junichi Hiratsuka and Kazuhiro Imamura and Takuma Inada and Keishun Nakamura and Ayaka Nakanishi and Takahiro Shinya and Hiro Togashi and Shintarou Tsuda and Takuma Wakatsuki and Takashi Yamaguchi",

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doi = "10.1585/pfr.9.3402078",

language = "English",

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AU - Furui, Hirokazu

AU - Nagashima, Yoshihiko

AU - Takase, Yuich

AU - Ejiri, Akira

AU - Kakuda, Hidetoshi

AU - Sonehara, Masateru

AU - Oosako, Takuya

AU - Tsujii, Naoto

AU - Hiratsuka, Junichi

AU - Imamura, Kazuhiro

AU - Inada, Takuma

AU - Nakamura, Keishun

AU - Nakanishi, Ayaka

AU - Shinya, Takahiro

AU - Togashi, Hiro

AU - Tsuda, Shintarou

AU - Wakatsuki, Takuma

AU - Yamaguchi, Takashi

PY - 2014

Y1 - 2014

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AB - A local current diagnostic using a small Rogowski coil was developed in the TST-2 spherical tokamak device (R = 0.38 m, a = 0.25 m, Bt = 0.3 T, Ip = 0.1 MA). A Rogowski coil is a cost effective tool for local current diagnostic that can detect the current signal directly. A new small Rogowski coil (outer diameter = 20 mm, inner diameter = 12 mm, number of turns = 360) with small sensitivity to external magnetic fields, such as Bt and Bp, was developed and successfully installed in the TST-2. The measured local current at the edge just inside the last closed flux surface for ohmic heating was about 15 A.

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Development of a local current diagnostic using a small Rogowski coil for a spherical tokamak plasma in TST-2

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