Overview of spherical tokamak research in Japan

Y. Takase; A. Ejiri; T. Fujita; N. Fukumoto; A. Fukuyama; K. Hanada; H. Idei; M. Nagata; Y. Ono; H. Tanaka; M. Uchida; R. Horiuchi; Y. Kamada; H. Kasahara; S. Masuzaki; Y. Nagayama; T. Oishi; K. Saito; Y. Takeiri; S. Tsuji-Iio

doi:10.1088/1741-4326/aa62c1

Overview of spherical tokamak research in Japan

Y. Takase, A. Ejiri, T. Fujita, N. Fukumoto, A. Fukuyama, K. Hanada, H. Idei, M. Nagata, Y. Ono, H. Tanaka, M. Uchida, R. Horiuchi, Y. Kamada, H. Kasahara, S. Masuzaki, Y. Nagayama, T. Oishi, K. Saito, Y. Takeiri, S. Tsuji-Iio

Advanced Fusion Research Center

Research output: Contribution to journal › Review article › peer-review

6 Citations (Scopus)

Abstract

Nationally coordinated research on spherical tokamak is being conducted in Japan. Recent achievements include: (i) plasma current start-up and ramp-up without the use of the central solenoid by RF waves (in electron cyclotron and lower hybrid frequency ranges), (ii) plasma current start-up by AC Ohmic operation and by coaxial helicity injection, (iii) development of an advanced fuelling technique by compact toroid injection, (iv) ultra-long-pulse operation and particle control using a high temperature metal wall, (v) access to the ultra-high-β regime by high-power reconnection heating, and (vi) improvement of spherical tokamak plasma stability by externally applied helical field.

Original language	English
Article number	102005
Journal	Nuclear Fusion
Volume	57
Issue number	10
DOIs	https://doi.org/10.1088/1741-4326/aa62c1
Publication status	Published - Jun 20 2017

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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10.1088/1741-4326/aa62c1

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Takase, Y., Ejiri, A., Fujita, T., Fukumoto, N., Fukuyama, A., Hanada, K., Idei, H., Nagata, M., Ono, Y., Tanaka, H., Uchida, M., Horiuchi, R., Kamada, Y., Kasahara, H., Masuzaki, S., Nagayama, Y., Oishi, T., Saito, K., Takeiri, Y., & Tsuji-Iio, S. (2017). Overview of spherical tokamak research in Japan. Nuclear Fusion, 57(10), [102005]. https://doi.org/10.1088/1741-4326/aa62c1

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title = "Overview of spherical tokamak research in Japan",

abstract = "Nationally coordinated research on spherical tokamak is being conducted in Japan. Recent achievements include: (i) plasma current start-up and ramp-up without the use of the central solenoid by RF waves (in electron cyclotron and lower hybrid frequency ranges), (ii) plasma current start-up by AC Ohmic operation and by coaxial helicity injection, (iii) development of an advanced fuelling technique by compact toroid injection, (iv) ultra-long-pulse operation and particle control using a high temperature metal wall, (v) access to the ultra-high-β regime by high-power reconnection heating, and (vi) improvement of spherical tokamak plasma stability by externally applied helical field.",

author = "Y. Takase and A. Ejiri and T. Fujita and N. Fukumoto and A. Fukuyama and K. Hanada and H. Idei and M. Nagata and Y. Ono and H. Tanaka and M. Uchida and R. Horiuchi and Y. Kamada and H. Kasahara and S. Masuzaki and Y. Nagayama and T. Oishi and K. Saito and Y. Takeiri and S. Tsuji-Iio",

note = "Funding Information: Japanese ST collaboration is supported by NIFS/NINS under the project of Promotion of International Network for Scientific Collaborations. Work presented in this article is supported by the NIFS Collaboration Research programs NIFS05KUTR014, NIFS11KUTR069, NIFS12KUTR078, NIFS13KOAR015, NIFS13KUTR093, NIFS13KUTR085, NIFS14KOAP027, NIFS14KOCR001, NIFS14KUTR102, NIFS14KUTR103, NIFS15KLER039, NIFS15KNWS002, NIFS15KUTR112, NIFS16KLEH060, NIFS16KNSS072, NIFS16KNWR002, by JSPS Grants-in-Aid for Scientific Research (S) 21226021, (A) 21246137, (A) 26249142, by Japan/US Cooperation in Fusion Research and Development, and by JSPS A3 Foresight Program {\textquoteleft}Innovative Tokamak Plasma Startup and Current Drive in Spherical Torus{\textquoteright}. Publisher Copyright: {\textcopyright} 2017 IAEA, Vienna.",

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doi = "10.1088/1741-4326/aa62c1",

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T1 - Overview of spherical tokamak research in Japan

AU - Takase, Y.

AU - Ejiri, A.

AU - Fujita, T.

AU - Fukumoto, N.

AU - Fukuyama, A.

AU - Hanada, K.

AU - Idei, H.

AU - Nagata, M.

AU - Ono, Y.

AU - Tanaka, H.

AU - Uchida, M.

AU - Horiuchi, R.

AU - Kamada, Y.

AU - Kasahara, H.

AU - Masuzaki, S.

AU - Nagayama, Y.

AU - Oishi, T.

AU - Saito, K.

AU - Takeiri, Y.

AU - Tsuji-Iio, S.

N1 - Funding Information: Japanese ST collaboration is supported by NIFS/NINS under the project of Promotion of International Network for Scientific Collaborations. Work presented in this article is supported by the NIFS Collaboration Research programs NIFS05KUTR014, NIFS11KUTR069, NIFS12KUTR078, NIFS13KOAR015, NIFS13KUTR093, NIFS13KUTR085, NIFS14KOAP027, NIFS14KOCR001, NIFS14KUTR102, NIFS14KUTR103, NIFS15KLER039, NIFS15KNWS002, NIFS15KUTR112, NIFS16KLEH060, NIFS16KNSS072, NIFS16KNWR002, by JSPS Grants-in-Aid for Scientific Research (S) 21226021, (A) 21246137, (A) 26249142, by Japan/US Cooperation in Fusion Research and Development, and by JSPS A3 Foresight Program ‘Innovative Tokamak Plasma Startup and Current Drive in Spherical Torus’. Publisher Copyright: © 2017 IAEA, Vienna.

PY - 2017/6/20

Y1 - 2017/6/20

N2 - Nationally coordinated research on spherical tokamak is being conducted in Japan. Recent achievements include: (i) plasma current start-up and ramp-up without the use of the central solenoid by RF waves (in electron cyclotron and lower hybrid frequency ranges), (ii) plasma current start-up by AC Ohmic operation and by coaxial helicity injection, (iii) development of an advanced fuelling technique by compact toroid injection, (iv) ultra-long-pulse operation and particle control using a high temperature metal wall, (v) access to the ultra-high-β regime by high-power reconnection heating, and (vi) improvement of spherical tokamak plasma stability by externally applied helical field.

AB - Nationally coordinated research on spherical tokamak is being conducted in Japan. Recent achievements include: (i) plasma current start-up and ramp-up without the use of the central solenoid by RF waves (in electron cyclotron and lower hybrid frequency ranges), (ii) plasma current start-up by AC Ohmic operation and by coaxial helicity injection, (iii) development of an advanced fuelling technique by compact toroid injection, (iv) ultra-long-pulse operation and particle control using a high temperature metal wall, (v) access to the ultra-high-β regime by high-power reconnection heating, and (vi) improvement of spherical tokamak plasma stability by externally applied helical field.

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U2 - 10.1088/1741-4326/aa62c1

DO - 10.1088/1741-4326/aa62c1

M3 - Review article

AN - SCOPUS:85028475124

SN - 0029-5515

VL - 57

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 10

M1 - 102005

ER -

Overview of spherical tokamak research in Japan

Abstract

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