Formation of Advanced Tokamak Plasmas without the Use of an Ohmic-Heating Solenoid

S. Shiraiwa; S. Ide; S. Itoh; O. Mitarai; O. Naito; T. Ozeki; Y. Sakamoto; T. Suzuki; Y. Takase; S. Tanaka; T. Taniguchi; M. Aramasu; T. Fujita; T. Fukuda; X. Gao; M. Gryaznevich; K. Hanada; E. Jotaki; Y. Kamada; T. Maekawa; Y. Miura; K. Nakamura; T. Nishi; H. Tanaka; K. Ushigusa

doi:10.1103/PhysRevLett.92.035001

Formation of Advanced Tokamak Plasmas without the Use of an Ohmic-Heating Solenoid

S. Shiraiwa, S. Ide, S. Itoh, O. Mitarai, O. Naito, T. Ozeki, Y. Sakamoto, T. Suzuki, Y. Takase, S. Tanaka, T. Taniguchi, M. Aramasu, T. Fujita, T. Fukuda, X. Gao, M. Gryaznevich, K. Hanada, E. Jotaki, Y. Kamada, T. MaekawaY. Miura, K. Nakamura, T. Nishi, H. Tanaka, K. Ushigusa

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

3 Citations (Scopus)

Abstract

A new operational scenario of advanced tokamak formation was demonstrated in the JT-60U tokamak. This was accomplished by electron cyclotron and lower hybrid waves, neutral beam injection, and the loop voltage supplied by the vertical field and shaping coils. The Ohmic heating (OH) solenoid was not used but a small inboard coil (part of the shaping coil), providing less than [Formula presented] of total poloidal flux, was used. The plasma thus obtained had both internal and edge transport barriers, with an energy confinement time of 1.6 times H-mode scaling, a poloidal beta of 3.6, and a normalized beta of 1.6, and a large bootstrap current fraction ([Formula presented]). This result opens up a possibility to reduce, and eventually eliminate, the OH solenoid from a tokamak reactor, which will greatly improve its economic competitiveness.

Original language	English
Pages (from-to)	4
Number of pages	1
Journal	Physical review letters
Volume	92
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.92.035001
Publication status	Published - 2004

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.92.035001

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Shiraiwa, S., Ide, S., Itoh, S., Mitarai, O., Naito, O., Ozeki, T., Sakamoto, Y., Suzuki, T., Takase, Y., Tanaka, S., Taniguchi, T., Aramasu, M., Fujita, T., Fukuda, T., Gao, X., Gryaznevich, M., Hanada, K., Jotaki, E., Kamada, Y., ... Ushigusa, K. (2004). Formation of Advanced Tokamak Plasmas without the Use of an Ohmic-Heating Solenoid. Physical review letters, 92(3), 4. https://doi.org/10.1103/PhysRevLett.92.035001

Formation of Advanced Tokamak Plasmas without the Use of an Ohmic-Heating Solenoid. / Shiraiwa, S.; Ide, S.; Itoh, S.; Mitarai, O.; Naito, O.; Ozeki, T.; Sakamoto, Y.; Suzuki, T.; Takase, Y.; Tanaka, S.; Taniguchi, T.; Aramasu, M.; Fujita, T.; Fukuda, T.; Gao, X.; Gryaznevich, M.; Hanada, K.; Jotaki, E.; Kamada, Y.; Maekawa, T.; Miura, Y.; Nakamura, K.; Nishi, T.; Tanaka, H.; Ushigusa, K.

In: Physical review letters, Vol. 92, No. 3, 2004, p. 4.

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

Shiraiwa, S, Ide, S, Itoh, S, Mitarai, O, Naito, O, Ozeki, T, Sakamoto, Y, Suzuki, T, Takase, Y, Tanaka, S, Taniguchi, T, Aramasu, M, Fujita, T, Fukuda, T, Gao, X, Gryaznevich, M, Hanada, K , Jotaki, E, Kamada, Y, Maekawa, T, Miura, Y, Nakamura, K, Nishi, T, Tanaka, H & Ushigusa, K 2004, 'Formation of Advanced Tokamak Plasmas without the Use of an Ohmic-Heating Solenoid', Physical review letters, vol. 92, no. 3, pp. 4. https://doi.org/10.1103/PhysRevLett.92.035001

Shiraiwa, S. ; Ide, S. ; Itoh, S. ; Mitarai, O. ; Naito, O. ; Ozeki, T. ; Sakamoto, Y. ; Suzuki, T. ; Takase, Y. ; Tanaka, S. ; Taniguchi, T. ; Aramasu, M. ; Fujita, T. ; Fukuda, T. ; Gao, X. ; Gryaznevich, M. ; Hanada, K. ; Jotaki, E. ; Kamada, Y. ; Maekawa, T. ; Miura, Y. ; Nakamura, K. ; Nishi, T. ; Tanaka, H. ; Ushigusa, K. / Formation of Advanced Tokamak Plasmas without the Use of an Ohmic-Heating Solenoid. In: Physical review letters. 2004 ; Vol. 92, No. 3. pp. 4.

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abstract = "A new operational scenario of advanced tokamak formation was demonstrated in the JT-60U tokamak. This was accomplished by electron cyclotron and lower hybrid waves, neutral beam injection, and the loop voltage supplied by the vertical field and shaping coils. The Ohmic heating (OH) solenoid was not used but a small inboard coil (part of the shaping coil), providing less than [Formula presented] of total poloidal flux, was used. The plasma thus obtained had both internal and edge transport barriers, with an energy confinement time of 1.6 times H-mode scaling, a poloidal beta of 3.6, and a normalized beta of 1.6, and a large bootstrap current fraction ([Formula presented]). This result opens up a possibility to reduce, and eventually eliminate, the OH solenoid from a tokamak reactor, which will greatly improve its economic competitiveness.",

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AU - Shiraiwa, S.

AU - Ide, S.

AU - Itoh, S.

AU - Mitarai, O.

AU - Naito, O.

AU - Ozeki, T.

AU - Sakamoto, Y.

AU - Suzuki, T.

AU - Takase, Y.

AU - Tanaka, S.

AU - Taniguchi, T.

AU - Aramasu, M.

AU - Fujita, T.

AU - Fukuda, T.

AU - Gao, X.

AU - Gryaznevich, M.

AU - Hanada, K.

AU - Jotaki, E.

AU - Kamada, Y.

AU - Maekawa, T.

AU - Miura, Y.

AU - Nakamura, K.

AU - Nishi, T.

AU - Tanaka, H.

AU - Ushigusa, K.

PY - 2004

Y1 - 2004

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