Heating by an electron bernstein wave in a spherical tokamak plasma via mode conversion

S. Shiraiwa; K. Hanada; M. Hasegawa; H. Idei; H. Kasahara; O. Mitarai; K. Nakamura; N. Nishino; H. Nozato; M. Sakamoto; K. Sasaki; K. Sato; Y. Takase; T. Yamada; H. Zushi

doi:10.1103/PhysRevLett.96.185003

Heating by an electron bernstein wave in a spherical tokamak plasma via mode conversion

S. Shiraiwa, K. Hanada, M. Hasegawa, H. Idei, H. Kasahara, O. Mitarai, K. Nakamura, N. Nishino, H. Nozato, M. Sakamoto, K. Sasaki, K. Sato, Y. Takase, T. Yamada, H. Zushi

Division of Nuclear Fusion Dynamics

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

34 Citations (Scopus)

Abstract

The first successful high power heating of a high dielectric constant spherical tokamak plasma by an electron Bernstein wave (EBW) is reported. An EBW was excited by mode conversion (MC) of an X mode cyclotron wave injected from the low magnetic field side of the TST-2 spherical tokamak. Evidence of electron heating was observed as increases in the stored energy and soft x-ray emission. The increased emission was concentrated in the plasma core region. A heating efficiency of over 50% was achieved, when the density gradient in the MC region was sufficiently steep.

Original language	English
Article number	185003
Journal	Physical review letters
Volume	96
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.96.185003
Publication status	Published - 2006

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.96.185003

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Shiraiwa, S., Hanada, K., Hasegawa, M., Idei, H., Kasahara, H., Mitarai, O., Nakamura, K., Nishino, N., Nozato, H., Sakamoto, M., Sasaki, K., Sato, K., Takase, Y., Yamada, T., & Zushi, H. (2006). Heating by an electron bernstein wave in a spherical tokamak plasma via mode conversion. Physical review letters, 96(18), Article 185003. https://doi.org/10.1103/PhysRevLett.96.185003

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abstract = "The first successful high power heating of a high dielectric constant spherical tokamak plasma by an electron Bernstein wave (EBW) is reported. An EBW was excited by mode conversion (MC) of an X mode cyclotron wave injected from the low magnetic field side of the TST-2 spherical tokamak. Evidence of electron heating was observed as increases in the stored energy and soft x-ray emission. The increased emission was concentrated in the plasma core region. A heating efficiency of over 50% was achieved, when the density gradient in the MC region was sufficiently steep.",

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AU - Shiraiwa, S.

AU - Hanada, K.

AU - Hasegawa, M.

AU - Idei, H.

AU - Kasahara, H.

AU - Mitarai, O.

AU - Nakamura, K.

AU - Nishino, N.

AU - Nozato, H.

AU - Sakamoto, M.

AU - Sasaki, K.

AU - Sato, K.

AU - Takase, Y.

AU - Yamada, T.

AU - Zushi, H.

PY - 2006

Y1 - 2006

N2 - The first successful high power heating of a high dielectric constant spherical tokamak plasma by an electron Bernstein wave (EBW) is reported. An EBW was excited by mode conversion (MC) of an X mode cyclotron wave injected from the low magnetic field side of the TST-2 spherical tokamak. Evidence of electron heating was observed as increases in the stored energy and soft x-ray emission. The increased emission was concentrated in the plasma core region. A heating efficiency of over 50% was achieved, when the density gradient in the MC region was sufficiently steep.

AB - The first successful high power heating of a high dielectric constant spherical tokamak plasma by an electron Bernstein wave (EBW) is reported. An EBW was excited by mode conversion (MC) of an X mode cyclotron wave injected from the low magnetic field side of the TST-2 spherical tokamak. Evidence of electron heating was observed as increases in the stored energy and soft x-ray emission. The increased emission was concentrated in the plasma core region. A heating efficiency of over 50% was achieved, when the density gradient in the MC region was sufficiently steep.

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Heating by an electron bernstein wave in a spherical tokamak plasma via mode conversion

Abstract

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