Enhanced current drive efficiency in a long discharge on TRIAM-1M

K. Hanada; S. Itoh; K. Nakamura; H. Zushi; M. Sakamoto; E. Jotaki; Y. D. Pan; M. Hasegawa; S. Kawasaki; H. Nakashima

doi:10.1088/0029-5515/41/11/302

Enhanced current drive efficiency in a long discharge on TRIAM-1M

K. Hanada, S. Itoh, K. Nakamura, H. Zushi, M. Sakamoto, E. Jotaki, Y. D. Pan, M. Hasegawa, S. Kawasaki, H. Nakashima

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

10 Citations (Scopus)

Abstract

The enhanced current drive (ECD) efficiency mode, which is characterized by a spontaneous increase of current drive efficiency η_CD from (0.3-0.4) × 10¹⁹ A/W m^-2 to (0.6-1.0) × 10¹⁹ A/W m^-2, is observed in long pure LHCD plasmas on TRIAM-1M. The energy confinement time is also improved due to the increase of line averaged electron density, and of the ion and electron temperatures. The current drive efficiency is proportional to the electron density. The transition to ECD mode occurs at a critical density, which depends slightly on the refractive index in the toroidal direction N_∥ of the injected wave.

Original language	English
Pages (from-to)	1539-1542
Number of pages	4
Journal	Nuclear Fusion
Volume	41
Issue number	11
DOIs	https://doi.org/10.1088/0029-5515/41/11/302
Publication status	Published - Nov 1 2001

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

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title = "Enhanced current drive efficiency in a long discharge on TRIAM-1M",

abstract = "The enhanced current drive (ECD) efficiency mode, which is characterized by a spontaneous increase of current drive efficiency ηCD from (0.3-0.4) × 1019 A/W m-2 to (0.6-1.0) × 1019 A/W m-2, is observed in long pure LHCD plasmas on TRIAM-1M. The energy confinement time is also improved due to the increase of line averaged electron density, and of the ion and electron temperatures. The current drive efficiency is proportional to the electron density. The transition to ECD mode occurs at a critical density, which depends slightly on the refractive index in the toroidal direction N∥ of the injected wave.",

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T1 - Enhanced current drive efficiency in a long discharge on TRIAM-1M

AU - Hanada, K.

AU - Itoh, S.

AU - Nakamura, K.

AU - Zushi, H.

AU - Sakamoto, M.

AU - Jotaki, E.

AU - Pan, Y. D.

AU - Hasegawa, M.

AU - Kawasaki, S.

AU - Nakashima, H.

PY - 2001/11/1

Y1 - 2001/11/1

N2 - The enhanced current drive (ECD) efficiency mode, which is characterized by a spontaneous increase of current drive efficiency ηCD from (0.3-0.4) × 1019 A/W m-2 to (0.6-1.0) × 1019 A/W m-2, is observed in long pure LHCD plasmas on TRIAM-1M. The energy confinement time is also improved due to the increase of line averaged electron density, and of the ion and electron temperatures. The current drive efficiency is proportional to the electron density. The transition to ECD mode occurs at a critical density, which depends slightly on the refractive index in the toroidal direction N∥ of the injected wave.

AB - The enhanced current drive (ECD) efficiency mode, which is characterized by a spontaneous increase of current drive efficiency ηCD from (0.3-0.4) × 1019 A/W m-2 to (0.6-1.0) × 1019 A/W m-2, is observed in long pure LHCD plasmas on TRIAM-1M. The energy confinement time is also improved due to the increase of line averaged electron density, and of the ion and electron temperatures. The current drive efficiency is proportional to the electron density. The transition to ECD mode occurs at a critical density, which depends slightly on the refractive index in the toroidal direction N∥ of the injected wave.

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JO - Nuclear Fusion

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Enhanced current drive efficiency in a long discharge on TRIAM-1M

Abstract

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