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

Kazuaki Hanada, Sanae Itoh, Kazuo Nakamura, H. Zushi, M. Sakamoto, Eriko Jotaki, Y. D. Pan, Makoto Hasegawa, S. Kawasaki, H. Nakashima

Research output: Contribution to journalArticle

10 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1539-1542
Number of pages4
JournalNuclear Fusion
Volume41
Issue number11
DOIs
Publication statusPublished - Nov 1 2001

Fingerprint

ion temperature
electron energy
refractivity
energy

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Hanada, K., Itoh, S., Nakamura, K., Zushi, H., Sakamoto, M., Jotaki, E., ... Nakashima, H. (2001). Enhanced current drive efficiency in a long discharge on TRIAM-1M. Nuclear Fusion, 41(11), 1539-1542. https://doi.org/10.1088/0029-5515/41/11/302

Enhanced current drive efficiency in a long discharge on TRIAM-1M. / Hanada, Kazuaki; Itoh, Sanae; Nakamura, Kazuo; Zushi, H.; Sakamoto, M.; Jotaki, Eriko; Pan, Y. D.; Hasegawa, Makoto; Kawasaki, S.; Nakashima, H.

In: Nuclear Fusion, Vol. 41, No. 11, 01.11.2001, p. 1539-1542.

Research output: Contribution to journalArticle

Hanada, K, Itoh, S, Nakamura, K, Zushi, H, Sakamoto, M, Jotaki, E, Pan, YD, Hasegawa, M, Kawasaki, S & Nakashima, H 2001, 'Enhanced current drive efficiency in a long discharge on TRIAM-1M', Nuclear Fusion, vol. 41, no. 11, pp. 1539-1542. https://doi.org/10.1088/0029-5515/41/11/302
Hanada, Kazuaki ; Itoh, Sanae ; Nakamura, Kazuo ; Zushi, H. ; Sakamoto, M. ; Jotaki, Eriko ; Pan, Y. D. ; Hasegawa, Makoto ; Kawasaki, S. ; Nakashima, H. / Enhanced current drive efficiency in a long discharge on TRIAM-1M. In: Nuclear Fusion. 2001 ; Vol. 41, No. 11. pp. 1539-1542.
@article{346164032106460d9dbd970519351278,
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.",
author = "Kazuaki Hanada and Sanae Itoh and Kazuo Nakamura and H. Zushi and M. Sakamoto and Eriko Jotaki and Pan, {Y. D.} and Makoto Hasegawa and S. Kawasaki and H. Nakashima",
year = "2001",
month = "11",
day = "1",
doi = "10.1088/0029-5515/41/11/302",
language = "English",
volume = "41",
pages = "1539--1542",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "IOP Publishing Ltd.",
number = "11",

}

TY - JOUR

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

AU - Hanada, Kazuaki

AU - Itoh, Sanae

AU - Nakamura, Kazuo

AU - Zushi, H.

AU - Sakamoto, M.

AU - Jotaki, Eriko

AU - Pan, Y. D.

AU - Hasegawa, Makoto

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.

UR - http://www.scopus.com/inward/record.url?scp=0035522202&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0035522202&partnerID=8YFLogxK

U2 - 10.1088/0029-5515/41/11/302

DO - 10.1088/0029-5515/41/11/302

M3 - Article

AN - SCOPUS:0035522202

VL - 41

SP - 1539

EP - 1542

JO - Nuclear Fusion

JF - Nuclear Fusion

SN - 0029-5515

IS - 11

ER -