Sawtooth stabilization by localized electron cyclotron heating in a tokamak plasma

K. Hanada, H. Tanaka, M. Iida, S. Ide, T. Minami, M. Nakamura, T. Maekawa, Y. Terumichi, S. Tanaka, M. Yamada, J. Manickam, R. B. White

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

Sawtooth oscillations (STO) in the Ohmically heated WT-3 tokamak are strongly modified or suppressed by localized-electron cyclotron resonance heating (ECH) near the q=1 surface, where q refers to the safety factor. The efect of ECH is much stronger when it is applied on the high-field side as compared to the low-field side. Complete suppression of the STO is achieved for the duration of the ECH, in most cases, when it is applied on the high-field side of a low-density plasma, provided the ECH power exceeds a threshold value. The STO stabilization is attributed to a modification of the current-density profile by hot electrons generated by ECH, which reduces the shear in the q=1 region.

Original languageEnglish
Pages (from-to)1974-1977
Number of pages4
JournalPhysical Review Letters
Volume66
Issue number15
DOIs
Publication statusPublished - Jan 1 1991

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electron cyclotron heating
electron cyclotron resonance
stabilization
heating
oscillations
safety factors
hot electrons
plasma density
retarding
current density
shear
thresholds
profiles

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Hanada, K., Tanaka, H., Iida, M., Ide, S., Minami, T., Nakamura, M., ... White, R. B. (1991). Sawtooth stabilization by localized electron cyclotron heating in a tokamak plasma. Physical Review Letters, 66(15), 1974-1977. https://doi.org/10.1103/PhysRevLett.66.1974

Sawtooth stabilization by localized electron cyclotron heating in a tokamak plasma. / Hanada, K.; Tanaka, H.; Iida, M.; Ide, S.; Minami, T.; Nakamura, M.; Maekawa, T.; Terumichi, Y.; Tanaka, S.; Yamada, M.; Manickam, J.; White, R. B.

In: Physical Review Letters, Vol. 66, No. 15, 01.01.1991, p. 1974-1977.

Research output: Contribution to journalArticle

Hanada, K, Tanaka, H, Iida, M, Ide, S, Minami, T, Nakamura, M, Maekawa, T, Terumichi, Y, Tanaka, S, Yamada, M, Manickam, J & White, RB 1991, 'Sawtooth stabilization by localized electron cyclotron heating in a tokamak plasma', Physical Review Letters, vol. 66, no. 15, pp. 1974-1977. https://doi.org/10.1103/PhysRevLett.66.1974
Hanada, K. ; Tanaka, H. ; Iida, M. ; Ide, S. ; Minami, T. ; Nakamura, M. ; Maekawa, T. ; Terumichi, Y. ; Tanaka, S. ; Yamada, M. ; Manickam, J. ; White, R. B. / Sawtooth stabilization by localized electron cyclotron heating in a tokamak plasma. In: Physical Review Letters. 1991 ; Vol. 66, No. 15. pp. 1974-1977.
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AU - Terumichi, Y.

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