Nonlinear ion Bernstein wave heating experiment in the WT-3 tokamak

Y. Yasaka, H. Takeno, M. Sakka, O. Sakai, R. Itatani, T. Fujimoto, H. Suemitsu, Kiyoto Takahata, M. Fukao, S. Tanaka, Y. Terumichi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Ion Bernstein wave (IBW) heating at ion cyclotron half-harmonic frequencies was performed in hydrogen (H) discharges in the WT-3 tokamak. The bulk ion temperature increase was measured by a charge exchange analyser and a spatially scanning polychrometer. The latter diagnostics can provide radial ion-temperature profiles. The incremental ion temperature has shown a peak at the exact location where the IBW frequency omega equals 3/2 of the ion cyclotron frequency, indicating the nonlinear direct acceleration of H ions. The wave electric field was measured by a Langmuir probe in the scrape-off layer. The electric field at the second harmonic of the excited IBW frequency was observed to vary depending on the power level and the toroidal magnetic field. These experimental results are compared with the theoretical prediction of nonlinear IBW damping. The measured dependences of the ion heating and the wave amplitude at 2 omega on the toroidal magnetic field are in reasonable agreement with the prediction.

Original languageEnglish
Article number007
Pages (from-to)379-389
Number of pages11
JournalPlasma Physics and Controlled Fusion
Volume35
Issue number3
DOIs
Publication statusPublished - 1993
Externally publishedYes

Fingerprint

Heating
heating
Ions
ions
ion temperature
Experiments
Cyclotrons
harmonics
electric fields
cyclotron frequency
Electric fields
electrostatic probes
predictions
Magnetic fields
magnetic fields
charge exchange
temperature profiles
Langmuir probes
Hydrogen
cyclotrons

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physics and Astronomy(all)

Cite this

Yasaka, Y., Takeno, H., Sakka, M., Sakai, O., Itatani, R., Fujimoto, T., ... Terumichi, Y. (1993). Nonlinear ion Bernstein wave heating experiment in the WT-3 tokamak. Plasma Physics and Controlled Fusion, 35(3), 379-389. [007]. https://doi.org/10.1088/0741-3335/35/3/007

Nonlinear ion Bernstein wave heating experiment in the WT-3 tokamak. / Yasaka, Y.; Takeno, H.; Sakka, M.; Sakai, O.; Itatani, R.; Fujimoto, T.; Suemitsu, H.; Takahata, Kiyoto; Fukao, M.; Tanaka, S.; Terumichi, Y.

In: Plasma Physics and Controlled Fusion, Vol. 35, No. 3, 007, 1993, p. 379-389.

Research output: Contribution to journalArticle

Yasaka, Y, Takeno, H, Sakka, M, Sakai, O, Itatani, R, Fujimoto, T, Suemitsu, H, Takahata, K, Fukao, M, Tanaka, S & Terumichi, Y 1993, 'Nonlinear ion Bernstein wave heating experiment in the WT-3 tokamak', Plasma Physics and Controlled Fusion, vol. 35, no. 3, 007, pp. 379-389. https://doi.org/10.1088/0741-3335/35/3/007
Yasaka, Y. ; Takeno, H. ; Sakka, M. ; Sakai, O. ; Itatani, R. ; Fujimoto, T. ; Suemitsu, H. ; Takahata, Kiyoto ; Fukao, M. ; Tanaka, S. ; Terumichi, Y. / Nonlinear ion Bernstein wave heating experiment in the WT-3 tokamak. In: Plasma Physics and Controlled Fusion. 1993 ; Vol. 35, No. 3. pp. 379-389.
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AU - Fujimoto, T.

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