ICRF current drive by using antenna phase control

Y. Kishimoto, K. Hamamatsu, A. Fukuyama, Sanae Itoh, K. Itoh

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A global analysis of current drive in tokamaks by using waves in the ion cyclotron range of frequencies (ICRF), considering the entire antenna-plasma system, is presented. A phase shifted antenna array is used to inject toroidal momentum into the electrons. Within the context of quasi-linear theory, a Fokker-Planck calculation is combined with an ICRF wave propagation-absorption analysis which includes kinetic effects and realistic boundary conditions. The radial profile of the current induced by the mode converted ion Bernstein wave and by the magnetosonic fast wave is obtained, together with the global current drive efficiency (total induced current/total emitted power from the antennas) in the high density and temperature plasma regime. The phase dependence of the global efficiency is investigated by changing the launching conditions such as the total antenna number and the antenna spacing. – In medium size tokamaks, the electron power absorption and the associated driven current are found to be affected considerably by the plasma cavity resonance. It is also found that the global efficiency is sensitive to the antenna spacing. When the antenna spacing is increased, the global efficiency is reduced by counter current generation.

Original languageEnglish
Pages (from-to)549-567
Number of pages19
JournalNuclear Fusion
Volume27
Issue number4
DOIs
Publication statusPublished - Jan 1 1987

Fingerprint

phase control
cyclotrons
antennas
ions
spacing
plasma antennas
launching
plasma temperature
antenna arrays
plasma density
wave propagation
counters
electrons
boundary conditions
momentum
cavities
kinetics
profiles

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Cite this

Kishimoto, Y., Hamamatsu, K., Fukuyama, A., Itoh, S., & Itoh, K. (1987). ICRF current drive by using antenna phase control. Nuclear Fusion, 27(4), 549-567. https://doi.org/10.1088/0029-5515/27/4/002

ICRF current drive by using antenna phase control. / Kishimoto, Y.; Hamamatsu, K.; Fukuyama, A.; Itoh, Sanae; Itoh, K.

In: Nuclear Fusion, Vol. 27, No. 4, 01.01.1987, p. 549-567.

Research output: Contribution to journalArticle

Kishimoto, Y, Hamamatsu, K, Fukuyama, A, Itoh, S & Itoh, K 1987, 'ICRF current drive by using antenna phase control', Nuclear Fusion, vol. 27, no. 4, pp. 549-567. https://doi.org/10.1088/0029-5515/27/4/002
Kishimoto Y, Hamamatsu K, Fukuyama A, Itoh S, Itoh K. ICRF current drive by using antenna phase control. Nuclear Fusion. 1987 Jan 1;27(4):549-567. https://doi.org/10.1088/0029-5515/27/4/002
Kishimoto, Y. ; Hamamatsu, K. ; Fukuyama, A. ; Itoh, Sanae ; Itoh, K. / ICRF current drive by using antenna phase control. In: Nuclear Fusion. 1987 ; Vol. 27, No. 4. pp. 549-567.
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