Experimental observation of ion heating by mode-converted ion Bernstein waves in tokamak plasmas

Xj, Zhang; Zhao, Yiyi; Wan, B. N.; Gong, X.Z.; Lin, Y.; Zhang, Weiya; Mao, Yuxin; Qin, Chenghu; Yuan, Shuai; Deng, Xu; Wang, L; Ju, SQ; Chen, Ye; Li, YD; Li, JG; Noterdaeme, Jean-Marie; Wukitch, S. J.

doi:10.1088/0029-5515/52/8/082003

Cited by 8 publications

(5 citation statements)

References 25 publications

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“… 2011 ; Zhang et al. 2012 ). In the solar wind, there are indications that some wave components agree with the dispersion relations of the ion Bernstein mode (Perschke et al.…”

Section: Space–time Structurementioning

confidence: 99%

Space–time structure and wavevector anisotropy in space plasma turbulence

Narita

2018

Living Rev Sol Phys

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Space and astrophysical plasmas often develop into a turbulent state and exhibit nearly random and stochastic motions. While earlier studies emphasize more on understanding the energy spectrum of turbulence in the one-dimensional context (either in the frequency or the wavenumber domain), recent achievements in plasma turbulence studies provide an increasing amount of evidence that plasma turbulence is essentially a spatially and temporally evolving phenomenon. This review presents various models for the space–time structure and anisotropy of the turbulent fields in space plasmas, or equivalently the energy spectra in the wavenumber–frequency domain for the space–time structures and that in the wavevector domain for the anisotropies. The turbulence energy spectra are evaluated in different one-dimensional spectral domains; one speaks of the frequency spectra in the spacecraft observations and the wavenumber spectra in the numerical simulation studies. The notion of the wavenumber–frequency spectrum offers a more comprehensive picture of the turbulent fields, and good models can explain the one-dimensional spectra in the both domains at the same time. To achieve this goal, the Doppler shift, the Doppler broadening, linear-mode dispersion relations, and sideband waves are reviewed. The energy spectra are then extended to the wavevector domain spanning the directions parallel and perpendicular to the large-scale magnetic field. By doing so, the change in the spectral index at different projections onto the one-dimensional spectral domain can be explained in a simpler way.

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“… 2011 ; Zhang et al. 2012 ). In the solar wind, there are indications that some wave components agree with the dispersion relations of the ion Bernstein mode (Perschke et al.…”

Section: Space–time Structurementioning

confidence: 99%

Space–time structure and wavevector anisotropy in space plasma turbulence

Narita

2018

Living Rev Sol Phys

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“…The Bernstein mode can be both electrostatic and electromagnetic, and is particularly suited for transferring the fluctuation energy toward higher frequencies by three-wave couplings [37]. The ion Bernstein mode is extensively studied in Tokamak, fusion, and laboratory plasmas [38][39][40][41][42]. Several observational studies indicate the ion Bernstein mode in the solar wind [43,44].…”

Section: Ion Bernstein Modementioning

confidence: 99%

Ion-Scale Sideband Waves and Filament Formation: Alfvénic Impact on Heliospheric Plasma Turbulence

Narita

Motschmann

2017

Front. Phys.

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“…The plasma is heated by ICRF at 0.5 s. Calculations by TORIC module integrated in TRANSP code indicate that in the ICRF heated plasma, the ICRF power deposited on electrons is clearly off-axis. In previous research, TORIC code had already been validated in conditions similar to that of HT-7 experiment [11,12] . The simulated results were in reasonable agreement with experiment observations in those reports.…”

Section: Typical Energy Pinch Phenomenon In Ht-7 Plasmasmentioning

confidence: 99%

Observation of Electron Energy Pinch in HT-7 ICRF Heated Plasmas

Ding

Wan

Wang

2014

Plasma Sci. Technol.

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Inward energy transport (pinch phenomenon) in the electron channel is observed in HT-7 plasmas using off-axis ion cyclotron resonance frequency (ICRF) heating. Experimental results and power balance transport analysis by TRANSP code are presented in this article. With the aids of GLF23 and Chang-Hinton transport models, which predict energy diffusivity in experimental conditions, the estimated electron pinch velocity is obtained by experimental data and is found reasonably comparable to the results in the previous study, such as Song on Tore Supra. Density scanning shows that the energy convective velocity in the electron channel has a close relation to density scale length, which is qualitatively in agreement with Wang's theoretical prediction. The parametric dependence of electron energy convective velocity on plasma current is still ambiguous and is worthy of future research on EAST.

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Experimental observation of ion heating by mode-converted ion Bernstein waves in tokamak plasmas

Cited by 8 publications

References 25 publications

Space–time structure and wavevector anisotropy in space plasma turbulence

Space–time structure and wavevector anisotropy in space plasma turbulence

Ion-Scale Sideband Waves and Filament Formation: Alfvénic Impact on Heliospheric Plasma Turbulence

Observation of Electron Energy Pinch in HT-7 ICRF Heated Plasmas

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