| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Observation of Electron Fishbone-Like Instabilities in EAST Heavy Impurity Ohmic Plasma |
| XU Li-Qing**, HU Li-Qun**, EAST team |
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031
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| Cite this article: |
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XU Li-Qing, HU Li-Qun, EAST team 2013 Chin. Phys. Lett. 30 075201 |
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Abstract The transient burst of an internal kink mode is first observed in EAST heavy impurity ohmic plasma. The features of the electron fishbone-like mode are presented, and the fishbone-like instabilities are found to be driven by the trapped supra-thermal electrons. The processional frequency of the trapped supra-thermal electrons is calculated with different discharge parameters. The results indicate that the calculated processional frequency is consistent with the experimental observations. Furthermore, we also find that the frequency chirping of the long-lived mode is related to the evolution of the safety factor profile.
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Received: 17 April 2013
Published: 21 November 2013
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| PACS: |
52.25.Dg
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(Plasma kinetic equations)
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52.35.Mw
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(Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.))
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52.35.Py
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(Macroinstabilities (hydromagnetic, e.g., kink, fire-hose, mirror, ballooning, tearing, trapped-particle, flute, Rayleigh-Taylor, etc.))
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