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- In, Yongkyoon
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Dynamics of energetic particle driven modes and MHD modes in wall-stabilized high-beta plasmas on JT-60U and DIII-D
- Author(s)
- Matsunaga, G., Okabayashi, M., Aiba, N., Boedo, J. A., Ferron, J. R., Hanson, J. M., Hao, G. Z., Heidbrink, W. W., Holcomb, C. T., In, Yongkyoon, Jackson, G. L., Liu, Y. Q., Luce, T. C., McKee, G. R., Osborne, T. H., Pace, D. C., Shinohara, K., Snyder, P. B., Solomon, W. M., Strait, E. J., Turnbull, A. D., Van Zeeland, M. A., Watkins, J. G., Zeng, L.
- Issued Date
- 2013-12
- Citation
- NUCLEAR FUSION, v.53, no.12, pp.123022
- Abstract
- In the wall-stabilized high-beta plasmas in JT-60U and DIII-D, interactions between energetic particle (EP) driven modes (EPdMs) and edge localized modes (ELMs) have been observed. The interaction between the EPdM and ELM are reproducibly observed. Many EP diagnostics indicate a strong correlation between the distorted waveform of the EPdM and the EP transport to the edge. The waveform distortion is composed of higher harmonics (n >= 2) and looks like a density snake near the plasma edge. According to statistical analyses, ELM triggering by the EPdMs requires a finite level of waveform distortion and pedestal recovery. ELM pacing by the EPdMs occurs when the repetition frequency of the EPdMs is higher than the natural ELM frequency. EPs transported by EPdMs are thought to contribute to change the edge stability.
- Publisher
- IOP PUBLISHING LTD
- ISSN
- 0029-5515
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