期刊
NUCLEAR FUSION
卷 57, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/1741-4326/57/1/016039
关键词
reversed magnetic shear; energetic particle; double tearing mode; mode transition
资金
- National Nature Science Foundation of China [11547112, 11547311, 11605146, 11261140326]
- Fundamental Research Funds for the Central Universities [2682016CX061]
The modified dispersion relation of q(s) = m/n double tearing modes (DTMs) with trapped energetic ions is derived by the matching procedure of mode structures in the ideal region and resistive layer. It is found that a mode transition between the DTM and the fishbone-like mode can be triggered, depending on fast ion driving, which provides a possible explanation for the observation of experiments (Gunter et al 1999 Nucl. Fusion 39 1793; Maget et al 2006 Nucl. Fusion 46 797). The resistivity scaling of DTMs is changed significantly by on/off-axis heating beams. The effects of beam energy, electron inertia, magnetic shear and plasma resistivity on the stability of the mode and mode transition are discussed in detail.
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