Self-organized hybrid scenario mediated by fishbone modes in the EAST tokamak

Abstract

Self-organized hybrid scenario mediated by fishbone modes in the Experimental Advanced Superconducting Tokamak (EAST) is reported in this work. In this regime, internal transport barriers(ITBs) and a flat core safety factor profile were maintained simultaneously by fishbone modes. First,the drive of low-frequency flows by fishbone modes is clarified, which subsequently suppresses turbulence transport. Besides, fishbone-induced poloidally symmetric (m = 0) toroidal current sheets were first reported experimentally, which drive outward current redistribution that mitigates core current peaking. Together, these effects enable hybrid operation with stable ITBs and robust magnetohydrodynamic (MHD) stability, revealing a self-organized pathway for sustaining hybrid scenario for fusion reactors.

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BibTeX RIS

BibTeX

@misc{geng2026selforganized,
  title = {{Self-organized hybrid scenario mediated by fishbone modes in the EAST tokamak}},
  author = {J. S. Geng and Y. Q. Chu and B. F. Gao and L. Q. Xu and F. Chen and Z. Y. Qiu and J. P. Qian and X. Z. Gong and Q. Long and Y. X. Li and C. B. Wu and X. H. Wu and Y. F. He and Y. C. Hu and N. Sun and P. J. Sun and Y. H. Zhuge and W. M. Zhang and L. Zhang and W. B. Liu and H. L. Zhao and Y. F. Jin and S. X. Wang and K. N. Geng and K. Jia and Y. X. Jie and H. Lian and R. J. Zhu and S. Z. Yuan and S. B. Zhang and H. Q. Liu and Q. Zang and Y. D. Li and P. Li},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.36875},
  eprint = {2610.36875},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.36875},
}

RIS

TY  - UNPB
TI  - Self-organized hybrid scenario mediated by fishbone modes in the EAST tokamak
AU  - J. S. Geng
AU  - Y. Q. Chu
AU  - B. F. Gao
AU  - L. Q. Xu
AU  - F. Chen
AU  - Z. Y. Qiu
AU  - J. P. Qian
AU  - X. Z. Gong
AU  - Q. Long
AU  - Y. X. Li
AU  - C. B. Wu
AU  - X. H. Wu
AU  - Y. F. He
AU  - Y. C. Hu
AU  - N. Sun
AU  - P. J. Sun
AU  - Y. H. Zhuge
AU  - W. M. Zhang
AU  - L. Zhang
AU  - W. B. Liu
AU  - H. L. Zhao
AU  - Y. F. Jin
AU  - S. X. Wang
AU  - K. N. Geng
AU  - K. Jia
AU  - Y. X. Jie
AU  - H. Lian
AU  - R. J. Zhu
AU  - S. Z. Yuan
AU  - S. B. Zhang
AU  - H. Q. Liu
AU  - Q. Zang
AU  - Y. D. Li
AU  - P. Li
PY  - 2026
DA  - 2026/10/27
PB  - arXiv
DO  - 10.48550/arxiv.2610.36875
UR  - https://arxiv.org/abs/2610.36875
AB  - Self-organized hybrid scenario mediated by fishbone modes in the Experimental Advanced Superconducting Tokamak (EAST) is reported in this work. In this regime, internal transport barriers(ITBs) and a flat core safety factor profile were maintained simultaneously by fishbone modes. First,the drive of low-frequency flows by fishbone modes is clarified, which subsequently suppresses turbulence transport. Besides, fishbone-induced poloidally symmetric (m = 0) toroidal current sheets were first reported experimentally, which drive outward current redistribution that mitigates core current peaking. Together, these effects enable hybrid operation with stable ITBs and robust magnetohydrodynamic (MHD) stability, revealing a self-organized pathway for sustaining hybrid scenario for fusion reactors.
ER  -

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