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Related Experiment Video

Updated: Aug 15, 2025

Visually Based Characterization of the Incipient Particle Motion in Regular Substrates: From Laminar to Turbulent Conditions
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Recent progress in the interaction between energetic particles and tearing modes.

Huishan Cai1, Ding Li2,3

  • 1Chinese Academy of Sciences Key Laboratory of Geospace Environment, School of Nuclear Sciences and Technology, University of Science and Technology of China, Hefei 230026, China.

National Science Review
|January 2, 2023
PubMed
Summary

Energetic particles significantly influence tearing modes in tokamak plasmas, affecting their growth and particle transport. This review details these interactions, crucial for magnetic confinement fusion research.

Keywords:
confinementenergetic particlemagnetically confined plasmatearing modetokamaktransport

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Area of Science:

  • Plasma Physics
  • Fusion Energy
  • Magnetohydrodynamics

Background:

  • Energetic particles and tearing modes are critical phenomena in magnetically confined fusion plasmas.
  • Understanding their interactions is essential for achieving stable and efficient fusion reactions in tokamaks.

Purpose of the Study:

  • To review the dynamics of energetic particles and tearing modes in tokamak plasmas.
  • To analyze the influence of energetic particles on tearing modes and the transport of energetic particles by these modes.

Main Methods:

  • Analytical approach to describe physical phenomena.
  • Review of general dispersion relations for tearing modes.
  • Consideration of energetic particle effects in outer and island regions of tearing modes.

Main Results:

  • Energetic particles modify perturbed parallel currents, influencing tearing modes without wave-particle resonance.
  • Resonance interactions between energetic particles and tearing modes are also reviewed.
  • Transport of both circulating and trapped energetic particles by tearing modes is examined.

Conclusions:

  • Energetic particle-tearing mode interactions are complex, involving modifications to mode stability and particle transport.
  • Analytical findings are supported by experimental and simulation data.
  • Several open issues in this field warrant further investigation.