Impact of magnetic X-points on the vertical stability of tokamak plasmas

AbstractMagnetic islands (MIs), resulting from a magnetic field reconnection, are ubiquitous structures in magnetized plasmas. In tokamak plasmas, recent researches suggested that the interaction between an MI and ambient turbulence can be important for the nonlinear MI evolution, but a lack of detailed experimental observations and analyses has prevented further understanding. Here, we provide comprehensive observations such as turbulence spreading into an MI and turbulence enhancement at the reconnection site, elucidating intricate effects of plasma turbulence on the nonlinear MI evolution.

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Simulation of the loss of passing fast ions induced by magnetic islands in EAST tokamak plasmas

AIP Advances ◽

10.1063/5.0032049 ◽

2021 ◽

Vol 11 (2) ◽

pp. 025020

Author(s):

Limin Yu ◽

Erbing Xue ◽

Debing Zhang ◽

Shuyu Zheng ◽

Xianmei Zhang ◽

...

Keyword(s):

Tokamak Plasmas ◽

Magnetic Islands ◽

Fast Ions

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Nonlinear radial envelope evolution equations and energetic particle transport in tokamak plasmas

Journal of Physics Conference Series ◽

10.1088/1742-6596/1785/1/012005 ◽

2021 ◽

Vol 1785 (1) ◽

pp. 012005 ◽

Cited By ~ 1

Author(s):

Fulvio Zonca ◽

Liu Chen ◽

Matteo V. Falessi ◽

Zhiyong Qiu

Keyword(s):

Particle Transport ◽

Energetic Particle ◽

Evolution Equations ◽

Tokamak Plasmas ◽

Energetic Particle Transport

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Turbulent transport of fast ions in tokamak plasmas in the presence of resonant magnetic perturbations

Physics of Plasmas ◽

10.1063/5.0035541 ◽

2021 ◽

Vol 28 (2) ◽

pp. 022508

Author(s):

D. I. Palade

Keyword(s):

Turbulent Transport ◽

Tokamak Plasmas ◽

Fast Ions ◽

Magnetic Perturbations ◽

Resonant Magnetic Perturbations

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Study on vertical motion reduction of a trimaran based on collaborative controlled appendages

International Journal of Advanced Robotic Systems ◽

10.1177/1729881420976779 ◽

2020 ◽

Vol 17 (6) ◽

pp. 172988142097677

Author(s):

Zhilin Liu ◽

Linhe Zheng ◽

Guosheng Li ◽

Shouzheng Yuan ◽

Songbai Yang

Keyword(s):

Experimental Study ◽

Vertical Motion ◽

Model Tests ◽

Wave Period ◽

Regular Waves ◽

Towing Tank ◽

Vertical Stability ◽

Stabilization Control ◽

Stability Performance

In recent years, the trimaran as a novel ship has been greatly developed. The subsequent large vertical motion needs to be studied and resolved. In this article, an experimental study for a trimaran vertical stabilization control is carried out. Three modes including the bare trimaran (the trimaran without appendages, the trimaran with fixed appendages, and the trimaran with controlled appendages) are performed through model tests in a towing tank. The model tests are performed in regular waves. The range of wave period is 2.0–4.0 s, and the speed of the carriage is 2.93 and 6.51 m/s. The results of the three modes show the fixed appendages and the actively controlled appendages are all effective for the vertical motion reduction of the trimaran. Moreover, the controlled appendages are more effective for the vertical stability performance of the trimaran.

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