Application of compact torus injection system based on pulse high-power technology

Zhao Zhihao; Kong Defeng; Ye Yang; Tan Mingsheng; Zhong Fubin; Qu Chengming; Zhao Hailin; Wang Xiaopeng; Zhang Jin; Wang Erfei; Wang Lishi; Liu Weifeng; Qi Meibin; Zhang Shoubiao

doi:10.11884/HPLPB202638.250454

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Article Navigation > High Power Laser and Particle Beams > 2026 > Accepted Manuscript

Zhao Zhihao, Kong Defeng, Ye Yang, et al. Application of compact torus injection system based on pulse high-power technology[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250454

Citation:

Zhao Zhihao, Kong Defeng, Ye Yang, et al. Application of compact torus injection system based on pulse high-power technology[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250454

Zhao Zhihao, Kong Defeng, Ye Yang, et al. Application of compact torus injection system based on pulse high-power technology[J]. High Power Laser and Particle Beams. doi: 10.11884/HPLPB202638.250454

Citation:

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Application of compact torus injection system based on pulse high-power technology

doi: 10.11884/HPLPB202638.250454

1.
School of Computer Science and Information Engineering, Hefei University of Technology, Hefei 230009, China
2.
Institute of Energy, Hefei Comprehensive National Science Center (Anhui Energy Laboratory), Hefei 230031, China
3.
Institute of Plasma Physics, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China

Received Date: 2025-12-12
Accepted Date: 2026-01-26
Rev Recd Date: 2026-02-09

Available Online: 2026-03-11

Abstract

Abstract

Background
To address the challenge of achieving central fueling in future fusion reactors, this study carried out fueling experiments on the Compact Torus (CT) injection system based on pulse high-power technology. A CT is a high-density plasma blob with self-organized magnetic confinement, and its characteristics make it an ideal carrier for central fueling in fusion devices.
Purpose
The CT injection system is a novel fueling device centered on such plasma blobs. Driven by a pulsed high-power power supply, the system generates stable CT plasma within coaxial electrodes, which undergoes secondary acceleration to form a high-density plasma blob capable of long-distance stable propagation.
Methods
System discharge tests show that the peak discharge current of CT is 300 kA, the average electron density is $ 1.2\times {10}^{22}{\text{ m}}^{-3} $, the velocity is 220 km/s, and it has a stable spheromak structure.
Results
When applied to the EAST tokamak experiment, the results indicate that after CT injection, the plasma stored energy increases by 18%, the plasma density rises by 22%, and the plasma density rise rate is $ 0.4\times {10}^{20}{\text{ m}}^{-3}{\text{s}}^{-1} $, and attains a fueling efficiency of 39%.
Conclusions
Comparative studies with conventional gas puffing (GP) and supersonic molecular beam injection (SMBI) reveal that CT injection outperforms these techniques in terms of injected particle number, fueling efficiency, and particle confinement time during single-shot injections.
- high pulse power,
- compact torus,
- plasma,
- tokamak,
- central fueling

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References(24)

References

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