The effect of dynamical lithium powder injection on fuel recycling in EAST

doi:10.16568/j.0254-6086.202504013

Nuclear Fusion and Plasma Physics ›› 2025, Vol. 45 ›› Issue (4): 459-466.DOI: 10.16568/j.0254-6086.202504013

• Plasma Physics • Previous Articles Next Articles

The effect of dynamical lithium powder injection on fuel recycling in EAST

WANG Zhe1, 2, WU Kai2, HUANG Yao1, 2, XU Wei3, SUN Zhen4, HUANG Ming2,ZHOU Zhi-tai2, GUAN Yan-hong2, CHEN Yue2, ZUO Gui-zhong2, HU Jian-shen2

(1. Institute of Material Science and Information Technology, Anhui University, Hefei 230026;2. Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031;3. Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031;4. Princeton Plasma Physics Laboratory, Princeton 08540)

Received:2023-10-30 Revised:2024-06-02 Online:2025-12-15 Published:2025-12-15

EAST 上锂粉流量动态注入对燃料再循环影响研究

汪哲 1, 2，吴凯 2，黄耀 2，徐伟*3，孙震 4，黄明 2，周之泰 2，管艳红 2，陈跃 2，左桂忠 2，胡建生 2

(1. 安徽大学物质科学和信息技术研究院，合肥 230601；2. 中国科学院合肥物质科学研究院等离子体物理研究所，合肥 230031；
3. 合肥综合性国家科学中心能源研究院(安徽省能源实验室)，合肥 230031；4. 普林斯顿大学等离子体物理实验室，普林斯顿 08540)

作者简介:汪哲(1996-)，男，安徽芜湖人，硕士研究生，从事聚变等离子体物理实验研究。
基金资助:
国家重点研发计划项目(2022YFE03100003，2022YFE03130000)；国家自然科学基金项目(12105322，12105135)；安徽省自然科学基金项目(2108085QA38)；青年科学基金项目(12105135)

Abstract

Abstract: The control of fuel particle recycling during plasma discharges in magnetic confinement fusion devices is crucial for the steady operation of long-pulse. In order to explore the control effect of lithium powder injection at different flow rates on fuel recycling, the lithium powder control system was upgraded to allow for real-time, active adjustment of lithium powder flow rates during single plasma discharge. Tabletop test results showed a linear relationship between lithium powder flow rate and control voltage. Based on this, experiments were conducted at EAST to dynamically vary the lithium powder flow rate during a plasma discharge to control fuel recycling. The results demonstrated that the new lithium powder control system can dynamically adjust the lithium powder injection rate in real time during a plasma discharge. Moreover, increasing the lithium powder flow rate further reduced the neutral gas pressure and the D_α emission intensity in the divertor region. This confirmed that increasing the lithium powder injection rate can enhance the control of fuel recycling. This study provides support for future feedback control experiments on fuel recycling during long-pulse, high-performance plasma discharges at EAST.

Key words: Lithium powder, Wall conditioning, Fuel recycling, EAST

摘要： 磁约束聚变装置等离子体放电中燃料粒子再循环的控制对于长脉冲高参数等离子体的稳定运行至关重要。为探索不同流量的锂粉注入对燃料粒子再循环的控制效果，升级了锂粉控制系统以实现单次等离子体放电中锂粉流量大小的实时主动调节。台面测试结果表明，锂粉流量与控制电压满足线性关系。在此基础上，在 EAST 装置开展了锂粉流量动态变化注入对燃料再循环的控制实验，结果表明，该系统在单次等离子体放电过程中实时改变了锂粉注入流量大小。随着锂粉流量增大，偏滤器位置中性气压及 D_ɑ 线辐射强度进一步降低，验证了锂粉注入速率的增加可以增强对燃料再循环的控制。该研究为 EAST 未来长脉冲高参数等离子体放电中燃料再循环的反馈控制实验的开展提供了支持。

关键词: 锂粉, 壁处理, 燃料再循环, EAST

CLC Number:

TL62+9

WANG Zhe, WU Kai, HUANG Yao, XU Wei, SUN Zhen, HUANG Ming, ZHOU Zhi-tai, GUAN Yan-hong, CHEN Yue, ZUO Gui-zhong, HU Jian-shen. The effect of dynamical lithium powder injection on fuel recycling in EAST[J]. Nuclear Fusion and Plasma Physics, 2025, 45(4): 459-466.

汪哲, 吴凯, 黄耀, 徐伟, 孙震, 黄明, 周之泰, 管艳红, 陈跃, 左桂忠, 胡建生 . EAST 上锂粉流量动态注入对燃料再循环影响研究[J]. 核聚变与等离子体物理, 2025, 45(4): 459-466.

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The effect of dynamical lithium powder injection on fuel recycling in EAST

EAST 上锂粉流量动态注入对燃料再循环影响研究

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