Fuel recycling feedback control via real-time boron powder injection in EAST with full metal wall

Zhe WANG; Zhen SUN; Guizhong ZUO; Kai WU; Yao HUANG; Wei XU; Ming HUANG; Zhitai ZHOU; Yanhong GUAN; Haotian QIU; Rajesh MAINGI; Jiansheng HU

doi:10.1088/2058-6272/ad811f

Plasma Science and Technology > 2024 > 26(12): 125105. > DOI: 10.1088/2058-6272/ad811f

Zhe WANG, Zhen SUN, Guizhong ZUO, Kai WU, Yao HUANG, Wei XU, Ming HUANG, Zhitai ZHOU, Yanhong GUAN, Haotian QIU, Rajesh MAINGI, Jiansheng HU. Fuel recycling feedback control via real-time boron powder injection in EAST with full metal wall[J]. Plasma Science and Technology, 2024, 26(12): 125105. DOI: 10.1088/2058-6272/ad811f

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Fuel recycling feedback control via real-time boron powder injection in EAST with full metal wall

1.
University of Science and Technology of China, Hefei 230026, People’s Republic of China
2.
Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
3.
Princeton Plasma Physics Laboratory, Princeton NJ 08540, United States of America
4.
Institute of Energy, Hefei Comprehensive National Science Center, Hefei 230031, People’s Republic of China

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Author Bio:
Guizhong ZUO: zuoguizh@ipp.ac.cn

Kai WU: wukai@ipp.ac.cn
Corresponding author:
Guizhong ZUO, zuoguizh@ipp.ac.cn

Kai WU, wukai@ipp.ac.cn
Received Date: April 13, 2024
Revised Date: September 17, 2024
Accepted Date: September 24, 2024
Available Online: September 28, 2024
Published Date: November 10, 2024

Graphical Abstract

Abstract

Abstract

A feedback control of fuel recycling via real-time boron powder injection, addressing the issue of continuously increasing recycling in long-pulse plasma discharges, has been successfully developed and implemented on EAST tokamak. The feedback control system includes four main parts: the impurity powder dropper (IPD), a diagnostic system measuring fuel recycling level represented by D_α emission, a plasma control system (PCS) implementing the Proportional Integral Derivative (PID) algorithm, and a signal converter connecting the IPD and PCS. Based on this control system, both active control and feedback control experiments have recently been performed on EAST with a full metal wall. The experimental results show that the fuel recycling can be gradually reduced to lower level as PCS control voltage increases. In the feedback control experiments, it is also observed that the D_α emission is reduced to the level below the target D_α value by adjusting boron injection flow rate, indicating successful implementation of the fuel recycling feedback control on EAST. This technique provides a new method for fuel recycling control of long pulse and high parameter plasma operations in future fusion devices.
- fuel recycling,
- feedback control,
- boron powder,
- EAST

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Acknowledgments

This research was funded by the National Key Research and Development Program of China (Nos. 2022YFE03130000 and 2022YFE03130003), National Natural Science Foundation of China (Nos. 12205336 and 12475208), The Strategic Priority Research Program of Chinese Academy of Sciences (No. XDB0790102), the Provincial Natural Science Foundation of Anhui (No. 2408085J002), and Interdisciplinary and Collaborative Teams of CAS.

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